ccore/performance/Main.c

#include <stdio.h>

#include "core/HashMap.h"
#include "core/Random.h"
#include "core/Utility.h"

static i64 testSearch(const HashMap* m) {
    i64 nanos = coreGetNanos();
    volatile int sum = 0;
    for(int i = 0; i < 10000; i++) {
        for(int k = -5000; k < 5000; k++) {
            const int* s = coreSearchTypedHashMapKey(m, int, i + k, int);
            if(s != nullptr) {
                sum = sum + *s;
            }
        }
    }
    return coreGetNanos() - nanos;
}

static i64 testEmptySearch(const HashMap* m) {
    i64 nanos = coreGetNanos();
    volatile int sum = 0;
    for(int i = 0; i < 100'000'000; i++) {
        const int* s = coreSearchTypedHashMapKey(m, int, -i, int);
        if(s != nullptr) {
            sum = sum + *s;
        }
    }
    return coreGetNanos() - nanos;
}

static void fillOrder(HashMap* m) {
    i64 nanos = coreGetNanos();
    for(int i = 0; i < 10000; i++) {
        corePutTypedHashMapPair(m, int, i, int, i* i);
    }
    printf("Fill Order: %ldns\n", coreGetNanos() - nanos);
}

static void fillChaos(HashMap* m) {
    i64 nanos = coreGetNanos();
    Random random;
    coreInitRandom(&random, 0);
    for(int i = 0; i < 10000; i++) {
        int r = coreRandomI32(&random, 0, 10000);
        corePutTypedHashMapPair(m, int, r, int, r* r);
    }
    printf("Fill Chaos: %ldns\n", coreGetNanos() - nanos);
}

static i64 average(HashMap* m, i64 (*f)(const HashMap* m), int n) {
    i64 sum = 0;
    for(int i = 0; i < n; i++) {
        sum += f(m);
    }
    return (i64)(sum / (n * 1'000'000));
}

static void order(int n) {
    HashMap m;
    coreInitHashMap(&m, sizeof(int), sizeof(int));
    fillOrder(&m);
    puts("Order Probing");
    printf("Search | %ld ms\n", average(&m, testSearch, n));
    printf("EmptySearch | %ld ms\n", average(&m, testEmptySearch, n));
    coreDestroyHashMap(&m);
}

static void chaos(int n) {
    HashMap m;
    coreInitHashMap(&m, sizeof(int), sizeof(int));
    fillChaos(&m);
    puts("Chaos Probing");
    printf("Search | %ld ms\n", average(&m, testSearch, n));
    printf("EmptySearch | %ld ms\n", average(&m, testEmptySearch, n));
    coreDestroyHashMap(&m);
}

int main() {
    order(3);
    chaos(3);
    return 0;
}