JehanneOS/mksh
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lesson learned from http://k1024.org/~iusty/blog/entry/perf-null/ – add -DMKSH_SMALL_BUT_FAST which gives more speed (8/20K less cycles, 5/9K less insns, 1.8/2.4k less branches, 65/275 less branch misses) on Debian/amd64 (klibc-static/eglibc) at cost of 0/2 more page faults and 6K/6K more text size

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tg
2012-07-01 15:55:00 +00:00
parent 798cfdc982
commit 4778a2a62f
7 changed files with 19 additions and 18 deletions
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4
shf.c
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@@ -24,7 +24,7 @@
#include "sh.h"
__RCSID("$MirOS: src/bin/mksh/shf.c,v 1.45 2011/10/25 22:36:38 tg Exp $");
__RCSID("$MirOS: src/bin/mksh/shf.c,v 1.46 2012/07/01 15:55:00 tg Exp $");
/* flags to shf_emptybuf() */
#define EB_READSW 0x01 /* about to switch to reading */
@@ -1042,7 +1042,7 @@ shf_vfprintf(struct shf *shf, const char *fmt, va_list args)
return (shf_error(shf) ? EOF : nwritten);
}
#ifdef MKSH_SMALL
#if defined(MKSH_SMALL) && !defined(MKSH_SMALL_BUT_FAST)
int
shf_getc(struct shf *shf)
{