[Jakob Kummerow <jkumme...@chromium.org> wrote...] > What you want is not possible.
"not possible" is a very strong phrase... perhaps "inadvisable" is more appropriate to this particular case? > JavaScript is not C. I know. > V8 is not a C compiler. I know. > Optimized compilation (not only when it triggers, but also what it does) > depends on type feedback I know. > If you hack things to start optimized compilation immediately, > then the generated optimized code > (and, therefore, the work that the optimizing compiler is doing) > will be very different from regular operation -- I know. > so much so that I'd question the usefulness of profiling it. Well, I only want to profile the JS->native compilation itself. > That said, V8 already has profiling facilities for its compilers: > look at the --hydrogen-stats and --turbo-stats flags. Is that what you want? I played around with some of the flags, esp. those with "prof", but maybe not with those yet. Thanks for the hint[s]. > in V8's world, note that for overall performance [...] three things need to > be balanced: > - time spent in the optimizing compiler > - execution speed of generated optimized code > - selecting the right functions for optimization at the right time I know. > Profiling the entire execution of a given workload has the implicit benefit > that it shows where the main bottleneck is. Agreed. > I'm not sure how useful it is to look at only one aspect in isolation. I`m trying to judge how good a job the C++ compiler did of compiling V8, so I don`t really care how good a job V8 did of compiling JS since that will not [I hope! ;-)] vary as the C++ compiler -- and, potentially, the flags given to it -- is/are varied and the V8 source code is held constant. Thanks for taking the time to write a detailed reply. Regards, Abe -- -- v8-users mailing list v8-users@googlegroups.com http://groups.google.com/group/v8-users --- You received this message because you are subscribed to the Google Groups "v8-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to v8-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
