1 files changed, 58 insertions, 0 deletions
diff --git a/testing/gtest/mozilla/MozGTestBench.cpp b/testing/gtest/mozilla/MozGTestBench.cpp
new file mode 100644
index 0000000000..cc6898099e
--- /dev/null
+++ b/testing/gtest/mozilla/MozGTestBench.cpp
@@ -0,0 +1,58 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "MozGTestBench.h"
+#include "mozilla/TimeStamp.h"
+#include <stdio.h>
+#include <string>
+#include <vector>
+
+#define MOZ_GTEST_BENCH_FRAMEWORK "platform_microbench"
+#define MOZ_GTEST_NUM_ITERATIONS 5
+
+namespace mozilla {
+void GTestBench(const char* aSuite, const char* aName,
+                const std::function<void()>& aTest) {
+#if defined(DEBUG) || defined(MOZ_ASAN)
+  // Run the test to make sure that it doesn't fail but don't log
+  // any measurements since it's not an optimized build.
+  aTest();
+#else
+  bool shouldAlert = bool(getenv("PERFHERDER_ALERTING_ENABLED"));
+  std::vector<int> durations;
+
+  for (int i = 0; i < MOZ_GTEST_NUM_ITERATIONS; i++) {
+    mozilla::TimeStamp start = TimeStamp::Now();
+
+    aTest();
+
+    durations.push_back((TimeStamp::Now() - start).ToMicroseconds());
+  }
+
+  std::string replicatesStr = "[" + std::to_string(durations[0]);
+  for (int i = 1; i < MOZ_GTEST_NUM_ITERATIONS; i++) {
+    replicatesStr += "," + std::to_string(durations[i]);
+  }
+  replicatesStr += "]";
+
+  // median is at index floor(i/2) if number of replicates is odd,
+  // (i/2-1) if even
+  std::sort(durations.begin(), durations.end());
+  int medianIndex =
+      (MOZ_GTEST_NUM_ITERATIONS / 2) + ((durations.size() % 2 == 0) ? (-1) : 0);
+
+  // Print the result for each test. Let perfherder aggregate for us
+  printf(
+      "PERFHERDER_DATA: {\"framework\": {\"name\": \"%s\"}, "
+      "\"suites\": [{\"name\": \"%s\", \"subtests\": "
+      "[{\"name\": \"%s\", \"value\": %i, \"replicates\": %s, "
+      "\"lowerIsBetter\": true, \"shouldAlert\": %s}]"
+      "}]}\n",
+      MOZ_GTEST_BENCH_FRAMEWORK, aSuite, aName, durations[medianIndex],
+      replicatesStr.c_str(), shouldAlert ? "true" : "false");
+#endif
+}
+
+}  // namespace mozilla