> On Sun, Oct 9, 2011 at 13:11, Andi Kleen <a...@firstfloor.org> wrote: > > > Is it still a good idea? > > Given that you found no speedups and it introduces added complexity, I > think it's best if we revisit the idea later. I never found bytecode > reading to be a bottleneck in LTO, but perhaps Jan can comment what > the experience is with Mozilla builds.
WPA is currently about 1/3 of reading&type merging, 1/3 of streaming out and 1/3 of inlining. inlining is relatively easy to cure, so yes, streaming performance is important. The very basic streaming primitives actualy still shows top in profile along with hashing and type comparing code. I will post some updated oprofiles into Mozilla PR. Honestly I think we won't get any great speedups unless we work on reducing amount of unnecesary info we pickle/unpickle. Honza > > > Diego.
