From a9ce3df5c59515c12d4fcdf3b7ad43cefdf122b6 Mon Sep 17 00:00:00 2001
From: Tyge Løvset <tylo@norceresearch.no>
Date: Mon, 21 Dec 2020 14:28:56 +0100
Subject: Added some benchmarks. Fix typo in cdeq.h

---
 benchmarks/crand_benchmark2.cpp | 75 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100644 benchmarks/crand_benchmark2.cpp

(limited to 'benchmarks/crand_benchmark2.cpp')

diff --git a/benchmarks/crand_benchmark2.cpp b/benchmarks/crand_benchmark2.cpp
new file mode 100644
index 00000000..3ae6f8ab
--- /dev/null
+++ b/benchmarks/crand_benchmark2.cpp
@@ -0,0 +1,75 @@
+#include <stdio.h>
+#include <time.h>
+#include <stc/crand.h>
+#include <random>
+
+void test1(void)
+{
+    enum {N = 1000000000};
+    clock_t diff, before;
+    uint64_t sum;
+
+    std::random_device device;
+    std::mt19937 rng(device());
+    std::uniform_int_distribution<int> idist(1, 10);
+    std::uniform_real_distribution<double> fdist(1, 10);
+
+    before = clock();
+    sum = 0;
+    c_forrange (N) {
+        sum += rng();
+    }
+    diff = clock() - before;
+    printf("std::random:\t\t%.02f, %zu\n", (float) diff / CLOCKS_PER_SEC, sum);
+
+    before = clock();
+    sum = 0;
+    c_forrange (N) {
+        sum += idist(rng);
+    }
+    diff = clock() - before;
+    printf("std::uniform:\t\t%.02f, %zu\n\n", (float) diff / CLOCKS_PER_SEC, sum);
+
+    c_forrange (30) printf("%02zd ", idist(rng));
+    puts("");
+    c_forrange (8) printf("%f ", fdist(rng));
+    puts("\n");
+}
+
+void test2(void)
+{
+    enum {N = 1000000000};
+    clock_t diff, before;
+    uint64_t sum;
+
+    crand_t rng = crand_init(time(NULL));
+    crand_uniform_t idist = crand_uniform_init(1, 10);
+    crand_uniformf_t fdist = crand_uniformf_init(1, 10);
+
+    before = clock();
+    sum = 0;
+    c_forrange (N) {
+        sum += crand_next(&rng);
+    }
+    diff = clock() - before;
+    printf("crand_next:\t\t%.02f, %zu\n", (float) diff / CLOCKS_PER_SEC, sum);
+
+    before = clock();
+    sum = 0;
+    c_forrange (N) {
+        sum += crand_uniform(&rng, &idist);
+    }
+    diff = clock() - before;
+    printf("crand_uniform:\t\t%.02f, %zu\n\n", (float) diff / CLOCKS_PER_SEC, sum);
+
+    c_forrange (30) printf("%02zd ", crand_uniform(&rng, &idist));
+    puts("");
+    c_forrange (8) printf("%f ", crand_uniformf(&rng, &fdist));
+    puts("\n");
+}
+
+int main()
+{
+    test1();
+    test2();
+}
\ No newline at end of file
-- 
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