Evaluate Profile-Guided Optimization (PGO) and LLVM BOLT

[zamazan4ik]

Hi!

Recently I did a lot of Profile-Guided Optimization (PGO) benchmarks on different software - all available results are here. According to my tests, PGO can help with achieving better performance in many kinds of workloads. That's why I think it would be a good idea to test PGO on Sui.

I can suggest to do the following things:

• Evaluate PGO on Sui
• If it benefits Sui - add a note to the Sui documentation about building with PGO. In this case, users and maintainers who build their own Sui packages will be aware of PGO as an additional way to optimize Sui
• Optimize provided by Sui team binaries on the CI (like it's already done for other projects like Rustc), if any
• After that, I suggest trying to apply LLVM BOLT as an additional post-PGO step. Rustc already does it on some platforms

For the Rust projects, I suggest PGO optimizing with cargo-pgo.