mimalloc

[jason1987d]

• mimalloc: update to 3.3.2.
• ART: revbump for mimalloc update build.
• MoarVM: revbump for mimalloc update build.
• mold: revbump for mimalloc update build.
• rakudo: revbump for mimalloc update build.
• nqp: revbump for mimalloc update build.

Testing the changes

• I tested the changes in this PR: YES

Local build testing

• I built this PR locally for my native architecture, x86_64-libc

How I tested this code:

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

#include <mimalloc.h>

#ifndef N
#define N 10000000   // number of allocations
#endif

#ifndef SIZE
#define SIZE 64       // bytes per allocation
#endif

// to compile:
// gcc test_mimalloc.c -O2 -o test_mimalloc -lmimalloc

static double now_sec() {
    struct timespec ts;
    clock_gettime(CLOCK_MONOTONIC, &ts);
    return ts.tv_sec + ts.tv_nsec * 1e-9;
}

static void run_test(const char* name, int use_mimalloc) {
    void** ptrs = malloc(sizeof(void*) * N);

    double start = now_sec();

    for (int i = 0; i < N; i++) {
        if (use_mimalloc)
            ptrs[i] = mi_malloc(SIZE);
        else
            ptrs[i] = malloc(SIZE);

        // touch memory to avoid lazy effects
        memset(ptrs[i], i & 0xFF, SIZE);
    }

    for (int i = 0; i < N; i++) {
        if (use_mimalloc)
            mi_free(ptrs[i]);
        else
            free(ptrs[i]);
    }

    double end = now_sec();

    printf("%s: %.3f sec (%d allocs of %d bytes)\n",
           name, end - start, N, SIZE);

    free(ptrs);
}

int main() {
    printf("Mimalloc benchmark\n");
    printf("N=%d SIZE=%d bytes\n\n", N, SIZE);

    run_test("mimalloc", 1);

    return 0;
}