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Diffstat (limited to 'docs/performance/build_metrics/build_metrics.md')
| -rw-r--r-- | docs/performance/build_metrics/build_metrics.md | 31 |
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diff --git a/docs/performance/build_metrics/build_metrics.md b/docs/performance/build_metrics/build_metrics.md new file mode 100644 index 0000000000..cb27a42be7 --- /dev/null +++ b/docs/performance/build_metrics/build_metrics.md @@ -0,0 +1,31 @@ +# Build Metrics + +**Build Metrics** is a catch-all term for performance measures that are +generated by the Firefox build system and tracked by Perfherder. + +## num_constructors + +Number of static constructors found by the compiler in the Firefox C++ +codebase. Lower is better. Static constructors are undesirable because +their initialization imposes an unavoidable time penalty every time +Firefox is started. + +## installer size + +Size in bytes of the Firefox installer. Lower is better here, especially +on space-restricted platforms like Android. + +## build times + +Amount of time it takes to build Firefox in automation on a specific +platform / configuration. Lower is better. + +## compiler warnings + +Number of compiler warnings detected during a build. Lower is better. + +Due to the way the build system works, compiler warnings are not +consistently detected. So the value may fluctuate from build to build +even if the number of compiler warnings didn\'t actually change. Since +Perfherder alerts are calculated based on the mean value of a range, a +regression may be reported as a fractional value. |