On Sat, Aug 03, 2013 at 04:47:29PM +0900, Mike Hommey wrote: > On Sat, Aug 03, 2013 at 01:36:15PM +1000, Nicholas Nethercote wrote: > (...) > > Even worse, link times are through the roof. I was thrilled when, two > > years ago, I switched from ld to gold and linking time plummeted. The > > first link after rebooting was always slow, but I could link libxul > > back then in about 9 seconds. I haven't measured recently but I'm > > certain it's now *much* higher. Even the JS shell, which used to take > > hardly any time to link, now takes 10s or more; enough that I often > > switch to doing something else while waiting. > > The JS engine, having grown to be a lot of C++ instead of being mainly > C, also saw its debugging info (DWARF) grow significantly. FWIW, the > debug info .so for libmozjs.so at the time of Firefox 15 was 69MB on > Linux64, it is 129MB in Firefox 22. More debug info means link time > increase, and suggests build increase too (if debug info is bigger, it > means either code is bigger, or code is more complex ; or both) > > > If I could speed up any part of the builds, it would be linking. > > Waiting a long time to test a one file change sucks. > > If you're on linux, you can try --enable-debug-symbols=-gsplit-dwarf.
For those who would want to try it at home, note this doesn't work well with ccache: https://bugzilla.samba.org/show_bug.cgi?id=10005 Mike _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
