On 15 April 2015 at 16:44, Paul Smith <psm...@gnu.org> wrote: > You could generate a > performance graph and see where make is spending its time during those > 15 seconds.
oprofile says it's spending all its time in strcache_iscached. This is called from verify_file_data_base, which is called from "die" in main.c. This is why it was spending 10 seconds *after* make had already printed "Nothing to be done". "die" only calls verify_file_data_base if verify_flag is set, which is only enabled if "-d" is set or if MAKE_MAINTAINER_MODE is set. That explains why I was only seeing it in the versions of make I had built myself from git, and not in make 3.81 from my distro. So it isn't a regression! :-) It might be worth mentioning the differences between a git build and tarball build in README.git. (As far as I can tell, this, plus enabling asserts, are the only differences.) Dave. _______________________________________________ Bug-make mailing list Bug-make@gnu.org https://lists.gnu.org/mailman/listinfo/bug-make
