Base Perftest

base/value_perftest.cc

+// Copyright 2017 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 <algorithm>
+#include <numeric>
+#include <random>
+#include <string>
+
+#include "base/memory/ptr_util.h"
+#include "base/strings/string_piece.h"
+#include "base/time/time.h"
+#include "base/values.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "testing/perf/perf_test.h"
+
+namespace base {
+
+class ValuePerfTest : public testing::Test {
+ public:
+  enum class TestOrder { ASCENDING, DESCENDING, INTERLEAVED, RANDOM };
+
+  std::string to_string(TestOrder order) {
+    switch (order) {
+      case TestOrder::ASCENDING:
+        return "ascending";
+      case TestOrder::DESCENDING:
+        return "descending";
+      case TestOrder::INTERLEAVED:
+        return "interleaved";
+      case TestOrder::RANDOM:
+        return "random";
+      default:
+        return "";
+    }
+  }
+
+  std::vector<int> GetLengths(int max_length, TestOrder order) {
+    std::vector<int> lengths(max_length + 1);
+    std::iota(std::begin(lengths), std::end(lengths), 0);
+
+    switch (order) {
+      case TestOrder::ASCENDING:
+        break;
+      case TestOrder::DESCENDING:
+        std::reverse(std::begin(lengths), std::end(lengths));
+        break;
+      case TestOrder::INTERLEAVED:
+        for (int i = 0; i < max_length / 2; i += 2)
+          std::swap(lengths[i], lengths[max_length - i]);
+        break;
+      case TestOrder::RANDOM: {
+        std::random_device rd;
+        std::mt19937 g(rd());
+        std::shuffle(std::begin(lengths), std::end(lengths), g);
+        break;
+      }
+    }
+
+    return lengths;
+  }
+
+  void TestStringMoveAssign(int max_length, TestOrder order) {
+    std::string description = "Max Length: " + std::to_string(max_length) +
+                              ", TestOrder: " + to_string(order);
+
+    double duration = 0.0;
+    for (auto length : GetLengths(max_length, order)) {
+      auto val = Value(std::string(length, 'a'));
+      TimeTicks start = TimeTicks::Now();
+      val_ = std::move(val);
+      TimeTicks end = TimeTicks::Now();
+      duration += (end - start).InMicroseconds();
+    }
+
+    perf_test::PrintResult("StringMoveAssign", "", description, duration, "us",
+                           true);
+  }
+
+  void TestListMoveAssign(int max_length, TestOrder order) {
+    std::string description = "Max Length: " + std::to_string(max_length) +
+                              ", TestOrder: " + to_string(order);
+
+    double duration = 0.0;
+    for (auto length : GetLengths(max_length, order)) {
+      auto val = ListValue();
+      for (int i = 0; i < length; ++i)
+        val.AppendInteger(i);
+      TimeTicks start = TimeTicks::Now();
+      val_ = std::move(val);
+      TimeTicks end = TimeTicks::Now();
+      duration += (end - start).InMicroseconds();
+    }
+
+    perf_test::PrintResult("ListMoveAssign", "", description, duration, "us",
+                           true);
+  }
+
+  void TestDictMoveAssign(int max_length, TestOrder order) {
+    std::string description = "Max Length: " + std::to_string(max_length) +
+                              ", TestOrder: " + to_string(order);
+
+    double duration = 0.0;
+    for (auto length : GetLengths(max_length, order)) {
+      auto val = DictionaryValue();
+      for (int i = 0; i < length; ++i)
+        val.Set(std::to_string(i), MakeUnique<Value>(i));
+      TimeTicks start = TimeTicks::Now();
+      val_ = std::move(val);
+      TimeTicks end = TimeTicks::Now();
+      duration += (end - start).InMicroseconds();
+    }
+
+    perf_test::PrintResult("DictMoveAssign", "", description, duration, "us",
+                           true);
+  }
+
+  void TestSortStringValues(int max_length, TestOrder order) {
+    std::string description = "Max Length: " + std::to_string(max_length) +
+                              ", TestOrder: " + to_string(order);
+
+    std::vector<base::Value> values;
+    values.reserve(max_length);
+    for (auto length : GetLengths(max_length, order))
+      values.emplace_back(std::string(length, 'a'));
+
+    TimeTicks start = TimeTicks::Now();
+    std::sort(std::begin(values), std::end(values),
+              [](const base::Value& lhs, const base::Value& rhs) {
+                return lhs.GetString() < rhs.GetString();
+              });
+    TimeTicks end = TimeTicks::Now();
+    double duration = (end - start).InMicroseconds();
+
+    perf_test::PrintResult("SortStringValues", "", description, duration, "us",
+                           true);
+  }
+
+ private:
+  Value val_;
+};
+
+TEST_F(ValuePerfTest, StringAssignTest) {
+  for (int l = 0; l < 19; ++l) {
+    for (int o = 0; o < 1; ++o) {
+      TestStringMoveAssign(1 << l, static_cast<ValuePerfTest::TestOrder>(o));
+    }
+  }
+}
+
+TEST_F(ValuePerfTest, ListAssignTest) {
+  for (int l = 0; l < 15; ++l) {
+    for (int o = 0; o < 1; ++o) {
+      TestListMoveAssign(1 << l, static_cast<ValuePerfTest::TestOrder>(o));
+    }
+  }
+}
+
+TEST_F(ValuePerfTest, DictAssignTest) {
+  for (int l = 0; l < 14; ++l) {
+    for (int o = 0; o < 1; ++o) {
+      TestDictMoveAssign(1 << l, static_cast<ValuePerfTest::TestOrder>(o));
+    }
+  }
+}
+
+TEST_F(ValuePerfTest, SortTest) {
+  for (int l = 0; l < 19; ++l) {
+    for (int o = 0; o < 4; ++o) {
+      TestSortStringValues(1 << l, static_cast<ValuePerfTest::TestOrder>(o));
+    }
+  }
+}
+
+}  // namespace base