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Benchtests: Remove simple_strcspn/strpbrk/strsep

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Remove simple_strcspn/strpbrk/strsep which are significantly slower than the
generic implementations.  Also remove oldstrsep and oldstrtok since they are
practically identical to the generic implementation.  Adjust iteration count
to reduce benchmark time.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
This commit is contained in:
Wilco Dijkstra 2023-03-03 13:03:19 +00:00
parent b0e02d5b6d
commit 5de1508803
5 changed files with 4 additions and 177 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
benchtests/bench-strcspn.c
View File

@ -26,29 +26,8 @@
#endif /* WIDE */
#include "bench-string.h"
#ifndef WIDE
# define SIMPLE_STRCSPN simple_strcspn
#else
# define SIMPLE_STRCSPN simple_wcscspn
#endif /* WIDE */
typedef size_t (*proto_t) (const CHAR *, const CHAR *);
size_t SIMPLE_STRCSPN (const CHAR *, const CHAR *);
IMPL (SIMPLE_STRCSPN, 0)
IMPL (STRCSPN, 1)
size_t
SIMPLE_STRCSPN (const CHAR *s, const CHAR *rej)
{
const CHAR *r, *str = s;
CHAR c;
while ((c = *s++) != '\0')
for (r = rej; *r != '\0'; ++r)
if (*r == c)
return s - str - 1;
return s - str - 1;
}
#include "bench-strpbrk.c"

23
benchtests/bench-strpbrk.c
View File

@ -35,31 +35,10 @@
# endif /* WIDE */
# include "bench-string.h"
# ifndef WIDE
# define SIMPLE_STRPBRK simple_strpbrk
# else
# define SIMPLE_STRPBRK simple_wcspbrk
# endif /* WIDE */
typedef CHAR *(*proto_t) (const CHAR *, const CHAR *);
CHAR *SIMPLE_STRPBRK (const CHAR *, const CHAR *);
IMPL (SIMPLE_STRPBRK, 0)
IMPL (STRPBRK, 1)
CHAR *
SIMPLE_STRPBRK (const CHAR *s, const CHAR *rej)
{
const CHAR *r;
CHAR c;
while ((c = *s++) != '\0')
for (r = rej; *r != '\0'; ++r)
if (*r == c)
return (CHAR *) s - 1;
return NULL;
}
#endif /* !STRPBRK_RESULT */
#include "json-lib.h"
@ -69,7 +48,7 @@ do_one_test (json_ctx_t *json_ctx, impl_t *impl, const CHAR *s,
const CHAR *rej, RES_TYPE exp_res)
{
RES_TYPE res = CALL (impl, s, rej);
size_t i, iters = INNER_LOOP_ITERS;
size_t i, iters = INNER_LOOP_ITERS8 / CHARBYTES;
timing_t start, stop, cur;
if (res != exp_res)

78
benchtests/bench-strsep.c
View File

@ -20,90 +20,14 @@
#define TEST_NAME "strsep"
#include "bench-string.h"
char *
simple_strsep (char **s1, char *s2)
{
char *begin;
char *s;
size_t j = 0;
begin = *s1;
s = begin;
if (begin == NULL)
return NULL;
ssize_t s2len = strlen (s2);
while (*s)
{
for (j = 0; j < s2len; j++)
{
if (*s == s2[j])
{
s[0] = '\0';
*s1 = s + 1;
return begin;
}
}
s++;
}
*s1 = NULL;
return begin;
}
char *
oldstrsep (char **stringp, const char *delim)
{
char *begin, *end;
begin = *stringp;
if (begin == NULL)
return NULL;
/* A frequent case is when the delimiter string contains only one
character. Here we don't need to call the expensive `strpbrk'
function and instead work using `strchr'. */
if (delim[0] == '\0' || delim[1] == '\0')
{
char ch = delim[0];
if (ch == '\0')
end = NULL;
else
{
if (*begin == ch)
end = begin;
else if (*begin == '\0')
end = NULL;
else
end = strchr (begin + 1, ch);
}
}
else
/* Find the end of the token. */
end = strpbrk (begin, delim);
if (end)
{
/* Terminate the token and set *STRINGP past NUL character. */
*end++ = '\0';
*stringp = end;
}
else
/* No more delimiters; this is the last token. */
*stringp = NULL;
return begin;
}
typedef char *(*proto_t) (const char **, const char *);
IMPL (simple_strsep, 0)
IMPL (strsep, 1)
IMPL (oldstrsep, 2)
static void
do_one_test (impl_t * impl, const char *s1, const char *s2)
{
size_t i, iters = INNER_LOOP_ITERS_SMALL;
size_t i, iters = INNER_LOOP_ITERS;
timing_t start, stop, cur;
TIMING_NOW (start);

23
benchtests/bench-strspn.c
View File

@ -28,41 +28,20 @@
#define BIG_CHAR MAX_CHAR
#ifndef WIDE
# define SIMPLE_STRSPN simple_strspn
# define SMALL_CHAR 127
#else
# define SIMPLE_STRSPN simple_wcsspn
# define SMALL_CHAR 1273
#endif /* WIDE */
typedef size_t (*proto_t) (const CHAR *, const CHAR *);
size_t SIMPLE_STRSPN (const CHAR *, const CHAR *);
IMPL (SIMPLE_STRSPN, 0)
IMPL (STRSPN, 1)
size_t
SIMPLE_STRSPN (const CHAR *s, const CHAR *acc)
{
const CHAR *r, *str = s;
CHAR c;
while ((c = *s++) != '\0')
{
for (r = acc; *r != '\0'; ++r)
if (*r == c)
break;
if (*r == '\0')
return s - str - 1;
}
return s - str - 1;
}
static void
do_one_test (json_ctx_t *json_ctx, impl_t *impl, const CHAR *s,
const CHAR *acc, size_t exp_res)
{
size_t res = CALL (impl, s, acc), i, iters = INNER_LOOP_ITERS;
size_t res = CALL (impl, s, acc), i, iters = INNER_LOOP_ITERS8 / CHARBYTES;
timing_t start, stop, cur;
if (res != exp_res)

36
benchtests/bench-strtok.c
View File

@ -20,47 +20,14 @@
#define TEST_NAME "strtok"
#include "bench-string.h"
char *
oldstrtok (char *s, const char *delim)
{
static char *olds;
char *token;
if (s == NULL)
s = olds;
/* Scan leading delimiters. */
s += strspn (s, delim);
if (*s == '\0')
{
olds = s;
return NULL;
}
/* Find the end of the token. */
token = s;
s = strpbrk (token, delim);
if (s == NULL)
/* This token finishes the string. */
olds = strchr (token, '\0');
else
{
/* Terminate the token and make OLDS point past it. */
*s = '\0';
olds = s + 1;
}
return token;
}
typedef char *(*proto_t) (const char *, const char *);
IMPL (oldstrtok, 0)
IMPL (strtok, 1)
static void
do_one_test (impl_t * impl, const char *s1, const char *s2)
{
size_t i, iters = INNER_LOOP_ITERS_SMALL;
size_t i, iters = INNER_LOOP_ITERS_MEDIUM;
timing_t start, stop, cur;
TIMING_NOW (start);
for (i = 0; i < iters; ++i)
@ -74,7 +41,6 @@ do_one_test (impl_t * impl, const char *s1, const char *s2)
TIMING_DIFF (cur, start, stop);
TIMING_PRINT_MEAN ((double) cur, (double) iters);
}