(61d00a474) v0.9.7.1

Libraries/webm_mem_playback/libvpx/test/bench.cc

@@ -0,0 +1,38 @@
+/*
+ *  Copyright (c) 2018 The WebM project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include <stdio.h>
+#include <algorithm>
+
+#include "test/bench.h"
+#include "vpx_ports/vpx_timer.h"
+
+void AbstractBench::RunNTimes(int n) {
+  for (int r = 0; r < VPX_BENCH_ROBUST_ITER; r++) {
+    vpx_usec_timer timer;
+    vpx_usec_timer_start(&timer);
+    for (int j = 0; j < n; ++j) {
+      Run();
+    }
+    vpx_usec_timer_mark(&timer);
+    times_[r] = static_cast<int>(vpx_usec_timer_elapsed(&timer));
+  }
+}
+
+void AbstractBench::PrintMedian(const char *title) {
+  std::sort(times_, times_ + VPX_BENCH_ROBUST_ITER);
+  const int med = times_[VPX_BENCH_ROBUST_ITER >> 1];
+  int sad = 0;
+  for (int t = 0; t < VPX_BENCH_ROBUST_ITER; t++) {
+    sad += abs(times_[t] - med);
+  }
+  printf("[%10s] %s %.1f ms ( ±%.1f ms )\n", "BENCH ", title, med / 1000.0,
+         sad / (VPX_BENCH_ROBUST_ITER * 1000.0));
+}