444d2e1a54
We tested the stale profile matching on several Meta's internal services, all results are positive, for instance, in one service that refreshed its profile every one or two weeks, it consistently gave 1~2% performance improvement. We also observed an instance that a trivial refactoring caused a 2% regression and the matching can successfully recover the whole regression. Therefore, we'd like to turn it on by default for CSSPGO. Reviewed By: hoy, wenlei Differential Revision: https://reviews.llvm.org/D154027
106 KiB
106 KiB