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
This commit is contained in:
tg
parent
798cfdc982
commit
4778a2a62f
5
Build.sh
5
Build.sh
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@ -1,5 +1,5 @@
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#!/bin/sh
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srcversion='$MirOS: src/bin/mksh/Build.sh,v 1.578 2012/07/01 15:51:24 tg Exp $'
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srcversion='$MirOS: src/bin/mksh/Build.sh,v 1.579 2012/07/01 15:54:49 tg Exp $'
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#-
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# Copyright (c) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
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# 2011, 2012
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@ -1486,7 +1486,7 @@ else
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#define EXTERN
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#define MKSH_INCLUDES_ONLY
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#include "sh.h"
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__RCSID("$MirOS: src/bin/mksh/Build.sh,v 1.578 2012/07/01 15:51:24 tg Exp $");
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__RCSID("$MirOS: src/bin/mksh/Build.sh,v 1.579 2012/07/01 15:54:49 tg Exp $");
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int main(void) { printf("Hello, World!\n"); return (0); }
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EOF
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case $cm in
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@ -2285,6 +2285,7 @@ MKSH_NO_LIMITS omit ulimit code
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MKSH_NO_SIGSETJMP define if sigsetjmp is broken or not available
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MKSH_NO_SIGSUSPEND use sigprocmask+pause instead of sigsuspend
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MKSH_SMALL omit some code, optimise hard for size (slower)
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MKSH_SMALL_BUT_FAST disable some hard-for-size optim. (modern sys.)
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MKSH_S_NOVI=1 disable Vi editing mode (default if MKSH_SMALL)
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MKSH_TYPEDEF_SIG_ATOMIC_T define to e.g. 'int' if sig_atomic_t is missing
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MKSH_TYPEDEF_SSIZE_T define to e.g. 'long' if your OS has no ssize_t
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6
check.t
6
check.t
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@ -1,4 +1,4 @@
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# $MirOS: src/bin/mksh/check.t,v 1.549 2012/06/28 20:17:35 tg Exp $
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# $MirOS: src/bin/mksh/check.t,v 1.550 2012/07/01 15:54:51 tg Exp $
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# $OpenBSD: bksl-nl.t,v 1.2 2001/01/28 23:04:56 niklas Exp $
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# $OpenBSD: history.t,v 1.5 2001/01/28 23:04:56 niklas Exp $
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# $OpenBSD: read.t,v 1.3 2003/03/10 03:48:16 david Exp $
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@ -29,7 +29,7 @@
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# http://www.freebsd.org/cgi/cvsweb.cgi/src/tools/regression/bin/test/regress.sh?rev=HEAD
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expected-stdout:
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@(#)MIRBSD KSH R40 2012/06/28
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@(#)MIRBSD KSH R40 2012/07/01
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description:
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Check version of shell.
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stdin:
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@ -38,7 +38,7 @@ name: KSH_VERSION
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category: shell:legacy-no
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---
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expected-stdout:
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@(#)LEGACY KSH R40 2012/06/28
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@(#)LEGACY KSH R40 2012/07/01
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description:
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Check version of legacy shell.
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stdin:
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4
edit.c
4
edit.c
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@ -28,7 +28,7 @@
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#ifndef MKSH_NO_CMDLINE_EDITING
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__RCSID("$MirOS: src/bin/mksh/edit.c,v 1.238 2012/07/01 15:36:18 tg Exp $");
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__RCSID("$MirOS: src/bin/mksh/edit.c,v 1.239 2012/07/01 15:54:53 tg Exp $");
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/*
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* in later versions we might use libtermcap for this, but since external
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@ -88,7 +88,7 @@ static int x_vi(char *, size_t);
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#endif
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#define x_flush() shf_flush(shl_out)
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#ifdef MKSH_SMALL
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#if defined(MKSH_SMALL) && !defined(MKSH_SMALL_BUT_FAST)
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#define x_putc(c) x_putcf(c)
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#else
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#define x_putc(c) shf_putc((c), shl_out)
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4
lex.c
4
lex.c
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@ -23,7 +23,7 @@
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#include "sh.h"
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__RCSID("$MirOS: src/bin/mksh/lex.c,v 1.164 2012/06/28 20:05:07 tg Exp $");
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__RCSID("$MirOS: src/bin/mksh/lex.c,v 1.165 2012/07/01 15:54:55 tg Exp $");
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/*
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* states while lexing word
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@ -131,7 +131,7 @@ short subshell_nesting_level = 0;
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return (cev); \
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}
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#ifdef MKSH_SMALL
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#if defined(MKSH_SMALL) && !defined(MKSH_SMALL_BUT_FAST)
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static int getsc(void);
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static int
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4
misc.c
4
misc.c
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@ -30,7 +30,7 @@
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#include <grp.h>
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#endif
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__RCSID("$MirOS: src/bin/mksh/misc.c,v 1.194 2012/06/26 19:22:19 tg Exp $");
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__RCSID("$MirOS: src/bin/mksh/misc.c,v 1.195 2012/07/01 15:54:56 tg Exp $");
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#define KSH_CHVT_FLAG
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#ifdef MKSH_SMALL
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@ -2006,7 +2006,7 @@ strstr(char *b, const char *l)
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}
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#endif
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#ifdef MKSH_SMALL
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#if defined(MKSH_SMALL) && !defined(MKSH_SMALL_BUT_FAST)
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char *
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strndup_i(const char *src, size_t len, Area *ap)
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{
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10
sh.h
10
sh.h
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@ -157,9 +157,9 @@
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#endif
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#ifdef EXTERN
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__RCSID("$MirOS: src/bin/mksh/sh.h,v 1.571 2012/07/01 15:44:31 tg Exp $");
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__RCSID("$MirOS: src/bin/mksh/sh.h,v 1.572 2012/07/01 15:54:57 tg Exp $");
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#endif
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#define MKSH_VERSION "R40 2012/06/28"
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#define MKSH_VERSION "R40 2012/07/01"
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/* arithmetic types: C implementation */
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#if !HAVE_CAN_INTTYPES
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@ -498,7 +498,7 @@ im_sorry_dave(void)
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(dst) = (src) + utf_ptradj(src); \
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} while (/* CONSTCOND */ 0)
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#ifdef MKSH_SMALL
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#if defined(MKSH_SMALL) && !defined(MKSH_SMALL_BUT_FAST)
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#define strdupx(d, s, ap) do { \
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(d) = strdup_i((s), (ap)); \
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} while (/* CONSTCOND */ 0)
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@ -1859,7 +1859,7 @@ char *do_realpath(const char *);
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void simplify_path(char *);
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void set_current_wd(const char *);
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int c_cd(const char **);
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#ifdef MKSH_SMALL
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#if defined(MKSH_SMALL) && !defined(MKSH_SMALL_BUT_FAST)
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char *strdup_i(const char *, Area *);
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char *strndup_i(const char *, size_t, Area *);
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#endif
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@ -1877,7 +1877,7 @@ ssize_t shf_read(char *, ssize_t, struct shf *);
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char *shf_getse(char *, ssize_t, struct shf *);
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int shf_getchar(struct shf *s);
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int shf_ungetc(int, struct shf *);
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#ifdef MKSH_SMALL
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#if defined(MKSH_SMALL) && !defined(MKSH_SMALL_BUT_FAST)
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int shf_getc(struct shf *);
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int shf_putc(int, struct shf *);
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#else
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4
shf.c
4
shf.c
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@ -24,7 +24,7 @@
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#include "sh.h"
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__RCSID("$MirOS: src/bin/mksh/shf.c,v 1.45 2011/10/25 22:36:38 tg Exp $");
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__RCSID("$MirOS: src/bin/mksh/shf.c,v 1.46 2012/07/01 15:55:00 tg Exp $");
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/* flags to shf_emptybuf() */
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#define EB_READSW 0x01 /* about to switch to reading */
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@ -1042,7 +1042,7 @@ shf_vfprintf(struct shf *shf, const char *fmt, va_list args)
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return (shf_error(shf) ? EOF : nwritten);
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}
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#ifdef MKSH_SMALL
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#if defined(MKSH_SMALL) && !defined(MKSH_SMALL_BUT_FAST)
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int
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shf_getc(struct shf *shf)
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{
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