Benchmark crypto-cpp

[war-in]

Feature Request

We would like to use more cryptography from the crypto-cpp library. If the results will be promising we will probably use crypto-cpp to replace some functions:

• private_to_stark_key
• verify
• sign
• pedersen_hash

[cptartur]

From my testing it seems:

• verify has similar performance in cpp and python
• hash is faster in cpp for longer inputs, for short python is faster
• sign is substantially lower in cpp, 6-10x slower than python implementation

sign is problematic enough that I'd say it currently prevents us from using crypto-cpp version at all. It is probably the most often used crypto operation in starknet.py and 6-10x slowdown would be noticeable to all users.