Packages describing “pgo” as local USE flag

Package“pgo” Flag Description
app-arch/xz-utilsOptimize the build using Profile Guided Optimization (PGO)
app-shells/bashOptimize the build using Profile Guided Optimization (PGO)
dev-lang/gnat-gplBuild GCC using Profile Guided Optimization (PGO)
dev-lang/pythonOptimize the build using Profile Guided Optimization (PGO) by running Python's test suite and collecting statistics based on its performance. This will take longer to build.
dev-lang/swi-prologOptimize the build using Profile Guided Optimization (PGO)
mail-client/thunderbirdAdd support for profile-guided optimization using gcc-4.5, for faster binaries. This option will double the compile time.
sys-devel/binutilsBuild binutils with Profile Guided Optimization (PGO) and LTO
sys-devel/binutils-hppa64Build binutils with Profile Guided Optimization (PGO) and LTO
sys-devel/gccBuild GCC using Profile Guided Optimization (PGO). GCC will build itself and then analyze the just-built binary and then rebuild itself using the data obtained from analysis of codepaths taken. It does not affect whether GCC itself supports PGO when building other software. This substantially increases the build time needed for building GCC itself.
www-client/chromiumBuild with Profile Guided Optimizations (2-stage compilation)
www-client/firefoxAdd support for profile-guided optimization for faster binaries - this option will double the compile time

All packages providing a “pgo” USE flag (11)