Would you say it's BOLD on steroids? Their own marketing says this:The 8% increase of Geekbench score makes me think it goes beyond code layout opimizations.

BOLT says it focuses on layout optimization only, but they were able to demonstrate 10% gains in clang compilation speed on top of PGO+LTO mix.
That's 22.61 seconds (or 12%) faster compared to the PGO+LTO build.Notice that we are measuring an improvement of the total build time, which includes the time spent in the linker.Compilation time improvements for individual files differ, and speedups over 15% are not uncommon.If we run BOLT on a Clang binary compiled without PGO+LTO (in which case the build is finished in 253.32 seconds),the gains we see are over 50 seconds (25%),but, as expected, the result is still slower than PGO+LTO+BOLT build.
llvm-project/bolt/docs/OptimizingClang.md at main · llvm/llvm-project
The LLVM Project is a collection of modular and reusable compiler and toolchain technologies. - llvm/llvm-project
Of course, I might have fixated myself on BOLT similarities but really feels to me, Intel must have at least partially used that seeing their own compiler is fork of LLVM/clang and it META developed BOLT with Intel CPU's in mind back in the day😉













