nostrdb: pull latest, adding flatcc and lmdb

2023-08-25 12:32:30 -07:00
parent f30f93f65c
commit 1f5f1e28a4
104 changed files with 36269 additions and 28 deletions
--- a/nostrdb/flatcc/support/elapsed.h
+++ b/nostrdb/flatcc/support/elapsed.h
@@ -0,0 +1,73 @@
+#ifndef ELAPSED_H
+#define ELAPSED_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdio.h>
+
+/* Based on http://stackoverflow.com/a/8583395 */
+#if !defined(_WIN32)
+#include <sys/time.h>
+static double elapsed_realtime(void) { // returns 0 seconds first time called
+    static struct timeval t0;
+    struct timeval tv;
+    gettimeofday(&tv, 0);
+    if (!t0.tv_sec)
+        t0 = tv;
+    return (double)(tv.tv_sec - t0.tv_sec) + (double)(tv.tv_usec - t0.tv_usec) / 1e6;
+}
+#else
+#include <windows.h>
+#ifndef FatalError
+#define FatalError(s) do { perror(s); exit(-1); } while(0)
+#endif
+static double elapsed_realtime(void) { // granularity about 50 microsecs on my machine
+	static LARGE_INTEGER freq, start;
+    LARGE_INTEGER count;
+    if (!QueryPerformanceCounter(&count))
+        FatalError("QueryPerformanceCounter");
+    if (!freq.QuadPart) { // one time initialization
+        if (!QueryPerformanceFrequency(&freq))
+            FatalError("QueryPerformanceFrequency");
+        start = count;
+    }
+    return (double)(count.QuadPart - start.QuadPart) / freq.QuadPart;
+}
+#endif
+
+/* end Based on stackoverflow */
+
+static int show_benchmark(const char *descr, double t1, double t2, size_t size, int rep, const char *reptext)
+{
+    double tdiff = t2 - t1;
+    double nstime;
+
+    printf("operation: %s\n", descr);
+    printf("elapsed time: %.3f (s)\n", tdiff);
+    printf("iterations: %d\n", rep);
+    printf("size: %lu (bytes)\n", (unsigned long)size);
+    printf("bandwidth: %.3f (MB/s)\n", (double)rep * (double)size / 1e6 / tdiff);
+    printf("throughput in ops per sec: %.3f\n", rep / tdiff);
+    if (reptext && rep != 1) {
+        printf("throughput in %s ops per sec: %.3f\n", reptext, 1 / tdiff);
+    }
+    nstime = tdiff * 1e9 / rep;
+    if (nstime < 1000) {
+        printf("time per op: %.3f (ns)\n", nstime);
+    } else if (nstime < 1e6) {
+        printf("time per op: %.3f (us)\n", nstime / 1000);
+    } else if (nstime < 1e9) {
+        printf("time per op: %.3f (ms)\n", nstime / 1e6);
+    } else {
+        printf("time per op: %.3f (s)\n", nstime / 1e9);
+    }
+    return 0;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* ELAPSED_H */