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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
| commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
| tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /build/docs/pgo.rst | |
| parent | Initial commit. (diff) | |
| download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip | |
Adding upstream version 115.7.0esr.upstream/115.7.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'build/docs/pgo.rst')
| -rw-r--r-- | build/docs/pgo.rst | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/build/docs/pgo.rst b/build/docs/pgo.rst new file mode 100644 index 0000000000..722056c727 --- /dev/null +++ b/build/docs/pgo.rst @@ -0,0 +1,28 @@ +.. _pgo: + +=========================== +Profile Guided Optimization +=========================== + +:abbr:`PGO (Profile Guided Optimization)` is the process of adding +probes to a compiled binary, running said binary, then using the +run-time information to *recompile* the binary to (hopefully) make it +faster. + +How PGO Builds Work +=================== + +The supported interface for invoking a PGO build is to add ``MOZ_PGO=1`` to +configure flags and then build. e.g. in your mozconfig:: + + ac_add_options MOZ_PGO=1 + +Then:: + + $ ./mach build + +This is roughly equivalent to:: + +#. Perform a build with *--enable-profile-generate* in $topobjdir/instrumented +#. Perform a run of the instrumented binaries with build/pgo/profileserver.py +#. Perform a build with *--enable-profile-use* in $topobjdir |