Simple google3-compatible benchmarking.
Based on our open-source RE2 benchmarking code.
Includes benchmarks for a handful of <string.h> functions.
Change-Id: I30eb70d25dbf4ad5f2ca44976a8ce3b1ff7dad01
diff --git a/tests/benchmark.h b/tests/benchmark.h
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--- /dev/null
+++ b/tests/benchmark.h
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+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdint.h>
+
+#include <vector>
+
+namespace testing {
+
+class Benchmark {
+ public:
+ Benchmark(const char* name, void (*fn)(int)) {
+ Register(name, fn, NULL);
+ }
+
+ Benchmark(const char* name, void (*fn_range)(int, int)) {
+ Register(name, NULL, fn_range);
+ }
+
+ Benchmark* Arg(int x);
+
+ bool ShouldRun(int argc, char* argv[]);
+ void Run();
+
+ private:
+ const char* name_;
+
+ void (*fn_)(int);
+ void (*fn_range_)(int, int);
+
+ std::vector<int> args_;
+
+ void Register(const char* name, void (*fn)(int), void (*fn_range)(int, int));
+ void RunRepeatedlyWithArg(int iterations, int arg);
+ void RunWithArg(int arg);
+};
+
+} // namespace testing
+
+void SetBenchmarkBytesProcessed(int64_t);
+void StopBenchmarkTiming();
+void StartBenchmarkTiming();
+
+#define BENCHMARK(f) \
+ static ::testing::Benchmark* _benchmark_##f __attribute__((unused)) = \
+ (new ::testing::Benchmark(#f, f))