[New Feature] Evalaute Post-Link Optimizations (PLO) for YugabyteDB

[zamazan4ik]

Description

Post-Link Optimizations (PLO) is an additional optimization step after Profile-Guided Optimization (PGO) that can improve performance even after PGO.

Right now there are two main PLO tools: LLVM BOLT and Propeller.

Here I collect all results by applying LLVM BOLT to the projects (with benchmark numbers).

• Rustc:
  • Rustc itself (GitHub PR)
  • LLVM in Rustc (Reddit)
• CPython: GitHub PR
• YDB: GitHub comment
• Clang:
  • Slides
  • Results on building Clang
  • Linaro results
  • on AMD 7950X3D
  • GitHub comment from LLVM
• LDC: GitHub comment
• HHVM, Proxygen and others: Facebook paper
• NodeJS: Blog
• Chromium: Blog
• MySQL, MongoDB, memcached, Verilator: Paper
• ast-grep: GitHub issue
• Symbolicator: GitHub issue

Projects with already integrated BOLT into their build scripts

• Rustc: GitHub PR
• CPython: GitHub PR
• Pyston:
  • README
  • Makefile
• Clang: CMake script

@NatashaSerebryanaya in #12763 (comment) you mentioned that you will try to perform tests with LLVM BOLT. Did you get any results? Would be really interesting to see them.

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