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comparison test/test_benchmark.h @ 37:4b5a557aa64f

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*: turns out extern is a practical joke. rewrite to be always inline again the sample benchmark performs about 3x as well with optimizations disabled :)
author Paper <paper@tflc.us>
date Sat, 26 Apr 2025 01:04:35 -0400
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children f9ca85d2f14c
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36:677c03c382b8 37:4b5a557aa64f
1
2 /* ------------------------------------------------------------------------ */
3 /* simple benchmark for getting the min/max range of an audio sample. */
4
5 /* prevent GCC from optimizing these function calls away - i think there's
6 * probably a better way to do this, but I haven't found it yet :) */
7
8
9 extern void test_benchmark_sample_minmax_simple_impl(int16_t *smpl, uint32_t length, int32_t *pmin, int32_t *pmax);
10 extern void test_benchmark_sample_minmax_vec_impl(int16_t *smpl, uint32_t length, int32_t *pmin, int32_t *pmax);
11
12 VEC_FUNC_IMPL void test_benchmark_sample_minmax(void)
13 {
14 int32_t min, max;
15 clock_t start, end;
16 int i;
17 int16_t *q = vec_malloc(16000000u * 2u);
18
19 printf("\nsigned 16-bit audio sample min/max - 1 thousand passes - 16000000 samples\n\n");
20
21 /* generate random sample values */
22 for (i = 0; i < 16000000; i++)
23 q[i] = rand();
24
25 start = clock();
26 for (i = 0; i < 1000; i++) {
27 min = INT32_MAX;
28 max = INT32_MIN;
29 test_benchmark_sample_minmax_vec_impl(q, 16000000u, &min, &max);
30 }
31 end = clock();
32
33 printf("- vec: took %f secs\n", (double)(end - start) / CLOCKS_PER_SEC);
34
35 start = clock();
36 for (i = 0; i < 1000; i++) {
37 min = INT32_MAX;
38 max = INT32_MIN;
39 test_benchmark_sample_minmax_simple_impl(q, 16000000u, &min, &max);
40 }
41 end = clock();
42
43 printf("- simple: took %f secs\n", (double)(end - start) / CLOCKS_PER_SEC);
44
45 printf("\n");
46
47 vec_free(q);
48 }
49
50 static void test_benchmark(void)
51 {
52 printf("------- BENCHMARK --------\n");
53 test_benchmark_sample_minmax();
54 }