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ffc0c7c691
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/871988 Reviewed-by: Dirk Pranke <dpranke@chromium.org> Reviewed-by: Erik Staab <estaab@chromium.org> Commit-Queue: Bruce Dawson <brucedawson@chromium.org>
12 lines
510 B
Batchfile
Executable File
12 lines
510 B
Batchfile
Executable File
@echo off
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:: Copyright 2017 The Chromium Authors. All rights reserved.
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:: Use of this source code is governed by a BSD-style license that can be
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:: found in the LICENSE file.
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REM Execute whatever is printed by autoninja.py.
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REM Also print it to reassure that the right settings are being used.
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FOR /f "usebackq tokens=*" %%a in (`python %~dp0autoninja.py "%*"`) do echo %%a & %%a
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@if errorlevel 1 goto buildfailure
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@if "%NINJA_SUMMARIZE_BUILD%" == "1" python %~dp0post_build_ninja_summary.py %*
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:buildfailure
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