In article <20160603012159.a51b6f...@cvs.netbsd.org>, Simon J. Gerraty <source-changes-d@NetBSD.org> wrote: >-=-=-=-=-=- > >Module Name: src >Committed By: sjg >Date: Fri Jun 3 01:21:59 UTC 2016 > >Modified Files: > src/usr.bin/make: main.c make.h meta.c nonints.h var.c > >Log Message: >Add cached_realpath() > >realpath(3) is expensive, and meta mode at least uses it extensively. >We use cached_realpath() to save the result of successful calls to >realpath(3) in a private variable context. > >This improves the worst case performance (eg examining libc with >nothing to do) by a factor of 4.
I forgot to ask if it is worth it to cache the misses too... christos
