CVS commit: src/usr.bin/make

["Simon J. Gerraty" <sjg%netbsd.org@localhost>]

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.

Reviewed by: christos


To generate a diff of this commit:
cvs rdiff -u -r1.244 -r1.245 src/usr.bin/make/main.c
cvs rdiff -u -r1.98 -r1.99 src/usr.bin/make/make.h
cvs rdiff -u -r1.58 -r1.59 src/usr.bin/make/meta.c
cvs rdiff -u -r1.72 -r1.73 src/usr.bin/make/nonints.h
cvs rdiff -u -r1.207 -r1.208 src/usr.bin/make/var.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.