1. 11 Jun, 2018 2 commits
  2. 13 Feb, 2018 1 commit
  3. 09 Feb, 2018 1 commit
    • Bruce Dawson's avatar
      Script to summarize performance of ninja builds · ffc0c7c6
      Bruce Dawson authored
      post_build_ninja_summary.py analyzes the .ninja_log file in an output
      directory to summarize build performance. It lists the most expensive
      build steps, and build-step types, printing both their elapsed time and,
      more importantly, their "weighted" time which is a measure of their
      contribution to the total build time.
      
      For each time segment within the build the running build steps
      accumulate weighted time that is proportional to the elapsed time
      divided by the number of tasks running. If a thousand compilation steps
      are running in parallel then they will each be "charged" for 1/1,000th
      of the elapsed time. If a single link step is running alone then it is
      charged with all of the elapsed time.
      
      Bug: chromium:787983
      Change-Id: Id5aea715f798a16415dd0365a27f0051202668e5
      Reviewed-on: https://chromium-review.googlesource.com/871988Reviewed-by: 's avatarDirk Pranke <dpranke@chromium.org>
      Reviewed-by: 's avatarErik Staab <estaab@chromium.org>
      Commit-Queue: Bruce Dawson <brucedawson@chromium.org>
      ffc0c7c6