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change from upstream to speed up by skipping unused globs
https://bugs.gentoo.org/382845
http://cvs.savannah.gnu.org/viewvc/make/read.c?root=make&r1=1.198&r2=1.200
Revision 1.200
Sat May 7 14:36:12 2011 UTC (4 months, 1 week ago) by psmith
Branch: MAIN
Changes since 1.199: +1 -1 lines
Inverted the boolean test from what I wanted it to be. Added a
regression test to make sure this continues to work.
Revision 1.199
Mon May 2 00:18:06 2011 UTC (4 months, 2 weeks ago) by psmith
Branch: MAIN
Changes since 1.198: +35 -25 lines
Avoid invoking glob() unless the filename has potential globbing
characters in it, for performance improvements.
--- a/read.c 2011/04/29 15:27:39 1.198
+++ b/read.c 2011/05/07 14:36:12 1.200
@@ -2901,6 +2901,7 @@
const char *name;
const char **nlist = 0;
char *tildep = 0;
+ int globme = 1;
#ifndef NO_ARCHIVES
char *arname = 0;
char *memname = 0;
@@ -3109,32 +3110,40 @@
}
#endif /* !NO_ARCHIVES */
- switch (glob (name, GLOB_NOSORT|GLOB_ALTDIRFUNC, NULL, &gl))
- {
- case GLOB_NOSPACE:
- fatal (NILF, _("virtual memory exhausted"));
-
- case 0:
- /* Success. */
- i = gl.gl_pathc;
- nlist = (const char **)gl.gl_pathv;
- break;
-
- case GLOB_NOMATCH:
- /* If we want only existing items, skip this one. */
- if (flags & PARSEFS_EXISTS)
- {
- i = 0;
- break;
- }
- /* FALLTHROUGH */
-
- default:
- /* By default keep this name. */
+ /* glob() is expensive: don't call it unless we need to. */
+ if (!(flags & PARSEFS_EXISTS) && strpbrk (name, "?*[") == NULL)
+ {
+ globme = 0;
i = 1;
nlist = &name;
- break;
- }
+ }
+ else
+ switch (glob (name, GLOB_NOSORT|GLOB_ALTDIRFUNC, NULL, &gl))
+ {
+ case GLOB_NOSPACE:
+ fatal (NILF, _("virtual memory exhausted"));
+
+ case 0:
+ /* Success. */
+ i = gl.gl_pathc;
+ nlist = (const char **)gl.gl_pathv;
+ break;
+
+ case GLOB_NOMATCH:
+ /* If we want only existing items, skip this one. */
+ if (flags & PARSEFS_EXISTS)
+ {
+ i = 0;
+ break;
+ }
+ /* FALLTHROUGH */
+
+ default:
+ /* By default keep this name. */
+ i = 1;
+ nlist = &name;
+ break;
+ }
/* For each matched element, add it to the list. */
while (i-- > 0)
@@ -3174,7 +3183,8 @@
#endif /* !NO_ARCHIVES */
NEWELT (concat (2, prefix, nlist[i]));
- globfree (&gl);
+ if (globme)
+ globfree (&gl);
#ifndef NO_ARCHIVES
if (arname)
|
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