[all-commits] [llvm/llvm-project] 35af20: [BOLT] Parallelize legacy profile merging

[Yi Kong via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 35af20d9e036deeed250b73fd3ae86d6455173c5
      https://github.com/llvm/llvm-project/commit/35af20d9e036deeed250b73fd3ae86d6455173c5
  Author: Yi Kong <yikong at google.com>
  Date:   2023-04-27 (Thu, 27 Apr 2023)

  Changed paths:
    M bolt/tools/merge-fdata/merge-fdata.cpp

  Log Message:
  -----------
  [BOLT] Parallelize legacy profile merging

Merging profiles is quite expensive, but easily paralleizable.

8359 profiles on n2d-standard-128:
single-thread: 808s
multi-thread: 200s (~75% speed up)

Differential Revision: https://reviews.llvm.org/D149014