// time ./realloc_speed_test_c 50000 10000 100000 #include #include #include #include "xmalloc.h" int main(int argc, char *argv[]) { if (argc != 4) { fputs("Usage: realloc_speed_test_cpp iterations nobj maxsz\n", stderr); exit(-1); } size_t iterations = (size_t)atoi(argv[1]); size_t nobj = (size_t)atoi(argv[2]); size_t maxsz = (size_t)atoi(argv[3]); void **p = malloc(sizeof(void *) * nobj); memset(p, 0, sizeof(void *) * nobj); size_t i, idx, sz; for (i = 0; i < iterations; i++) { idx = (size_t)(rand() % (int)nobj); sz = i;//(size_t)(rand() % (int)maxsz); p[idx] = realloc(p[idx], sz); if (sz && !p[idx]) { fprintf(stderr, "Alloc error at i = %lu\n", i); exit(-1); } } for (i = 0; i < nobj; i++) free(p[i]); free(p); printf("Success, iterations = %lu, nobj = %lu, maxsz = %lu\n", iterations, nobj, maxsz); return EXIT_SUCCESS; }