LLVM BOLT Optimizations Net ~6% Improvement For GNOME's Pango

BOLT that was upstreamed into LLVM in 2022 by Facebook/Meta allows for optimizing the layout of binaries as a post-linking step to yield increased performance. BOLT like Profile Guided Optimizations (PGO) first requires the profiling step to generate perf recordings to feedback in for the optimization process, but the gains can be significant...