Extend Profile-Guided Optimization guide with Sampling PGO #117023
Description
Location
https://doc.rust-lang.org/rustc/profile-guided-optimization.html
Summary
Right now the page describes in detail only one approach for doing PGO - PGO via Instrumentation. But as the documentation already mentions at the beginning there is one more way - PGO via Sampling (perf-based).
Clang already describes sampling PGO, but I guess we need to mention and describe it explicitly in the Rustc documentation too. Now, after the documentation describes in detail only the approach with the instrumentation and PGO users in Rust can miss the sampling way.