How do I make this faster?

#include <time.h>
#include <stdio.h>
#include <stdlib.h>

int myrand(int min, int max) {
int new_value;
static int previous_value;

if(min > max) return 1;

do {
srand(time(NULL));
new_value = rand() % (max - min);
} while(new_value == previous_value);

previous_value = new_value;
return new_value;
}

int main() {
for(register char c = 0; c < 5; c++) {
printf("%c\t", myrand(33, 126));
}

putchar('\n');
return 0;
}

>>13
>>14
>>16
>>25
C is the target language you soykaf plebeians.

>>15
The requirement clearly states 'How do I make this faster?'. Learn to read you Execution time is **the** requirement.

>>20
Congratulations on making a slow, non-portable pile of excrement.