153 lines
3.4 KiB
C
153 lines
3.4 KiB
C
/*
|
|
* Copyright (c) 2000-2001, 2004 Sendmail, Inc. and its suppliers.
|
|
* All rights reserved.
|
|
*
|
|
* By using this file, you agree to the terms and conditions set
|
|
* forth in the LICENSE file which can be found at the top level of
|
|
* the sendmail distribution.
|
|
*/
|
|
|
|
#include <sm/gen.h>
|
|
SM_RCSID("@(#)$Id: b-strcmp.c,v 1.14 2005/06/14 23:07:20 ca Exp $")
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <sys/types.h>
|
|
#include <sm/time.h>
|
|
#include <sm/string.h>
|
|
|
|
#define toseconds(x, y) (x.tv_sec - y.tv_sec)
|
|
#define SIZE 512
|
|
#define LOOPS 4000000L /* initial number of loops */
|
|
#define MAXTIME 30L /* "maximum" time to run single test */
|
|
|
|
void fatal __P((char *));
|
|
void purpose __P((void));
|
|
int main __P((int, char *[]));
|
|
|
|
void
|
|
fatal(str)
|
|
char *str;
|
|
{
|
|
perror(str);
|
|
exit(1);
|
|
}
|
|
|
|
void
|
|
purpose()
|
|
{
|
|
printf("This program benchmarks the performance differences between\n");
|
|
printf("strcasecmp() and sm_strcasecmp().\n");
|
|
printf("These tests may take several minutes to complete.\n");
|
|
}
|
|
|
|
int
|
|
main(argc, argv)
|
|
int argc;
|
|
char *argv[];
|
|
{
|
|
long a;
|
|
int k;
|
|
bool doit = false;
|
|
long loops;
|
|
long j;
|
|
long one, two;
|
|
struct timeval t1, t2;
|
|
char src1[SIZE], src2[SIZE];
|
|
|
|
# define OPTIONS "d"
|
|
while ((k = getopt(argc, argv, OPTIONS)) != -1)
|
|
{
|
|
switch ((char) k)
|
|
{
|
|
case 'd':
|
|
doit = true;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!doit)
|
|
{
|
|
purpose();
|
|
printf("If you want to run it, specify -d as option.\n");
|
|
return 0;
|
|
}
|
|
|
|
/* Run-time comments to the user */
|
|
purpose();
|
|
printf("\n");
|
|
for (k = 0; k < 3; k++)
|
|
{
|
|
switch (k)
|
|
{
|
|
case 0:
|
|
(void) sm_strlcpy(src1, "1234567890", SIZE);
|
|
(void) sm_strlcpy(src2, "1234567890", SIZE);
|
|
break;
|
|
case 1:
|
|
(void) sm_strlcpy(src1, "1234567890", SIZE);
|
|
(void) sm_strlcpy(src2, "1234567891", SIZE);
|
|
break;
|
|
case 2:
|
|
(void) sm_strlcpy(src1, "1234567892", SIZE);
|
|
(void) sm_strlcpy(src2, "1234567891", SIZE);
|
|
break;
|
|
}
|
|
printf("Test %d: strcasecmp(%s, %s) versus sm_strcasecmp()\n",
|
|
k, src1, src2);
|
|
loops = LOOPS;
|
|
for (;;)
|
|
{
|
|
j = 0;
|
|
if (gettimeofday(&t1, NULL) < 0)
|
|
fatal("gettimeofday");
|
|
for (a = 0; a < loops; a++)
|
|
j += strcasecmp(src1, src2);
|
|
if (gettimeofday(&t2, NULL) < 0)
|
|
fatal("gettimeofday");
|
|
one = toseconds(t2, t1);
|
|
printf("\tstrcasecmp() result: %ld seconds [%ld]\n",
|
|
one, j);
|
|
|
|
j = 0;
|
|
if (gettimeofday(&t1, NULL) < 0)
|
|
fatal("gettimeofday");
|
|
for (a = 0; a < loops; a++)
|
|
j += sm_strcasecmp(src1, src2);
|
|
if (gettimeofday(&t2, NULL) < 0)
|
|
fatal("gettimeofday");
|
|
two = toseconds(t2, t1);
|
|
printf("\tsm_strcasecmp() result: %ld seconds [%ld]\n",
|
|
two, j);
|
|
|
|
if (abs(one - two) > 2)
|
|
break;
|
|
loops += loops;
|
|
if (loops < 0L || one > MAXTIME)
|
|
{
|
|
printf("\t\t** results too close: no decision\n");
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
printf("\t\t** results too close redoing test %ld times **\n",
|
|
loops);
|
|
}
|
|
}
|
|
}
|
|
|
|
printf("\n\n");
|
|
printf("Interpreting the results:\n");
|
|
printf("\tFor differences larger than 2 seconds, the lower value is\n");
|
|
printf("\tbetter and that function should be used for performance\n");
|
|
printf("\treasons.\n\n");
|
|
printf("This program will re-run the tests when the difference is\n");
|
|
printf("less than 2 seconds.\n");
|
|
printf("The result will vary depending on the compiler optimization\n"); printf("level used. Compiling the sendmail libsm library with a\n");
|
|
printf("better optimization level can change the results.\n");
|
|
return 0;
|
|
}
|