Function pointer array VS switch

#include "stdio.h"
#include "stdlib.h"
#include "time.h"


void f0(int *x){
    *x += 1;
}
void f1(int *x){
    *x += 2;
}
void f2(int *x){
    *x += 3;
}
void f3(int *x){
    *x += 4;
}
void f4(int *x){
    *x += 5;
}
void f5(int *x){
    *x += 6;
}
void f6(int *x){
    *x += 7;
}
void f7(int *x){
    *x += 8;
}
void f8(int *x){
    *x += 9;
}
void f9(int *x){
    *x += 10;
}
void f10(int *x){
    *x -= 1;
}
void f11(int *x){
    *x -= 2;
}
void f12(int *x){
    *x -= 3;
}
void f13(int *x){
    *x -= 4;
}
void f14(int *x){
    *x -= 5;
}
void f15(int *x){
    *x -= 6;
}
void f16(int *x){
    *x -= 7;
}
void f17(int *x){
    *x -= 8;
}
void f18(int *x){
    *x -= 9;
}
void f19(int *x){
    *x -= 10;
}
void f20(int *x){
    *x *= 1;
}
void f21(int *x){
    *x *= 2;
}
void f22(int *x){
    *x *= 3;
}
void f23(int *x){
    *x *= 4;
}
void f24(int *x){
    *x *= 5;
}
void f25(int *x){
    *x /= 6;
}
void f26(int *x){
    *x /= 5;
}
void f27(int *x){
    *x /= 4;
}
void f28(int *x){
    *x /= 3;
}
void f29(int *x){
    *x /= 2;
}


#define TEST_ITTERATIONS 100000000

#define RAND_COUNT 2000
int randi[RAND_COUNT];
#define FUNC_COUNT 30
void (*func[])(int*) = {
    f0,f1,f2,f3,f4,f5,f6,f7,f8,f9,f10,f11,f12,f13,f14,f15,f16,f17,f18,f19,f20,f21,f22,f23,f24,f25,f26,f27,f28,f29
};

void set_rand(){
    srand (time(NULL)); // Seed random
    for (int i = 0; i < RAND_COUNT; i++){
        randi[i] = rand() % FUNC_COUNT;
    }
}

void test_pointers(){
    int x = 0;
    for (int i = 0; i < TEST_ITTERATIONS; i++){
        func[randi[i % RAND_COUNT]](&x);
    }
    printf("Pointer result: %d\n", x);
}

void test_switch(){
    int x = 0;
    for (int i = 0; i < TEST_ITTERATIONS; i++){
        switch (randi[i % RAND_COUNT]){
            case 0:
                f0(&x);
                break;
            case 1:
                f1(&x);
                break;
            case 2:
                f2(&x);
                break;
            case 3:
                f3(&x);
                break;
            case 4:
                f4(&x);
                break;
            case 5:
                f5(&x);
                break;
            case 6:
                f6(&x);
                break;
            case 7:
                f7(&x);
                break;
            case 8:
                f8(&x);
                break;
            case 9:
                f9(&x);
                break;
            case 10:
                f10(&x);
                break;
            case 11:
                f11(&x);
                break;
            case 12:
                f12(&x);
                break;
            case 13:
                f13(&x);
                break;
            case 14:
                f14(&x);
                break;
            case 15:
                f15(&x);
                break;
            case 16:
                f16(&x);
                break;
            case 17:
                f17(&x);
                break;
            case 18:
                f18(&x);
                break;
            case 19:
                f19(&x);
                break;
            case 20:
                f20(&x);
                break;
            case 21:
                f21(&x);
                break;
            case 22:
                f22(&x);
                break;
            case 23:
                f23(&x);
                break;
            case 24:
                f24(&x);
                break;
            case 25:
                f25(&x);
                break;
            case 26:
                f26(&x);
                break;
            case 27:
                f27(&x);
                break;
            case 28:
                f28(&x);
                break;
            case 29:
                f29(&x);
                break;
        }
    }
    printf("switch result: %d\n", x);
}

int main(){
    printf("Itterations: %d\n", TEST_ITTERATIONS);
    set_rand();
    float startTime;
    float endTime;
    float timeElapsed;
    startTime = (float)clock()/CLOCKS_PER_SEC;
    test_switch();
    endTime = (float)clock()/CLOCKS_PER_SEC;
    timeElapsed = endTime - startTime;
    printf("Switch time: %f\n", timeElapsed);

    startTime = (float)clock()/CLOCKS_PER_SEC;
    test_pointers();
    endTime = (float)clock()/CLOCKS_PER_SEC;
    timeElapsed = endTime - startTime;
    printf("Pointer time: %f\n", timeElapsed);
    return 0;
}