d0e0ff01ad
This patch changes the definition of v8_optimized_debug==1 to match the release-mode compiler optimization settings (generally, going from -O1 to -O3 on Linux, similar switches for Mac/Win). This produces a minor speed up on Linux, but significant speedups on Mac and Win. This may make it much harder to debug, though. It also adds a v8_optimized_debug==2 that, in addition to the compiler optimizations, undef's DEBUG and defines DEBUG. This leaves V8_ENABLE_CHECKS alone (so that the assertions are still enabled), but otherwise basically matches a release mode build. Builds with v8_optimized_debug==2 roughly match a Release mode build for speed; the V8_ENABLE_CHECKS checks appear to have minimal performance impact (maybe 5-10%, unlike what was previously thought). In addition, switching from the previous optimization settings makes a significant improvement on Mac and Win (50% or more), and switching from DEBUG to NDEBUG makes a significant improvement (another 50% or more). Note that using v8_optimized_debug==2 may also cause some v8 tests to fail. This is currently is believed to be acceptable. R=machenbach@chromium.org BUG=254188 Review URL: https://codereview.chromium.org/19384011 Patch from Dirk Pranke <dpranke@chromium.org>. git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15937 ce2b1a6d-e550-0410-aec6-3dcde31c8c00 |
||
|---|---|---|
| .. | ||
| all.gyp | ||
| android.gypi | ||
| features.gypi | ||
| gyp_v8 | ||
| README.txt | ||
| shim_headers.gypi | ||
| standalone.gypi | ||
| toolchain.gypi | ||
For build instructions, please refer to: https://code.google.com/p/v8/wiki/BuildingWithGYP TL;DR version on *nix: $ make dependencies # Only needed once. $ make ia32.release -j8 $ make ia32.release.check # Optionally: run tests.