[FEATURE] Memory usage improvements

[purplesmoke05]

Is your feature request related to a problem? Please describe.

The amount of memory resources that indexer batch uses would be high.
Since the configuration provides the option to start them with a single container,
it is possible to run out of memory up to the memory usage limit of the container.
Reducing memory usage is required.

Describe the solution you'd like

Currently no. We would like to investigate memory usage and clear what potential memory savings are possible.

[purplesmoke05]

Indexer batch profiling

Result

It seems reasonable that indexer batch would use 0.6MB〜0.8MB of memory per a Token.
And it would be a little effect to remove unnecessary attribute from web3 contract object.

Content

• I found that the reason is that ABIs read from DB along with token list are put in memory and their size would increases with the number of tokens.
• Ran indexer_transfer.py batch in a closed local environment and set memory profiler(memray), then issuing 250 tokens.
• The batch consumed about 200 MB of memory.

• I was left for an hour and did not advance the block number. No memory leak had occurred.

• At least 0.6MB to 0.8 MB of memory per token is expected to be consumed by the contract object.
• (Since there is a process to read these ABI data from DB each cycle, I/O could also be a high load.)

Additional Information

• In addition, I looked at the memory usage of objects obtained from web3.eth.contract when loading ABI.
• It consumes approximately 210 MB.

• And memory usage can be reduced by eliminating unnecessary attributes from web3.eth.Contract object.
• Memory usage decreased by 30 MB.

Snippets to reproduce

import sys
from web3 import Web3
from web3.contract import Contract

web3 = Web3(Web3.HTTPProvider("http:localhost:8545"))

abi = """[{"inputs": [{"internalType": "string", "name": "_name", "type": "string"}, {"internalType": "string", "name": "_symbol", "type": "string"}, {"internalType": "uint256", "name": "_issuePrice", "type": "uint256"}, {"internalType": "uint256", "name": "_totalSupply", "type": "uint256"}, {"internalType": "uint256", "name": "_dividends", "type": "uint256"}, {"internalType": "string", "name": "_dividendRecordDate", "type": "string"}, {"internalType": "string", "name": "_dividendPaymentDate", "type": "string"}, {"internalType": "string", "name": "_cancellationDate", "type": "string"}, {"internalType": "uint256", "name": "_principalValue", "type": "uint256"}], "stateMutability": "nonpayable", "type": "constructor"}, {"anonymous": false, "inputs": [{"indexed": false, "internalType": "address", "name": "accountAddress", "type": "address"}, {"indexed": false, "internalType": "uint256", "name": "amount", "type": "uint256"}], "name": "Allot", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": false, "internalType": "address", "name": "accountAddress", "type": "address"}, {"indexed": false, "internalType": "uint256", "name": "amount", "type": "uint256"}, {"indexed": false, "internalType": "string", "name": "data", "type": "string"}], "name": "ApplyForOffering", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": true, "internalType": "uint256", "name": "index", "type": "uint256"}, {"indexed": false, "internalType": "address", "name": "from", "type": "address"}, {"indexed": false, "internalType": "address", "name": "to", "type": "address"}, {"indexed": false, "internalType": "uint256", "name": "value", "type": "uint256"}, {"indexed": false, "internalType": "string", "name": "data", "type": "string"}], "name": "ApplyForTransfer", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": true, "internalType": "uint256", "name": "index", "type": "uint256"}, {"indexed": false, "internalType": "address", "name": "from", "type": "address"}, {"indexed": false, "internalType": "address", "name": "to", "type": "address"}, {"indexed": false, "internalType": "string", "name": "data", "type": "string"}], "name": "ApproveTransfer", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": false, "internalType": "address", "name": "lockAddress", "type": "address"}, {"indexed": false, "internalType": "bool", "name": "auth", "type": "bool"}], "name": "AuthorizeLockAddress", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": true, "internalType": "uint256", "name": "index", "type": "uint256"}, {"indexed": false, "internalType": "address", "name": "from", "type": "address"}, {"indexed": false, "internalType": "address", "name": "to", "type": "address"}, {"indexed": false, "internalType": "string", "name": "data", "type": "string"}], "name": "CancelTransfer", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": false, "internalType": "uint256", "name": "dividends", "type": "uint256"}, {"indexed": false, "internalType": "string", "name": "dividendRecordDate", "type": "string"}, {"indexed": false, "internalType": "string", "name": "dividendPaymentDate", "type": "string"}], "name": "ChangeDividendInformation", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": true, "internalType": "bool", "name": "status", "type": "bool"}], "name": "ChangeOfferingStatus", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": true, "internalType": "bool", "name": "status", "type": "bool"}], "name": "ChangeStatus", "type": "event"}, {"anonymous": false, "inputs": [], "name": "ChangeToCanceled", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": false, "internalType": "bool", "name": "required", "type": "bool"}], "name": "ChangeTransferApprovalRequired", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": true, "internalType": "address", "name": "from", "type": "address"}, {"indexed": true, "internalType": "address", "name": "targetAddress", "type": "address"}, {"indexed": true, "internalType": "address", "name": "lockAddress", "type": "address"}, {"indexed": false, "internalType": "uint256", "name": "amount", "type": "uint256"}], "name": "Issue", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": true, "internalType": "address", "name": "accountAddress", "type": "address"}, {"indexed": true, "internalType": "address", "name": "lockAddress", "type": "address"}, {"indexed": false, "internalType": "uint256", "name": "value", "type": "uint256"}], "name": "Lock", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": true, "internalType": "address", "name": "previousOwner", "type": "address"}, {"indexed": true, "internalType": "address", "name": "newOwner", "type": "address"}], "name": "OwnershipTransferred", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": true, "internalType": "address", "name": "from", "type": "address"}, {"indexed": true, "internalType": "address", "name": "targetAddress", "type": "address"}, {"indexed": true, "internalType": "address", "name": "lockAddress", "type": "address"}, {"indexed": false, "internalType": "uint256", "name": "amount", "type": "uint256"}], "name": "Redeem", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": true, "internalType": "address", "name": "from", "type": "address"}, {"indexed": true, "internalType": "address", "name": "to", "type": "address"}, {"indexed": false, "internalType": "uint256", "name": "value", "type": "uint256"}], "name": "Transfer", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": true, "internalType": "address", "name": "accountAddress", "type": "address"}, {"indexed": true, "internalType": "address", "name": "lockAddress", "type": "address"}, {"indexed": false, "internalType": "address", "name": "recipientAddress", "type": "address"}, {"indexed": false, "internalType": "uint256", "name": "value", "type": "uint256"}], "name": "Unlock", "type": "event"}, {"inputs": [{"internalType": "address", "name": "_accountAddress", "type": "address"}, {"internalType": "uint256", "name": "_amount", "type": "uint256"}], "name": "allot", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "address", "name": "", "type": "address"}], "name": "applicationsForOffering", "outputs": [{"internalType": "uint256", "name": "applicationAmount", "type": "uint256"}, {"internalType": "uint256", "name": "allotmentAmount", "type": "uint256"}, {"internalType": "string", "name": "data", "type": "string"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "uint256", "name": "", "type": "uint256"}], "name": "applicationsForTransfer", "outputs": [{"internalType": "address", "name": "from", "type": "address"}, {"internalType": "address", "name": "to", "type": "address"}, {"internalType": "uint256", "name": "amount", "type": "uint256"}, {"internalType": "bool", "name": "valid", "type": "bool"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "uint256", "name": "_amount", "type": "uint256"}, {"internalType": "string", "name": "_data", "type": "string"}], "name": "applyForOffering", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "address", "name": "_to", "type": "address"}, {"internalType": "uint256", "name": "_value", "type": "uint256"}, {"internalType": "string", "name": "_data", "type": "string"}], "name": "applyForTransfer", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "uint256", "name": "_index", "type": "uint256"}, {"internalType": "string", "name": "_data", "type": "string"}], "name": "approveTransfer", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "address", "name": "_lockAddress", "type": "address"}, {"internalType": "bool", "name": "_auth", "type": "bool"}], "name": "authorizeLockAddress", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "address", "name": "", "type": "address"}], "name": "authorizedLockAddress", "outputs": [{"internalType": "bool", "name": "", "type": "bool"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "address", "name": "_address", "type": "address"}], "name": "balanceOf", "outputs": [{"internalType": "uint256", "name": "", "type": "uint256"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "address", "name": "", "type": "address"}], "name": "balances", "outputs": [{"internalType": "uint256", "name": "", "type": "uint256"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "address[]", "name": "_toList", "type": "address[]"}, {"internalType": "uint256[]", "name": "_valueList", "type": "uint256[]"}], "name": "bulkTransfer", "outputs": [{"internalType": "bool", "name": "success", "type": "bool"}], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "uint256", "name": "_index", "type": "uint256"}, {"internalType": "string", "name": "_data", "type": "string"}], "name": "cancelTransfer", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [], "name": "cancellationDate", "outputs": [{"internalType": "string", "name": "", "type": "string"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "bool", "name": "_isOffering", "type": "bool"}], "name": "changeOfferingStatus", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [], "name": "changeToCanceled", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [], "name": "contactInformation", "outputs": [{"internalType": "string", "name": "", "type": "string"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "dividendInformation", "outputs": [{"internalType": "uint256", "name": "dividends", "type": "uint256"}, {"internalType": "string", "name": "dividendRecordDate", "type": "string"}, {"internalType": "string", "name": "dividendPaymentDate", "type": "string"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "isCanceled", "outputs": [{"internalType": "bool", "name": "", "type": "bool"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "isOffering", "outputs": [{"internalType": "bool", "name": "", "type": "bool"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "address", "name": "_target_address", "type": "address"}, {"internalType": "address", "name": "_locked_address", "type": "address"}, {"internalType": "uint256", "name": "_amount", "type": "uint256"}], "name": "issueFrom", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [], "name": "issuePrice", "outputs": [{"internalType": "uint256", "name": "", "type": "uint256"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "address", "name": "_lockAddress", "type": "address"}, {"internalType": "uint256", "name": "_value", "type": "uint256"}], "name": "lock", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "address", "name": "", "type": "address"}, {"internalType": "address", "name": "", "type": "address"}], "name": "locked", "outputs": [{"internalType": "uint256", "name": "", "type": "uint256"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "address", "name": "_lockAddress", "type": "address"}, {"internalType": "address", "name": "_accountAddress", "type": "address"}], "name": "lockedOf", "outputs": [{"internalType": "uint256", "name": "", "type": "uint256"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "memo", "outputs": [{"internalType": "string", "name": "", "type": "string"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "name", "outputs": [{"internalType": "string", "name": "", "type": "string"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "offeringStatus", "outputs": [{"internalType": "bool", "name": "", "type": "bool"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "owner", "outputs": [{"internalType": "address", "name": "", "type": "address"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "address", "name": "", "type": "address"}], "name": "pendingTransfer", "outputs": [{"internalType": "uint256", "name": "", "type": "uint256"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "personalInfoAddress", "outputs": [{"internalType": "address", "name": "", "type": "address"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "principalValue", "outputs": [{"internalType": "uint256", "name": "", "type": "uint256"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "privacyPolicy", "outputs": [{"internalType": "string", "name": "", "type": "string"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "address", "name": "_target_address", "type": "address"}, {"internalType": "address", "name": "_locked_address", "type": "address"}, {"internalType": "uint256", "name": "_amount", "type": "uint256"}], "name": "redeemFrom", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "uint8", "name": "", "type": "uint8"}], "name": "referenceUrls", "outputs": [{"internalType": "string", "name": "", "type": "string"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "string", "name": "_cancellationDate", "type": "string"}], "name": "setCancellationDate", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "string", "name": "_contactInformation", "type": "string"}], "name": "setContactInformation", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "uint256", "name": "_dividends", "type": "uint256"}, {"internalType": "string", "name": "_dividendRecordDate", "type": "string"}, {"internalType": "string", "name": "_dividendPaymentDate", "type": "string"}], "name": "setDividendInformation", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "string", "name": "_memo", "type": "string"}], "name": "setMemo", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "address", "name": "_address", "type": "address"}], "name": "setPersonalInfoAddress", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "uint256", "name": "_principalValue", "type": "uint256"}], "name": "setPrincipalValue", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "string", "name": "_privacyPolicy", "type": "string"}], "name": "setPrivacyPolicy", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "bool", "name": "_status", "type": "bool"}], "name": "setStatus", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "address", "name": "_exchange", "type": "address"}], "name": "setTradableExchange", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "bool", "name": "_required", "type": "bool"}], "name": "setTransferApprovalRequired", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "bool", "name": "_transferable", "type": "bool"}], "name": "setTransferable", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [], "name": "status", "outputs": [{"internalType": "bool", "name": "", "type": "bool"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "symbol", "outputs": [{"internalType": "string", "name": "", "type": "string"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "totalSupply", "outputs": [{"internalType": "uint256", "name": "", "type": "uint256"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "tradableExchange", "outputs": [{"internalType": "address", "name": "", "type": "address"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "address", "name": "_to", "type": "address"}, {"internalType": "uint256", "name": "_value", "type": "uint256"}], "name": "transfer", "outputs": [{"internalType": "bool", "name": "", "type": "bool"}], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [], "name": "transferApprovalRequired", "outputs": [{"internalType": "bool", "name": "", "type": "bool"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "address", "name": "_from", "type": "address"}, {"internalType": "address", "name": "_to", "type": "address"}, {"internalType": "uint256", "name": "_value", "type": "uint256"}], "name": "transferFrom", "outputs": [{"internalType": "bool", "name": "success", "type": "bool"}], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "address", "name": "newOwner", "type": "address"}], "name": "transferOwnership", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [], "name": "transferable", "outputs": [{"internalType": "bool", "name": "", "type": "bool"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "address", "name": "_accountAddress", "type": "address"}, {"internalType": "address", "name": "_recipientAddress", "type": "address"}, {"internalType": "uint256", "name": "_value", "type": "uint256"}], "name": "unlock", "outputs": [], "stateMutability": "nonpayable", "type": "function"}]"""

target_address = "0x6E18c885c625e5e2c47dcC9C73bE69646E884Ae5"


class TestProcessor:
    def contract_factory(self, contract_address: str) -> Contract:
        return web3.eth.contract(address=contract_address, abi=abi)

    def contract_factory_with_delete(self, contract_address: str) -> Contract:
        contract = web3.eth.contract(address=contract_address, abi=abi)
        contract.functions = None
        contract.caller = None
        contract.abi = None
        return contract

    def bulk_create_contract_object(self, with_delete: bool):
        self.contract_list = []
        if with_delete:
            for _ in range(250):
                contract = self.contract_factory_with_delete(target_address)
                self.contract_list.append(contract)
        else:
            for _ in range(250):
                contract = self.contract_factory(target_address)
                self.contract_list.append(contract)


def bulk_create_loop():
    test_processor = TestProcessor()

    with_delete = False
    if len(sys.argv) > 1 and "with_delete" in sys.argv:
        with_delete = True

    for _ in range(20):
        test_processor.bulk_create_contract_object(with_delete=with_delete)


if __name__ == "__main__":
    bulk_create_loop()

[purplesmoke05]

• After a few months, I found that web3.eth.contract() with contract_address argument uses twice as much memory than without contract_address argument.
• https://github.com/ethereum/web3.py/blob/v5.31.3/web3/eth.py#L950-L960

---

1. 250 call web3.eth.contract() with contract_address argument

snippets

import sys
from web3 import Web3
from web3.contract import Contract

web3 = Web3(Web3.HTTPProvider("http:localhost:8545"))

abi = """[{"inputs": [{"internalType": "string", "name": "_name", "type": "string"}, {"internalType": "string", "name": "_symbol", "type": "string"}, {"internalType": "uint256", "name": "_issuePrice", "type": "uint256"}, {"internalType": "uint256", "name": "_totalSupply", "type": "uint256"}, {"internalType": "uint256", "name": "_dividends", "type": "uint256"}, {"internalType": "string", "name": "_dividendRecordDate", "type": "string"}, {"internalType": "string", "name": "_dividendPaymentDate", "type": "string"}, {"internalType": "string", "name": "_cancellationDate", "type": "string"}, {"internalType": "uint256", "name": "_principalValue", "type": "uint256"}], "stateMutability": "nonpayable", "type": "constructor"}, {"anonymous": false, "inputs": [{"indexed": false, "internalType": "address", "name": "accountAddress", "type": "address"}, {"indexed": false, "internalType": "uint256", "name": "amount", "type": "uint256"}], "name": "Allot", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": false, "internalType": "address", "name": "accountAddress", "type": "address"}, {"indexed": false, "internalType": "uint256", "name": "amount", "type": "uint256"}, {"indexed": false, "internalType": "string", "name": "data", "type": "string"}], "name": "ApplyForOffering", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": true, "internalType": "uint256", "name": "index", "type": "uint256"}, {"indexed": false, "internalType": "address", "name": "from", "type": "address"}, {"indexed": false, "internalType": "address", "name": "to", "type": "address"}, {"indexed": false, "internalType": "uint256", "name": "value", "type": "uint256"}, {"indexed": false, "internalType": "string", "name": "data", "type": "string"}], "name": "ApplyForTransfer", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": true, "internalType": "uint256", "name": "index", "type": "uint256"}, {"indexed": false, "internalType": "address", "name": "from", "type": "address"}, {"indexed": false, "internalType": "address", "name": "to", "type": "address"}, {"indexed": false, "internalType": "string", "name": "data", "type": "string"}], "name": "ApproveTransfer", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": false, "internalType": "address", "name": "lockAddress", "type": "address"}, {"indexed": false, "internalType": "bool", "name": "auth", "type": "bool"}], "name": "AuthorizeLockAddress", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": true, "internalType": "uint256", "name": "index", "type": "uint256"}, {"indexed": false, "internalType": "address", "name": "from", "type": "address"}, {"indexed": false, "internalType": "address", "name": "to", "type": "address"}, {"indexed": false, "internalType": "string", "name": "data", "type": "string"}], "name": "CancelTransfer", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": false, "internalType": "uint256", "name": "dividends", "type": "uint256"}, {"indexed": false, "internalType": "string", "name": "dividendRecordDate", "type": "string"}, {"indexed": false, "internalType": "string", "name": "dividendPaymentDate", "type": "string"}], "name": "ChangeDividendInformation", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": true, "internalType": "bool", "name": "status", "type": "bool"}], "name": "ChangeOfferingStatus", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": true, "internalType": "bool", "name": "status", "type": "bool"}], "name": "ChangeStatus", "type": "event"}, {"anonymous": false, "inputs": [], "name": "ChangeToCanceled", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": false, "internalType": "bool", "name": "required", "type": "bool"}], "name": "ChangeTransferApprovalRequired", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": true, "internalType": "address", "name": "from", "type": "address"}, {"indexed": true, "internalType": "address", "name": "targetAddress", "type": "address"}, {"indexed": true, "internalType": "address", "name": "lockAddress", "type": "address"}, {"indexed": false, "internalType": "uint256", "name": "amount", "type": "uint256"}], "name": "Issue", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": true, "internalType": "address", "name": "accountAddress", "type": "address"}, {"indexed": true, "internalType": "address", "name": "lockAddress", "type": "address"}, {"indexed": false, "internalType": "uint256", "name": "value", "type": "uint256"}], "name": "Lock", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": true, "internalType": "address", "name": "previousOwner", "type": "address"}, {"indexed": true, "internalType": "address", "name": "newOwner", "type": "address"}], "name": "OwnershipTransferred", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": true, "internalType": "address", "name": "from", "type": "address"}, {"indexed": true, "internalType": "address", "name": "targetAddress", "type": "address"}, {"indexed": true, "internalType": "address", "name": "lockAddress", "type": "address"}, {"indexed": false, "internalType": "uint256", "name": "amount", "type": "uint256"}], "name": "Redeem", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": true, "internalType": "address", "name": "from", "type": "address"}, {"indexed": true, "internalType": "address", "name": "to", "type": "address"}, {"indexed": false, "internalType": "uint256", "name": "value", "type": "uint256"}], "name": "Transfer", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": true, "internalType": "address", "name": "accountAddress", "type": "address"}, {"indexed": true, "internalType": "address", "name": "lockAddress", "type": "address"}, {"indexed": false, "internalType": "address", "name": "recipientAddress", "type": "address"}, {"indexed": false, "internalType": "uint256", "name": "value", "type": "uint256"}], "name": "Unlock", "type": "event"}, {"inputs": [{"internalType": "address", "name": "_accountAddress", "type": "address"}, {"internalType": "uint256", "name": "_amount", "type": "uint256"}], "name": "allot", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "address", "name": "", "type": "address"}], "name": "applicationsForOffering", "outputs": [{"internalType": "uint256", "name": "applicationAmount", "type": "uint256"}, {"internalType": "uint256", "name": "allotmentAmount", "type": "uint256"}, {"internalType": "string", "name": "data", "type": "string"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "uint256", "name": "", "type": "uint256"}], "name": "applicationsForTransfer", "outputs": [{"internalType": "address", "name": "from", "type": "address"}, {"internalType": "address", "name": "to", "type": "address"}, {"internalType": "uint256", "name": "amount", "type": "uint256"}, {"internalType": "bool", "name": "valid", "type": "bool"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "uint256", "name": "_amount", "type": "uint256"}, {"internalType": "string", "name": "_data", "type": "string"}], "name": "applyForOffering", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "address", "name": "_to", "type": "address"}, {"internalType": "uint256", "name": "_value", "type": "uint256"}, {"internalType": "string", "name": "_data", "type": "string"}], "name": "applyForTransfer", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "uint256", "name": "_index", "type": "uint256"}, {"internalType": "string", "name": "_data", "type": "string"}], "name": "approveTransfer", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "address", "name": "_lockAddress", "type": "address"}, {"internalType": "bool", "name": "_auth", "type": "bool"}], "name": "authorizeLockAddress", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "address", "name": "", "type": "address"}], "name": "authorizedLockAddress", "outputs": [{"internalType": "bool", "name": "", "type": "bool"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "address", "name": "_address", "type": "address"}], "name": "balanceOf", "outputs": [{"internalType": "uint256", "name": "", "type": "uint256"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "address", "name": "", "type": "address"}], "name": "balances", "outputs": [{"internalType": "uint256", "name": "", "type": "uint256"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "address[]", "name": "_toList", "type": "address[]"}, {"internalType": "uint256[]", "name": "_valueList", "type": "uint256[]"}], "name": "bulkTransfer", "outputs": [{"internalType": "bool", "name": "success", "type": "bool"}], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "uint256", "name": "_index", "type": "uint256"}, {"internalType": "string", "name": "_data", "type": "string"}], "name": "cancelTransfer", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [], "name": "cancellationDate", "outputs": [{"internalType": "string", "name": "", "type": "string"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "bool", "name": "_isOffering", "type": "bool"}], "name": "changeOfferingStatus", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [], "name": "changeToCanceled", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [], "name": "contactInformation", "outputs": [{"internalType": "string", "name": "", "type": "string"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "dividendInformation", "outputs": [{"internalType": "uint256", "name": "dividends", "type": "uint256"}, {"internalType": "string", "name": "dividendRecordDate", "type": "string"}, {"internalType": "string", "name": "dividendPaymentDate", "type": "string"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "isCanceled", "outputs": [{"internalType": "bool", "name": "", "type": "bool"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "isOffering", "outputs": [{"internalType": "bool", "name": "", "type": "bool"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "address", "name": "_target_address", "type": "address"}, {"internalType": "address", "name": "_locked_address", "type": "address"}, {"internalType": "uint256", "name": "_amount", "type": "uint256"}], "name": "issueFrom", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [], "name": "issuePrice", "outputs": [{"internalType": "uint256", "name": "", "type": "uint256"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "address", "name": "_lockAddress", "type": "address"}, {"internalType": "uint256", "name": "_value", "type": "uint256"}], "name": "lock", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "address", "name": "", "type": "address"}, {"internalType": "address", "name": "", "type": "address"}], "name": "locked", "outputs": [{"internalType": "uint256", "name": "", "type": "uint256"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "address", "name": "_lockAddress", "type": "address"}, {"internalType": "address", "name": "_accountAddress", "type": "address"}], "name": "lockedOf", "outputs": [{"internalType": "uint256", "name": "", "type": "uint256"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "memo", "outputs": [{"internalType": "string", "name": "", "type": "string"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "name", "outputs": [{"internalType": "string", "name": "", "type": "string"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "offeringStatus", "outputs": [{"internalType": "bool", "name": "", "type": "bool"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "owner", "outputs": [{"internalType": "address", "name": "", "type": "address"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "address", "name": "", "type": "address"}], "name": "pendingTransfer", "outputs": [{"internalType": "uint256", "name": "", "type": "uint256"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "personalInfoAddress", "outputs": [{"internalType": "address", "name": "", "type": "address"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "principalValue", "outputs": [{"internalType": "uint256", "name": "", "type": "uint256"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "privacyPolicy", "outputs": [{"internalType": "string", "name": "", "type": "string"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "address", "name": "_target_address", "type": "address"}, {"internalType": "address", "name": "_locked_address", "type": "address"}, {"internalType": "uint256", "name": "_amount", "type": "uint256"}], "name": "redeemFrom", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "uint8", "name": "", "type": "uint8"}], "name": "referenceUrls", "outputs": [{"internalType": "string", "name": "", "type": "string"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "string", "name": "_cancellationDate", "type": "string"}], "name": "setCancellationDate", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "string", "name": "_contactInformation", "type": "string"}], "name": "setContactInformation", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "uint256", "name": "_dividends", "type": "uint256"}, {"internalType": "string", "name": "_dividendRecordDate", "type": "string"}, {"internalType": "string", "name": "_dividendPaymentDate", "type": "string"}], "name": "setDividendInformation", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "string", "name": "_memo", "type": "string"}], "name": "setMemo", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "address", "name": "_address", "type": "address"}], "name": "setPersonalInfoAddress", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "uint256", "name": "_principalValue", "type": "uint256"}], "name": "setPrincipalValue", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "string", "name": "_privacyPolicy", "type": "string"}], "name": "setPrivacyPolicy", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "bool", "name": "_status", "type": "bool"}], "name": "setStatus", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "address", "name": "_exchange", "type": "address"}], "name": "setTradableExchange", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "bool", "name": "_required", "type": "bool"}], "name": "setTransferApprovalRequired", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "bool", "name": "_transferable", "type": "bool"}], "name": "setTransferable", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [], "name": "status", "outputs": [{"internalType": "bool", "name": "", "type": "bool"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "symbol", "outputs": [{"internalType": "string", "name": "", "type": "string"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "totalSupply", "outputs": [{"internalType": "uint256", "name": "", "type": "uint256"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "tradableExchange", "outputs": [{"internalType": "address", "name": "", "type": "address"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "address", "name": "_to", "type": "address"}, {"internalType": "uint256", "name": "_value", "type": "uint256"}], "name": "transfer", "outputs": [{"internalType": "bool", "name": "", "type": "bool"}], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [], "name": "transferApprovalRequired", "outputs": [{"internalType": "bool", "name": "", "type": "bool"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "address", "name": "_from", "type": "address"}, {"internalType": "address", "name": "_to", "type": "address"}, {"internalType": "uint256", "name": "_value", "type": "uint256"}], "name": "transferFrom", "outputs": [{"internalType": "bool", "name": "success", "type": "bool"}], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "address", "name": "newOwner", "type": "address"}], "name": "transferOwnership", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [], "name": "transferable", "outputs": [{"internalType": "bool", "name": "", "type": "bool"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "address", "name": "_accountAddress", "type": "address"}, {"internalType": "address", "name": "_recipientAddress", "type": "address"}, {"internalType": "uint256", "name": "_value", "type": "uint256"}], "name": "unlock", "outputs": [], "stateMutability": "nonpayable", "type": "function"}]"""

target_address = "0x6E18c885c625e5e2c47dcC9C73bE69646E884Ae5"


class TestProcessor:
    def contract_factory(self, contract_address: str) -> Contract:
        return web3.eth.contract(address=contract_address, abi=abi)

    def bulk_create_contract_object(self):
        self.contract_list = []
        for _ in range(250):
            contract = self.contract_factory(target_address)
            self.contract_list.append(contract)


def bulk_create_loop():
    test_processor = TestProcessor()
    test_processor.bulk_create_contract_object()


if __name__ == "__main__":
    bulk_create_loop()

---

2. 250 call web3.eth.contract() without contract_address argument ( reuse factory)

snippets

import sys
from web3 import Web3
from web3.contract import Contract

web3 = Web3(Web3.HTTPProvider("http:localhost:8545"))

abi = """[{"inputs": [{"internalType": "string", "name": "_name", "type": "string"}, {"internalType": "string", "name": "_symbol", "type": "string"}, {"internalType": "uint256", "name": "_issuePrice", "type": "uint256"}, {"internalType": "uint256", "name": "_totalSupply", "type": "uint256"}, {"internalType": "uint256", "name": "_dividends", "type": "uint256"}, {"internalType": "string", "name": "_dividendRecordDate", "type": "string"}, {"internalType": "string", "name": "_dividendPaymentDate", "type": "string"}, {"internalType": "string", "name": "_cancellationDate", "type": "string"}, {"internalType": "uint256", "name": "_principalValue", "type": "uint256"}], "stateMutability": "nonpayable", "type": "constructor"}, {"anonymous": false, "inputs": [{"indexed": false, "internalType": "address", "name": "accountAddress", "type": "address"}, {"indexed": false, "internalType": "uint256", "name": "amount", "type": "uint256"}], "name": "Allot", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": false, "internalType": "address", "name": "accountAddress", "type": "address"}, {"indexed": false, "internalType": "uint256", "name": "amount", "type": "uint256"}, {"indexed": false, "internalType": "string", "name": "data", "type": "string"}], "name": "ApplyForOffering", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": true, "internalType": "uint256", "name": "index", "type": "uint256"}, {"indexed": false, "internalType": "address", "name": "from", "type": "address"}, {"indexed": false, "internalType": "address", "name": "to", "type": "address"}, {"indexed": false, "internalType": "uint256", "name": "value", "type": "uint256"}, {"indexed": false, "internalType": "string", "name": "data", "type": "string"}], "name": "ApplyForTransfer", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": true, "internalType": "uint256", "name": "index", "type": "uint256"}, {"indexed": false, "internalType": "address", "name": "from", "type": "address"}, {"indexed": false, "internalType": "address", "name": "to", "type": "address"}, {"indexed": false, "internalType": "string", "name": "data", "type": "string"}], "name": "ApproveTransfer", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": false, "internalType": "address", "name": "lockAddress", "type": "address"}, {"indexed": false, "internalType": "bool", "name": "auth", "type": "bool"}], "name": "AuthorizeLockAddress", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": true, "internalType": "uint256", "name": "index", "type": "uint256"}, {"indexed": false, "internalType": "address", "name": "from", "type": "address"}, {"indexed": false, "internalType": "address", "name": "to", "type": "address"}, {"indexed": false, "internalType": "string", "name": "data", "type": "string"}], "name": "CancelTransfer", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": false, "internalType": "uint256", "name": "dividends", "type": "uint256"}, {"indexed": false, "internalType": "string", "name": "dividendRecordDate", "type": "string"}, {"indexed": false, "internalType": "string", "name": "dividendPaymentDate", "type": "string"}], "name": "ChangeDividendInformation", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": true, "internalType": "bool", "name": "status", "type": "bool"}], "name": "ChangeOfferingStatus", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": true, "internalType": "bool", "name": "status", "type": "bool"}], "name": "ChangeStatus", "type": "event"}, {"anonymous": false, "inputs": [], "name": "ChangeToCanceled", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": false, "internalType": "bool", "name": "required", "type": "bool"}], "name": "ChangeTransferApprovalRequired", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": true, "internalType": "address", "name": "from", "type": "address"}, {"indexed": true, "internalType": "address", "name": "targetAddress", "type": "address"}, {"indexed": true, "internalType": "address", "name": "lockAddress", "type": "address"}, {"indexed": false, "internalType": "uint256", "name": "amount", "type": "uint256"}], "name": "Issue", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": true, "internalType": "address", "name": "accountAddress", "type": "address"}, {"indexed": true, "internalType": "address", "name": "lockAddress", "type": "address"}, {"indexed": false, "internalType": "uint256", "name": "value", "type": "uint256"}], "name": "Lock", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": true, "internalType": "address", "name": "previousOwner", "type": "address"}, {"indexed": true, "internalType": "address", "name": "newOwner", "type": "address"}], "name": "OwnershipTransferred", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": true, "internalType": "address", "name": "from", "type": "address"}, {"indexed": true, "internalType": "address", "name": "targetAddress", "type": "address"}, {"indexed": true, "internalType": "address", "name": "lockAddress", "type": "address"}, {"indexed": false, "internalType": "uint256", "name": "amount", "type": "uint256"}], "name": "Redeem", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": true, "internalType": "address", "name": "from", "type": "address"}, {"indexed": true, "internalType": "address", "name": "to", "type": "address"}, {"indexed": false, "internalType": "uint256", "name": "value", "type": "uint256"}], "name": "Transfer", "type": "event"}, {"anonymous": false, "inputs": [{"indexed": true, "internalType": "address", "name": "accountAddress", "type": "address"}, {"indexed": true, "internalType": "address", "name": "lockAddress", "type": "address"}, {"indexed": false, "internalType": "address", "name": "recipientAddress", "type": "address"}, {"indexed": false, "internalType": "uint256", "name": "value", "type": "uint256"}], "name": "Unlock", "type": "event"}, {"inputs": [{"internalType": "address", "name": "_accountAddress", "type": "address"}, {"internalType": "uint256", "name": "_amount", "type": "uint256"}], "name": "allot", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "address", "name": "", "type": "address"}], "name": "applicationsForOffering", "outputs": [{"internalType": "uint256", "name": "applicationAmount", "type": "uint256"}, {"internalType": "uint256", "name": "allotmentAmount", "type": "uint256"}, {"internalType": "string", "name": "data", "type": "string"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "uint256", "name": "", "type": "uint256"}], "name": "applicationsForTransfer", "outputs": [{"internalType": "address", "name": "from", "type": "address"}, {"internalType": "address", "name": "to", "type": "address"}, {"internalType": "uint256", "name": "amount", "type": "uint256"}, {"internalType": "bool", "name": "valid", "type": "bool"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "uint256", "name": "_amount", "type": "uint256"}, {"internalType": "string", "name": "_data", "type": "string"}], "name": "applyForOffering", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "address", "name": "_to", "type": "address"}, {"internalType": "uint256", "name": "_value", "type": "uint256"}, {"internalType": "string", "name": "_data", "type": "string"}], "name": "applyForTransfer", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "uint256", "name": "_index", "type": "uint256"}, {"internalType": "string", "name": "_data", "type": "string"}], "name": "approveTransfer", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "address", "name": "_lockAddress", "type": "address"}, {"internalType": "bool", "name": "_auth", "type": "bool"}], "name": "authorizeLockAddress", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "address", "name": "", "type": "address"}], "name": "authorizedLockAddress", "outputs": [{"internalType": "bool", "name": "", "type": "bool"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "address", "name": "_address", "type": "address"}], "name": "balanceOf", "outputs": [{"internalType": "uint256", "name": "", "type": "uint256"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "address", "name": "", "type": "address"}], "name": "balances", "outputs": [{"internalType": "uint256", "name": "", "type": "uint256"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "address[]", "name": "_toList", "type": "address[]"}, {"internalType": "uint256[]", "name": "_valueList", "type": "uint256[]"}], "name": "bulkTransfer", "outputs": [{"internalType": "bool", "name": "success", "type": "bool"}], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "uint256", "name": "_index", "type": "uint256"}, {"internalType": "string", "name": "_data", "type": "string"}], "name": "cancelTransfer", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [], "name": "cancellationDate", "outputs": [{"internalType": "string", "name": "", "type": "string"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "bool", "name": "_isOffering", "type": "bool"}], "name": "changeOfferingStatus", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [], "name": "changeToCanceled", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [], "name": "contactInformation", "outputs": [{"internalType": "string", "name": "", "type": "string"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "dividendInformation", "outputs": [{"internalType": "uint256", "name": "dividends", "type": "uint256"}, {"internalType": "string", "name": "dividendRecordDate", "type": "string"}, {"internalType": "string", "name": "dividendPaymentDate", "type": "string"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "isCanceled", "outputs": [{"internalType": "bool", "name": "", "type": "bool"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "isOffering", "outputs": [{"internalType": "bool", "name": "", "type": "bool"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "address", "name": "_target_address", "type": "address"}, {"internalType": "address", "name": "_locked_address", "type": "address"}, {"internalType": "uint256", "name": "_amount", "type": "uint256"}], "name": "issueFrom", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [], "name": "issuePrice", "outputs": [{"internalType": "uint256", "name": "", "type": "uint256"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "address", "name": "_lockAddress", "type": "address"}, {"internalType": "uint256", "name": "_value", "type": "uint256"}], "name": "lock", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "address", "name": "", "type": "address"}, {"internalType": "address", "name": "", "type": "address"}], "name": "locked", "outputs": [{"internalType": "uint256", "name": "", "type": "uint256"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "address", "name": "_lockAddress", "type": "address"}, {"internalType": "address", "name": "_accountAddress", "type": "address"}], "name": "lockedOf", "outputs": [{"internalType": "uint256", "name": "", "type": "uint256"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "memo", "outputs": [{"internalType": "string", "name": "", "type": "string"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "name", "outputs": [{"internalType": "string", "name": "", "type": "string"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "offeringStatus", "outputs": [{"internalType": "bool", "name": "", "type": "bool"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "owner", "outputs": [{"internalType": "address", "name": "", "type": "address"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "address", "name": "", "type": "address"}], "name": "pendingTransfer", "outputs": [{"internalType": "uint256", "name": "", "type": "uint256"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "personalInfoAddress", "outputs": [{"internalType": "address", "name": "", "type": "address"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "principalValue", "outputs": [{"internalType": "uint256", "name": "", "type": "uint256"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "privacyPolicy", "outputs": [{"internalType": "string", "name": "", "type": "string"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "address", "name": "_target_address", "type": "address"}, {"internalType": "address", "name": "_locked_address", "type": "address"}, {"internalType": "uint256", "name": "_amount", "type": "uint256"}], "name": "redeemFrom", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "uint8", "name": "", "type": "uint8"}], "name": "referenceUrls", "outputs": [{"internalType": "string", "name": "", "type": "string"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "string", "name": "_cancellationDate", "type": "string"}], "name": "setCancellationDate", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "string", "name": "_contactInformation", "type": "string"}], "name": "setContactInformation", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "uint256", "name": "_dividends", "type": "uint256"}, {"internalType": "string", "name": "_dividendRecordDate", "type": "string"}, {"internalType": "string", "name": "_dividendPaymentDate", "type": "string"}], "name": "setDividendInformation", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "string", "name": "_memo", "type": "string"}], "name": "setMemo", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "address", "name": "_address", "type": "address"}], "name": "setPersonalInfoAddress", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "uint256", "name": "_principalValue", "type": "uint256"}], "name": "setPrincipalValue", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "string", "name": "_privacyPolicy", "type": "string"}], "name": "setPrivacyPolicy", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "bool", "name": "_status", "type": "bool"}], "name": "setStatus", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "address", "name": "_exchange", "type": "address"}], "name": "setTradableExchange", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "bool", "name": "_required", "type": "bool"}], "name": "setTransferApprovalRequired", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "bool", "name": "_transferable", "type": "bool"}], "name": "setTransferable", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [], "name": "status", "outputs": [{"internalType": "bool", "name": "", "type": "bool"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "symbol", "outputs": [{"internalType": "string", "name": "", "type": "string"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "totalSupply", "outputs": [{"internalType": "uint256", "name": "", "type": "uint256"}], "stateMutability": "view", "type": "function"}, {"inputs": [], "name": "tradableExchange", "outputs": [{"internalType": "address", "name": "", "type": "address"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "address", "name": "_to", "type": "address"}, {"internalType": "uint256", "name": "_value", "type": "uint256"}], "name": "transfer", "outputs": [{"internalType": "bool", "name": "", "type": "bool"}], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [], "name": "transferApprovalRequired", "outputs": [{"internalType": "bool", "name": "", "type": "bool"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "address", "name": "_from", "type": "address"}, {"internalType": "address", "name": "_to", "type": "address"}, {"internalType": "uint256", "name": "_value", "type": "uint256"}], "name": "transferFrom", "outputs": [{"internalType": "bool", "name": "success", "type": "bool"}], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [{"internalType": "address", "name": "newOwner", "type": "address"}], "name": "transferOwnership", "outputs": [], "stateMutability": "nonpayable", "type": "function"}, {"inputs": [], "name": "transferable", "outputs": [{"internalType": "bool", "name": "", "type": "bool"}], "stateMutability": "view", "type": "function"}, {"inputs": [{"internalType": "address", "name": "_accountAddress", "type": "address"}, {"internalType": "address", "name": "_recipientAddress", "type": "address"}, {"internalType": "uint256", "name": "_value", "type": "uint256"}], "name": "unlock", "outputs": [], "stateMutability": "nonpayable", "type": "function"}]"""

target_address = "0x6E18c885c625e5e2c47dcC9C73bE69646E884Ae5"

def get_size(obj, seen=None):
    """Recursively finds size of objects"""
    size = sys.getsizeof(obj)
    if seen is None:
        seen = set()
    obj_id = id(obj)
    if obj_id in seen:
        return 0
    # Important mark as seen *before* entering recursion to gracefully handle
    # self-referential objects
    seen.add(obj_id)
    if isinstance(obj, dict):
        size += sum([get_size(v, seen) for v in obj.values()])
        size += sum([get_size(k, seen) for k in obj.keys()])
    elif hasattr(obj, '__dict__'):
        size += get_size(obj.__dict__, seen)
    elif hasattr(obj, '__iter__') and not isinstance(obj, (str, bytes, bytearray)):
        size += sum([get_size(i, seen) for i in obj])
    return size


class TestProcessor:
    factory = None

    @classmethod
    def contract_factory(cls, contract_address: str) -> Contract:
        if cls.factory is not None:
            return cls.factory(address=contract_address)

        cls.factory = web3.eth.contract(abi=abi)
        return cls.factory(address=contract_address)


    def bulk_create_contract_object(self):
        self.contract_list = []
        for _ in range(250):
            contract = self.contract_factory(target_address)
            self.contract_list.append(contract)


def bulk_create_loop():
    test_processor = TestProcessor()

    test_processor.bulk_create_contract_object()


if __name__ == "__main__":
    bulk_create_loop()

---

• So we'd like to change so that contract factory is reused.