diff test/test_benchmark.h @ 37:4b5a557aa64f

*: 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
parents
children f9ca85d2f14c
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/test_benchmark.h	Sat Apr 26 01:04:35 2025 -0400
@@ -0,0 +1,54 @@
+
+/* ------------------------------------------------------------------------ */
+/* simple benchmark for getting the min/max range of an audio sample. */
+
+/* prevent GCC from optimizing these function calls away - i think there's
+ * probably a better way to do this, but I haven't found it yet :) */
+
+
+extern void test_benchmark_sample_minmax_simple_impl(int16_t *smpl, uint32_t length, int32_t *pmin, int32_t *pmax);
+extern void test_benchmark_sample_minmax_vec_impl(int16_t *smpl, uint32_t length, int32_t *pmin, int32_t *pmax);
+
+VEC_FUNC_IMPL void test_benchmark_sample_minmax(void)
+{
+	int32_t min, max;
+	clock_t start, end;
+	int i;
+	int16_t *q = vec_malloc(16000000u * 2u);
+
+	printf("\nsigned 16-bit audio sample min/max - 1 thousand passes - 16000000 samples\n\n");
+
+	/* generate random sample values */
+	for (i = 0; i < 16000000; i++)
+		q[i] = rand();
+
+	start = clock();
+	for (i = 0; i < 1000; i++) {
+		min = INT32_MAX;
+		max = INT32_MIN;
+		test_benchmark_sample_minmax_vec_impl(q, 16000000u, &min, &max);
+	}
+	end = clock();
+
+	printf("- vec: took %f secs\n", (double)(end - start) / CLOCKS_PER_SEC);
+
+	start = clock();
+	for (i = 0; i < 1000; i++) {
+		min = INT32_MAX;
+		max = INT32_MIN;
+		test_benchmark_sample_minmax_simple_impl(q, 16000000u, &min, &max);
+	}
+	end = clock();
+
+	printf("- simple: took %f secs\n", (double)(end - start) / CLOCKS_PER_SEC);
+
+	printf("\n");
+
+	vec_free(q);
+}
+
+static void test_benchmark(void)
+{
+	printf("------- BENCHMARK --------\n");
+	test_benchmark_sample_minmax();
+}