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Copy pathspeedtest_numtoa.c
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speedtest_numtoa.c
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/* needed since we compile as C90
* trick gcc to accepting snprintf which is a C99-ism
*/
#define _ISOC99_SOURCE
#define _DEFAULT_SOURCE
#define _XOPEN_SOURCE 500
#define _POSIX_C_SOURCE 200112L
#include <stdint.h>
#include <stdio.h>
#include <time.h>
#include "modp_numtoa.h"
int main(void)
{
char buf[100];
uint32_t max = 1000000;
clock_t t0, t1;
double d, last;
uint32_t i;
uint8_t ju8;
uint16_t ju16;
int8_t j8;
int16_t j16;
printf("%s", " type \tsprintf\tsnprf\tnumtoa\timprovement\n");
printf("unsigned 8\t");
t0 = clock();
for (i = 0; i < max; ++i) {
ju8 = (uint8_t)i;
sprintf(buf, "%hhu", ju8);
}
t1 = clock();
printf("%lu\t", (t1 - t0));
fflush(stdout);
t0 = clock();
for (i = 0; i < max; ++i) {
ju8 = (uint8_t)i;
snprintf(buf, sizeof(buf), "%hhu", ju8);
}
t1 = clock();
last = ((double)(t1 - t0));
printf("%lu\t", (t1 - t0));
fflush(stdout);
t0 = clock();
for (i = 0; i < max; ++i) {
ju8 = (uint8_t)i;
modp_uitoa10(ju8, buf);
}
t1 = clock();
printf("%lu\t", (t1 - t0));
printf("%.1fx\n", last / ((double)(t1 - t0)));
fflush(stdout);
printf("unsigned 16\t");
t0 = clock();
for (i = 0; i < max; ++i) {
ju16 = (uint16_t)i;
sprintf(buf, "%hu", ju16);
}
t1 = clock();
printf("%lu\t", (t1 - t0));
fflush(stdout);
t0 = clock();
for (i = 0; i < max; ++i) {
ju16 = (uint16_t)i;
snprintf(buf, sizeof(buf), "%hu", ju16);
}
t1 = clock();
last = ((double)(t1 - t0));
printf("%lu\t", (t1 - t0));
fflush(stdout);
t0 = clock();
for (i = 0; i < max; ++i) {
ju16 = (uint16_t)i;
modp_uitoa10(ju16, buf);
}
t1 = clock();
printf("%lu\t", ((t1 - t0)));
printf("%.1fx\n", last / ((double)(t1 - t0)));
fflush(stdout);
printf("unsigned 32\t");
t0 = clock();
for (i = 0; i < max; ++i) {
sprintf(buf, "%u", i);
}
t1 = clock();
printf("%lu\t", ((t1 - t0)));
fflush(stdout);
t0 = clock();
for (i = 0; i < max; ++i) {
snprintf(buf, sizeof(buf), "%u", i);
}
t1 = clock();
last = ((double)(t1 - t0));
printf("%lu\t", ((t1 - t0)));
fflush(stdout);
t0 = clock();
for (i = 0; i < max; ++i) {
modp_uitoa10(i, buf);
}
t1 = clock();
printf("%lu\t", ((t1 - t0)));
printf("%.1fx\n", last / ((double)(t1 - t0)));
fflush(stdout);
printf("signed 8\t");
t0 = clock();
for (i = 0; i < max; ++i) {
j8 = (int8_t)i;
sprintf(buf, "%hhd", j8);
}
t1 = clock();
printf("%lu\t", ((t1 - t0)));
fflush(stdout);
t0 = clock();
for (i = 0; i < max; ++i) {
j8 = (int8_t)i;
snprintf(buf, sizeof(buf), "%hhd", j8);
}
t1 = clock();
last = ((double)(t1 - t0));
printf("%lu\t", ((t1 - t0)));
fflush(stdout);
t0 = clock();
for (i = 0; i < max; ++i) {
j8 = (int8_t)i;
modp_itoa10(j8, buf);
}
t1 = clock();
printf("%lu\t", ((t1 - t0)));
printf("%.1fx\n", last / ((double)(t1 - t0)));
fflush(stdout);
printf("signed 16\t");
t0 = clock();
for (i = 0; i < max; ++i) {
j16 = (int16_t)i;
sprintf(buf, "%hd", j16);
}
t1 = clock();
printf("%lu\t", ((t1 - t0)));
fflush(stdout);
t0 = clock();
for (i = 0; i < max; ++i) {
j16 = (int16_t)i;
snprintf(buf, sizeof(buf), "%hd", j16);
}
t1 = clock();
last = ((double)(t1 - t0));
printf("%lu\t", ((t1 - t0)));
fflush(stdout);
t0 = clock();
for (i = 0; i < max; ++i) {
j16 = (int16_t)i;
modp_itoa10(j16, buf);
}
t1 = clock();
printf("%lu\t", ((t1 - t0)));
printf("%.1fx\n", last / ((double)(t1 - t0)));
fflush(stdout);
printf("%s", "signed 32\t");
fflush(stdout);
t0 = clock();
for (i = 0; i < max; ++i) {
sprintf(buf, "%d", i);
}
t1 = clock();
printf("%lu\t", ((t1 - t0)));
fflush(stdout);
t0 = clock();
for (i = 0; i < max; ++i) {
snprintf(buf, sizeof(buf), "%d", i);
}
t1 = clock();
last = ((double)(t1 - t0));
printf("%lu\t", ((t1 - t0)));
fflush(stdout);
t0 = clock();
for (i = 0; i < max; ++i) {
modp_itoa10((int32_t)i, buf);
}
t1 = clock();
printf("%lu\t", ((t1 - t0)));
printf("%.1fx\n", last / ((double)(t1 - t0)));
fflush(stdout);
/* UITOA16 */
printf("%s", "unsigned 32 hex\t");
fflush(stdout);
t0 = clock();
for (i = 0; i < max; ++i) {
sprintf(buf, "%X", i);
}
t1 = clock();
printf("%lu\t", ((t1 - t0)));
fflush(stdout);
t0 = clock();
for (i = 0; i < max; ++i) {
snprintf(buf, sizeof(buf), "%08X", i);
}
t1 = clock();
last = ((double)(t1 - t0));
printf("%lu\t", ((t1 - t0)));
fflush(stdout);
t0 = clock();
for (i = 0; i < max; ++i) {
modp_uitoa16(i, buf, 1);
}
t1 = clock();
printf("%lu\t", ((t1 - t0)));
printf("%.1fx\n", last / ((double)(t1 - t0)));
fflush(stdout);
/** FLOATING POINT **/
printf("%s", "\n type \t%e\t%f\t%g\tdtoa\timprovement\n");
printf("%s", "double\t\t");
t0 = clock();
for (i = 0; i < max; ++i) {
sprintf(buf, "%e", (double)(i));
}
t1 = clock();
printf("%lu\t", ((t1 - t0)));
fflush(stdout);
t0 = clock();
for (i = 0; i < max; ++i) {
d = (double)i + 0.1;
snprintf(buf, sizeof(buf), "%f", d);
}
t1 = clock();
printf("%lu\t", ((t1 - t0)));
fflush(stdout);
t0 = clock();
for (i = 0; i < max; ++i) {
d = (double)i + 0.123456;
snprintf(buf, sizeof(buf), "%g", d);
}
t1 = clock();
last = ((double)(t1 - t0));
printf("%lu\t", ((t1 - t0)));
fflush(stdout);
t0 = clock();
for (i = 0; i < max; ++i) {
d = (double)i + 0.123456;
modp_dtoa(d, buf, 6);
}
t1 = clock();
printf("%lu\t", ((t1 - t0)));
printf("%.1fx\n", last / ((double)(t1 - t0)));
fflush(stdout);
return 0;
}