Signature verification is very slow.

[dvush]

Hi @tomusdrw !

I used this library for eth signature verification.

The main issue that I have with it is that it is very slow. recover is around 3ms, but using rust bindings to native library (that you use under the hood) recover is around 66us. I found reason for this is that you create secp256k1::Secp256k1::verification_only() for every signature verification, this function by itself costs around 2.7 ms so it sums up.

Consider adding benchmarks, also I would suggest using thread_local to store secp256k1::Secp256k1::verification_only() objects.

Sincerely, Vitaly.

[tomusdrw]

Hi @dvush!
For now it was a concious decision to not focus on performance, thanks for the input, we already have a similar issue here: #14.
I'm definitely up for introducing benchmarks and lazy_static or thread_local to alleviate low performance. PRs welcome!

[dvush]

Thanks for response, I'll try to create PR with benchmarks at least, since I already done them in our project.