Anything that involves ECC is very slow, also prevents using 100% of CPU in parallel mode

[Coding-Enthusiast]

Due to the way it is implemented (using BigInteger) elliptic curve cryptography is slow in this project.
Also any part that requires it in parallel mode fails to use 100% of CPU (usually swings between 60% to 70%) such as mnemonic recovery or any ICompareService that has to convert private key to public key.

The plan to solve this is to re-implement ECC using a custom readonly struct ModularUInt256 with optimized algorithms to compute point multiplication and a lot of the modular arithmetic used in ECC.

[Coding-Enthusiast]

This was fixed for almost all recovery options in commits from 4568d27 to ec00ce6.