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add md5 bench

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源文雨
2022-04-18 14:57:58 +08:00
parent f14caf6e5b
commit 20353357b5
2 changed files with 114 additions and 12 deletions
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35
README.md
View File

@@ -2,6 +2,41 @@
Simple C lib of the MD5 & TEA algorithm
# Performance
Benchmark a `3.5MB` file comparing with `md5` command in `MacOS Mojave` by running three times `time` command then calculating their average.
```bash
# system command: total 22ms
real 0m0.015s
user 0m0.012s
sys 0m0.005s
# our md5 command: total 39ms
# build by
gcc md5.c -o md5 -O3 -DTEST_SIMPLE_CRYPTO
real 0m0.021s
user 0m0.013s
sys 0m0.005s
```
Our version is `17ms` slower than what system does.
Benchmark a `481.7MB` file comparing with `md5` command in `MacOS Mojave` by running three times `time` command then calculating their average.
```bash
# system command: total 2079ms
real 0m0.980s
user 0m0.964s
sys 0m0.135s
# our md5 command: total 2499ms
# build by
gcc md5.c -o md5 -O3 -DTEST_SIMPLE_CRYPTO
real 0m1.253s
user 0m1.003s
sys 0m0.243s
```
Our version is `400ms` slower than what system does.
# Install
```bash

91
md5.c
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@@ -135,7 +135,7 @@ uint8_t* md5(const uint8_t *data, size_t data_len, uint8_t digest[16]) {
// Process the message in successive 512-bit chunks:
if(data_len >= 64)
for(offset=0; offset<data_len&(~0x3f); offset += 64)
for(offset=0; offset<(data_len&(~0x3f)); offset += 64)
sum(data+offset);
// Process the last trunk of message:
@@ -174,25 +174,92 @@ uint8_t* md5(const uint8_t *data, size_t data_len, uint8_t digest[16]) {
#ifdef TEST_SIMPLE_CRYPTO
#include <stdio.h>
#include <sys/stat.h>
#include <time.h>
unsigned long get_start_ms() {
struct timespec ts;
clock_gettime(CLOCK_MONOTONIC, &ts);
return (ts.tv_sec * 1000 + ts.tv_nsec / 1000000);
}
int main(int argc, char **argv) {
char *msg;
size_t len;
int i;
FILE* fp;
uint8_t* buf;
unsigned long t1, t2;
uint8_t result[16];
struct stat statbuf;
if (argc < 2) {
printf("usage: %s 'string'\n", argv[0]);
if (argc < 3) {
printf("usage: %s [options]\n\toptions:\n\t-s string: encode a string\n\t-f file: encode a file\n\t-b file: benchmark using the file\n", argv[0]);
return 1;
}
msg = argv[1];
len = strlen(msg);
md5((uint8_t*)msg, len, result);
// display result
for (i = 0; i < 16; i++)
printf("%2.2x", result[i]);
putchar('\n');
msg = argv[2];
switch(argv[1][1]) {
case 's':
len = strlen(msg);
md5((uint8_t*)msg, len, result);
// display result
for (i = 0; i < 16; i++)
printf("%2.2x", result[i]);
putchar('\n');
break;
case 'f':
if(stat(msg, &statbuf)) {
perror("stat: ");
return 1;
}
fp = fopen(msg, "rb");
if(!fp) {
perror("fopen: ");
return 2;
}
buf = malloc(statbuf.st_size);
if(!buf) {
perror("malloc: ");
return 3;
}
if(fread(buf, statbuf.st_size, 1, fp) != 1) {
perror("fread: ");
return 4;
}
md5(buf, statbuf.st_size, result);
// display result
for (i = 0; i < 16; i++)
printf("%2.2x", result[i]);
putchar('\n');
break;
case 'b':
if(stat(msg, &statbuf)) {
perror("stat: ");
return 1;
}
fp = fopen(msg, "rb");
if(!fp) {
perror("fopen: ");
return 2;
}
buf = malloc(statbuf.st_size);
if(!buf) {
perror("malloc: ");
return 3;
}
if(fread(buf, statbuf.st_size, 1, fp) != 1) {
perror("fread: ");
return 4;
}
t1 = get_start_ms();
for(int i = 0; i < 4; i++) {
md5(buf, statbuf.st_size, result);
buf[0] = result[0];
}
t2 = get_start_ms();
printf("benchmark: %lu ms.\n", t2-t1);
break;
}
return 0;
}
#endif