From 067ba55add258ab03db328234168af66c4ad87c3 Mon Sep 17 00:00:00 2001
From: Sebastiano Tronto <sebastiano@tronto.net>
Date: Fri, 10 Nov 2023 17:07:42 +0100
Subject: Towards a definitve API

---
 old/benchmark/bench.c | 83 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 old/benchmark/bench.c

(limited to 'old/benchmark/bench.c')

diff --git a/old/benchmark/bench.c b/old/benchmark/bench.c
new file mode 100644
index 0000000..2c3358f
--- /dev/null
+++ b/old/benchmark/bench.c
@@ -0,0 +1,83 @@
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+
+#include "../cube.h"
+
+#define MOVES     100000000
+#define TRANS     100000000
+#define COMPOSE   100000000
+#define INVERSE   100000000
+
+double
+bench(cube_t (*run)(int64_t), int64_t n, char *name)
+{
+	char str[1000];
+	cube_t cube;
+	struct timespec start, end;
+	double tdiff, tdsec, tdnano;
+
+	printf("\n");
+	fflush(stdout);
+
+	if (run == NULL) {
+		printf("> %s: nothing to run!\n", name);
+		fflush(stdout);
+		return -1.0;
+	}
+
+	printf("> %s: running benchmark...\n", name);
+	fflush(stdout);
+	clock_gettime(CLOCK_MONOTONIC, &start);
+
+	cube = run(n);
+	writecube("H48", cube, str);
+	str[3] = 0;
+	printf("> %s: resulting cube, first piece: %s\n", name, str);
+	fflush(stdout);
+
+	clock_gettime(CLOCK_MONOTONIC, &end);
+	tdsec = end.tv_sec - start.tv_sec;
+	tdnano = end.tv_nsec - start.tv_nsec;
+	tdiff = tdsec + 1e-9 * tdnano;
+	printf("> %s: %.4fs\n", name, tdiff);
+	fflush(stdout);
+
+	return tdiff;
+}
+
+int main() {
+	double tmoves, ttrans, tcompose, tinverse;
+
+	printf(
+		"Benchmarks settings:\n"
+		"MOVES:\t%d\nTRANS:\t%d\nCOMPOSE:\t%d\nINVERSE:\t%d\n",
+		MOVES, TRANS, COMPOSE, INVERSE
+	);
+	fflush(stdout);
+
+	srand(time(NULL));
+
+	tmoves = bench(run_moves, MOVES, "moves");
+	ttrans = bench(run_trans, TRANS, "trans");
+	tcompose = bench(run_compose, COMPOSE, "compose");
+	tinverse = bench(run_inverse, INVERSE, "inverse");
+
+	printf(
+		"\nBenchmark summary:\n"
+		"moves:   %d moves            in %.4fs (%.4f MTPS)\n"
+		"trans:   %d transformations  in %.4fs (%.4f MTPS)\n"
+		"compose: %d compositions     in %.4fs (%.4f MCPS)\n"
+		"inverse: %d inverses         in %.4fs (%.4f MIPS)\n"
+		"Total time: %.4f\n",
+		MOVES, tmoves, MOVES / (1e6 * tmoves),
+		TRANS, ttrans, TRANS / (1e6 * ttrans),
+		COMPOSE, tcompose, COMPOSE / (1e6 * tcompose),
+		INVERSE, tinverse, INVERSE / (1e6 * tinverse),
+		tmoves + ttrans + tcompose + tinverse
+	);
+
+	return 0;
+}
-- 
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