3 files changed, 76 insertions(+), 0 deletions(-)

A posix/benchmark/main.c
A posix/benchmark/meson.build
M posix/meson.build

@@ 0,0 1,56 @@
+#include "app.h"
+#include <stdint.h>
+#include <stdio.h>
+#include <time.h>
+#define run(fn) bm_run(#fn, fn)
+
+static void
+benchmark_app_proc(uint32_t iterations)
+{
+	struct app app;
+	app_init(&app);
+
+	for (uint32_t i = 0; i < iterations; i++) {
+		app_proc(&app);
+	}
+}
+
+static float
+clock_now()
+{
+	struct timespec now = {0};
+	clock_gettime(CLOCK_THREAD_CPUTIME_ID, &now);
+	return now.tv_sec + (float)now.tv_nsec / 1e9f;
+}
+
+static void
+bm_report(const char *name, uint32_t iterations, float duration)
+{
+	printf("%s: %e s/call %e calls/s\n", name, duration/iterations,
+		iterations/duration);
+}
+
+static void
+bm_run(const char *name, void (*func)(uint32_t iterations))
+{
+	const float goal_duration = 1;
+
+	for (uint32_t n = 1; n < 1000000000; n = 3*(n+1)/2) {
+		const float start = clock_now();
+		func(n);
+		const float end = clock_now();
+		const float duration = end - start;
+
+		if (duration > goal_duration) {
+			bm_report(name, n, duration);
+			return;
+		}
+	}
+}
+
+int
+main(void)
+{
+	run(benchmark_app_proc);
+	return 0;
+}

@@ 0,0 1,19 @@
+benchmark = executable(
+	'benchmark-pure',
+	sources: files(
+		'main.c',
+	),
+	c_args: flags_posix,
+	dependencies: [
+		libm,
+	],
+	link_with: [
+		pure,
+	],
+	include_directories: [
+		pure_inc,
+	],
+	native: true,
+)
+
+benchmark('benchmark-pure', benchmark)

@@ 4,5 4,6 @@ flags_posix = [
 	'-D_POSIX_C_SOURCE=200809L',
 ]
 subdir('app')
+subdir('benchmark')
 subdir('table-generator')
 subdir('test')