On Sat, Jun 12, 2021 at 01:56:41PM -0700, Bill Wendling wrote: > For example, Fangrui gave you numbers, and you rejected them out of > hand. I've explained to you why instrumentation is better than > sampling (at least for clang). Fangrui gave you numbers. Let's move on > to something else. I did not dismiss them; I asked for clarification. I would like to understand what exactly is missed by sampling based PGO data that makes such a difference.