Evaluate Profile-Guided Optimization (PGO)

[zamazan4ik]

Hi!

Recently I checked Profile-Guided Optimization (PGO) improvements on multiple projects. The results are here. The most interesting to Vesper results probably are PGO results on operating systems (Linux kernel and Windows): https://github.com/zamazan4ik/awesome-pgo#operating-systems

We need to perform PGO benchmarks on Vesper. And if it shows improvements - add a note about possible improvements in Vesper performance with PGO. Providing an easier way (e.g. a build option) to build scripts with PGO can be useful for the end-users too. I think this kind of optimization can be useful for the project since if PGO will be able to optimize somehow CPU workload of the operating system, we can potentially reduce requirements for the hardware and possibly decrease power consumption.

For the Rust projects, I suggest trying to start with cargo-pgo.

Here you can find different materials about PGO: benchmarks in different software, examples of how PGO is already integrated with different projects, PGO support in multiple compilers, and some PGO-related pieces of advice.