crypto: Add peformance test for SHA1 to compare against base

crypto/sha1_perftest.cc

+// Copyright (c) 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#include "crypto/sha1.h"
+
+#include <stddef.h>
+
+#include <string>
+
+#include "base/sha1.h"
+#include "base/time/time.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "testing/perf/perf_test.h"
+
+namespace {
+
+static const int kBenchmarkRuns = 2000000;
+
+}  // namespace
+
+TEST(SHA1PerfTest, SingleBlock) {
+  const std::string kStartingString = "abc";
+  std::string output;
+  std::string input;
+  base::TimeTicks start;
+
+  input = kStartingString;
+  start = base::TimeTicks::Now();
+  for (int i = 0; i < kBenchmarkRuns; ++i) {
+    output = base::SHA1HashString(input);
+    input = output;
+  }
+  double base_hashes_per_second =
+      kBenchmarkRuns / (base::TimeTicks::Now() - start).InSecondsF();
+  std::string base_output = output;
+
+  input = kStartingString;
+  start = base::TimeTicks::Now();
+  for (int i = 0; i < kBenchmarkRuns; ++i) {
+    output = crypto::SHA1HashString(input);
+    input = output;
+  }
+  double crypto_hashes_per_second =
+      kBenchmarkRuns / (base::TimeTicks::Now() - start).InSecondsF();
+  std::string crypto_output = output;
+
+  EXPECT_EQ(crypto_output, base_output);
+
+  perf_test::PrintResult("sha1_perf", "single", "base", base_hashes_per_second,
+                         "hashes/s", true);
+  perf_test::PrintResult("sha1_perf", "single", "crypto",
+                         crypto_hashes_per_second, "hashes/s", true);
+  perf_test::PrintResult("sha1_perf", "single", "improvement",
+                         crypto_hashes_per_second / base_hashes_per_second,
+                         "times", true);
+}
+
+TEST(SHA1PerfTest, MultiBlock) {
+  const std::string kStartingString =
+      "abcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabc";
+  std::string output;
+  std::string input;
+  base::TimeTicks start;
+
+  input = kStartingString;
+  start = base::TimeTicks::Now();
+  for (int i = 0; i < kBenchmarkRuns; ++i) {
+    output = base::SHA1HashString(input);
+    input = output;
+    input.append(output);
+    input.append(output);
+  }
+  double base_hashes_per_second =
+      kBenchmarkRuns / (base::TimeTicks::Now() - start).InSecondsF();
+  std::string base_output = output;
+
+  input = kStartingString;
+  start = base::TimeTicks::Now();
+  for (int i = 0; i < kBenchmarkRuns; ++i) {
+    output = crypto::SHA1HashString(input);
+    input = output;
+    input.append(output);
+    input.append(output);
+  }
+  double crypto_hashes_per_second =
+      kBenchmarkRuns / (base::TimeTicks::Now() - start).InSecondsF();
+  std::string crypto_output = output;
+
+  EXPECT_EQ(crypto_output, base_output);
+
+  perf_test::PrintResult("sha1_perf", "multi", "base", base_hashes_per_second,
+                         "hashes/s", true);
+  perf_test::PrintResult("sha1_perf", "multi", "crypto",
+                         crypto_hashes_per_second, "hashes/s", true);
+  perf_test::PrintResult("sha1_perf", "multi", "improvement",
+                         crypto_hashes_per_second / base_hashes_per_second,
+                         "times", true);
+}