Wallet sync seems to be slow

[kevacoin-project]

We received reports from some users that Kevacoin wallet sync was slow.

Steps to reproduce (command line):

1. Make sure the Kevacoin data directory is clean (do not accidentally delete your wallet.dat), so that the wallet will sync from the beginning.
2. On one console, run kevacoind.
3. On the other console, run kevacoin-cli getblockcount. This command returns after a long period of time.

On GUI wallet, the connecting to peers ... message last for a long time.

[kevacoin-project]

Part of the reason wallet sync is slow (at least it seems that way) is because Kevacoin uses Cryptonight R hash algorithm. A good and modern CPU may process about 50 - 100 hashes per second. The wallet sync starts with block header download, and the wallet needs to verify the headers. E.g. a short blockchain with 10000 block headers may take up to 100 - 200 seconds to process.

Maybe like Monero, we need to show some process information.

[markg85]

Note that the sync process (i'm in the middle of it right now) uses only one core and seems to be doing:
Download -> process -> download -> process, etc...

It would be much more efficient to download as much as you can and use all the available cpu cores.
That would probably improve syncing speed massively!

Also, i think the litecoin wallet (where this kavacoin one was forked from) is improved a lit already. See here where a user claims that: https://www.reddit.com/r/litecoin/comments/7m0ler/how_long_should_my_wallet_take_to_sync/
So you might need to update the codebase (if that is still possible) to benefit "for free" basically :)