| commit | 9e3b3ad66b468d6508a66f54ff396d89bae2d599 | [log] [tgz] |
|---|---|---|
| author | David 'Digit' Turner <digit@fuchsia.infra.roller.google.com> | Wed Jan 29 08:21:29 2025 -0800 |
| committer | Copybara-Service <copybara-worker@google.com> | Wed Jan 29 08:22:50 2025 -0800 |
| tree | 3335385c39474826adc1fd6cb0ce5746b4d7cf69 | |
| parent | ed937bd3f733129831a224e9c43ec964f3c8313d [diff] |
[roll] Roll fuchsia [build][clang] Consolidate multiple exec_script() calls into one.
Speed-up `gn gen` time drastically by removing `exec_script()`
statements calling into Clang, replacing them with lookups into the
GN scope generated by invoking a new script (generate_config_json.py)
that is only invoked once.
The script implements the same set of clang probing commands, but
launches them in parallel to speed-up the process significantly
(see CommandPool class implementation).
Note that the script is executed and parsed by GN only once in the
default toolchain, then its content passed to other GN toolchains
using `toolchain_args`.
As verified manually, this *does* not change the generated Ninja
build plan for the following variants: none, asan, ubsan, hwasan,
tsan & profile.
Benchmarking results for different build configurations with
buildbot bundles for products and e2e tests, running on a
powerful workstation:
```
before (s) after (s) diff (s)
bringup.arm64 8.76 5.07 -3.69
bringup.arm64-asan 14.62 7.23 -7.39
core.arm64 23.07 14.48 -8.59
core.arm64-asan 35.29 18.14 -17.15
Exact fx set commands:
fx set bringup.arm64 --with //bundles/buildbot/bringup:bringup --with //bundles/buildbot/bringup:e2e_tests
fx set bringup.arm64 --with //bundles/buildbot/bringup:bringup --with //bundles/buildbot/bringup:e2e_tests --variant asan
fx set core.arm64 --with //bundles/buildbot/core:core --with //bundles/buildbot/core:e2e_tests
fx set core.arm64 --with //bundles/buildbot/core:core --with //bundles/buildbot/core:e2e_tests --variant asan
```
Original-Bug: 377663596
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1177814
Original-Revision: cea5d43fc9228d3a8838229bee050dbf0f631594
GitOrigin-RevId: 09fd436f8da0a45856174a42b4375a6fe1198771
Change-Id: I3411704c7ad0d2dac14bdd83105fdd6034924138
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