Moved examples to examples folder.

1 files changed, 68 insertions, 0 deletions

diff --git a/examples/rngtest.c b/examples/rngtest.c
new file mode 100644
index 00000000..4a39c4e6
--- /dev/null
+++ b/examples/rngtest.c
@@ -0,0 +1,68 @@
+#include <stdio.h>
+#include <time.h>
+#include "../stc/crandom.h"
+#ifdef __cplusplus
+#include <random>
+#endif
+
+
+#define NN 1000000000
+
+int main(void)
+{
+    clock_t difference, before;
+    uint64_t v;
+    printf("start\n");
+
+    mt19937_t state = mt19937_default();
+    uint32_t k = mt19937_rand(&state);
+    printf("%u - %g\n", k, c_randToFloat(k));
+
+    before = clock(); \
+    v = 0;
+    for (size_t i=0; i<NN; i++) {
+        v += mt19937_rand(&state);
+    }
+    difference = clock() - before;
+    printf("my-mt: %.02f, %zu\n", (float) difference / CLOCKS_PER_SEC, v);
+
+#ifdef __cplusplus
+    std::mt19937 mt_rand;
+    before = clock(); \
+    v = 0;
+    for (size_t i=0; i<NN; i++) {
+        v += mt_rand();
+    }
+    difference = clock() - before;
+    printf("c++mt: %.02f, %zu\n", (float) difference / CLOCKS_PER_SEC, v);
+#endif
+
+    xoroshiro128ss_t xo = xoroshiro128ss_seed(1234);
+    before = clock(); \
+    v = 0;
+    for (size_t i=0; i<NN; i++) {
+        v += xoroshiro128ss_rand(&xo) & 0xffffffff;
+    }
+    difference = clock() - before;
+    printf("xoros: %.02f, %zu\n", (float) difference / CLOCKS_PER_SEC, v);
+
+
+    sfc64_t sfc = sfc64_seed(1234);
+    before = clock(); \
+    v = 0;
+    for (size_t i=0; i<NN; i++) {
+        v += sfc64_rand(&sfc) & 0xffffffff;
+    }
+    difference = clock() - before;
+    printf("sfc64: %.02f, %zu\n", (float) difference / CLOCKS_PER_SEC, v);
+
+/*
+    before = clock(); \
+    v = 0;
+    for (size_t i=0; i<NN; i++) {
+        v += rand();
+    }
+    difference = clock() - before;
+    printf("rand : %.02f, %zu\n", (float) difference / CLOCKS_PER_SEC, v);
+*/
+}
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