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[3.11] gh-91795: Update build optimization part of PCbuild/readme.txt (GH-91849) #107777

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Merged
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Aug 16, 2023
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[3.11] gh-91795: Update build optimization part of PCbuild/readme.txt (GH-91849) #107777

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8 changes: 5 additions & 3 deletions PCbuild/readme.txt
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Expand Up @@ -250,9 +250,11 @@ against a profiling library and contain extra debug information. The
PGUpdate configuration takes the profiling data and generates optimized
binaries.

The build_pgo.bat script automates the creation of optimized binaries.
It creates the PGI files, runs the unit test suite or PyBench with the
PGI python, and finally creates the optimized files.
The build.bat script has an argument `--pgo` that automate the creation
of optimized binaries.
It creates the PGI files, runs the unit test suite with the PGI python,
and finally creates the optimized files.
You can customize the job for profiling with `--pgo-job <job>` option.

See
https://docs.microsoft.com/en-us/cpp/build/profile-guided-optimizations
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