Attached the source of my benchmark program in case anyone wants to
have a look at it.
--
Francois Gouget [EMAIL PROTECTED] http://fgouget.free.fr/
We are Pentium of Borg. You will be approximated. Division is futile.
#include <stdio.h>
#include <stdlib.h>
#include <sys/time.h>
#include <time.h>
static char pattern[]="qwertyuiopoasdfhgjklzxcvnbmn";
static char filename[]="Filename.txt";
static char extension[]="rej";
char* mystrcpy(char* dst,char* src)
{
char* d=dst;
while (*src) *d++=*src++;
*d='\0';
return dst;
}
char* mystrcat(char* dst,char* src)
{
char* d=dst;
while (*d!='\0') d++;
while (*src!='\0') *d++=*src++;
*d='\0';
return dst;
}
char* cpycat(char* dst,char* src)
{
while (*src!='\0') *dst++=*src++;
*dst='\0';
return dst;
}
int main(int argc, char** argv)
{
int len;
char* path;
char* buf;
char* b;
int i;
struct timeval start,stop;
int elapsed;
if (argc!=2) {
fprintf(stderr,"Usage: sprintf length\n");
return 2;
}
len=atoi(argv[1]);
if (len==-1) {
fprintf(stderr,"bad length\n");
return 1;
}
path=malloc(len+1);
buf=malloc(len+1+100+1);
for (i=0;i<len;i++)
{
path[i]=pattern[i % (sizeof(pattern)-1)];
}
path[len]='\0';
printf("len=%d\n",strlen(path));
/***** The 3 strings case *****/
printf("3 strings case\n");
/* Test sprintf */
for (i=0;i<10;i++) { /* warm up */
sprintf(buf,"%s/%s",path,filename);
}
gettimeofday(&start,NULL);
for (i=0;i<50000;i++) {
sprintf(buf,"%s/%s",path,filename);
}
gettimeofday(&stop,NULL);
elapsed=(stop.tv_sec-start.tv_sec)*1000000+(stop.tv_usec-start.tv_usec);
printf("sprintf: elapsed=%5d\n",elapsed);
/* Test strcat */
for (i=0;i<10;i++) { /* warm up */
strcpy(buf,path);
strcat(buf,"/");
strcat(buf,filename);
}
gettimeofday(&start,NULL);
for (i=0;i<50000;i++) {
strcpy(buf,path);
strcat(buf,"/");
strcat(buf,filename);
}
gettimeofday(&stop,NULL);
elapsed=(stop.tv_sec-start.tv_sec)*1000000+(stop.tv_usec-start.tv_usec);
printf("strcat: elapsed=%5d\n",elapsed);
/* Test mystrcat */
for (i=0;i<10;i++) { /* warm up */
mystrcpy(buf,path);
mystrcat(buf,"/");
mystrcat(buf,filename);
}
gettimeofday(&start,NULL);
for (i=0;i<50000;i++) {
mystrcpy(buf,path);
mystrcat(buf,"/");
mystrcat(buf,filename);
}
gettimeofday(&stop,NULL);
elapsed=(stop.tv_sec-start.tv_sec)*1000000+(stop.tv_usec-start.tv_usec);
printf("mystrcat: elapsed=%5d\n",elapsed);
/* Test cpycat */
for (i=0;i<10;i++) { /* warm up */
b=buf;
b=cpycat(b,path);
b=cpycat(b,"/");
b=cpycat(b,filename);
}
gettimeofday(&start,NULL);
for (i=0;i<50000;i++) {
b=buf;
b=cpycat(b,path);
b=cpycat(b,"/");
b=cpycat(b,filename);
}
gettimeofday(&stop,NULL);
elapsed=(stop.tv_sec-start.tv_sec)*1000000+(stop.tv_usec-start.tv_usec);
printf("cpycat: elapsed=%5d\n",elapsed);
/***** The 5 strings case *****/
printf("5 strings case\n");
/* Test sprintf */
for (i=0;i<10;i++) { /* warm up */
sprintf(buf,"%s/%s.%s",path,filename,extension);
}
gettimeofday(&start,NULL);
for (i=0;i<50000;i++) {
sprintf(buf,"%s/%s.%s",path,filename,extension);
}
gettimeofday(&stop,NULL);
elapsed=(stop.tv_sec-start.tv_sec)*1000000+(stop.tv_usec-start.tv_usec);
printf("sprintf: elapsed=%5d\n",elapsed);
/* Test strcat */
for (i=0;i<10;i++) { /* warm up */
strcpy(buf,path);
strcat(buf,"/");
strcat(buf,filename);
strcat(buf,".");
strcat(buf,extension);
}
gettimeofday(&start,NULL);
for (i=0;i<50000;i++) {
strcpy(buf,path);
strcat(buf,"/");
strcat(buf,filename);
strcat(buf,".");
strcat(buf,extension);
}
gettimeofday(&stop,NULL);
elapsed=(stop.tv_sec-start.tv_sec)*1000000+(stop.tv_usec-start.tv_usec);
printf("strcat: elapsed=%5d\n",elapsed);
/* Test mystrcat */
for (i=0;i<10;i++) { /* warm up */
mystrcpy(buf,path);
mystrcat(buf,"/");
mystrcat(buf,filename);
mystrcat(buf,".");
mystrcat(buf,extension);
}
gettimeofday(&start,NULL);
for (i=0;i<50000;i++) {
mystrcpy(buf,path);
mystrcat(buf,"/");
mystrcat(buf,filename);
mystrcat(buf,".");
mystrcat(buf,extension);
}
gettimeofday(&stop,NULL);
elapsed=(stop.tv_sec-start.tv_sec)*1000000+(stop.tv_usec-start.tv_usec);
printf("mystrcat: elapsed=%5d\n",elapsed);
/* Test cpycat */
for (i=0;i<10;i++) { /* warm up */
b=buf;
b=cpycat(b,path);
b=cpycat(b,"/");
b=cpycat(b,filename);
b=cpycat(b,".");
b=cpycat(b,extension);
}
gettimeofday(&start,NULL);
for (i=0;i<50000;i++) {
b=buf;
b=cpycat(b,path);
b=cpycat(b,"/");
b=cpycat(b,filename);
b=cpycat(b,".");
b=cpycat(b,extension);
}
gettimeofday(&stop,NULL);
elapsed=(stop.tv_sec-start.tv_sec)*1000000+(stop.tv_usec-start.tv_usec);
printf("cpycat: elapsed=%5d\n",elapsed);
return 0;
}
