Exactly what control do we have over what gets PGOed? In particular: 1) Are we able to exclude particular object files or libraries from PGO when we link libxul, reducing PGO memory usage for the final link? I think you said "yes" on IRC.
2) Are we able to collect a set of object files, link them with PGO into a static library, and then link the result into libxul, reducing PGO memory usage for the final link? Given the answer to #1 is yes, I think it's worth going through the contents of libxul and disabling PGO on stuff that we deem unimportant. If the answer to #2 is yes, we can independently-PGO those bits to limit the perf hit. Rob -- Jesus called them together and said, “You know that the rulers of the Gentiles lord it over them, and their high officials exercise authority over them. Not so with you. Instead, whoever wants to become great among you must be your servant, and whoever wants to be first must be your slave — just as the Son of Man did not come to be served, but to serve, and to give his life as a ransom for many.” [Matthew 20:25-28] _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
