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// 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 "base/json/json_reader.h"
#include "base/json/json_writer.h"
#include "base/memory/ptr_util.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 {
namespace {
// Generates a simple dictionary value with simple data types, a string and a
// list.
std::unique_ptr<DictionaryValue> GenerateDict() {
auto root = std::make_unique<DictionaryValue>();
root->SetDouble("Double", 3.141);
root->SetBoolean("Bool", true);
root->SetInteger("Int", 42);
root->SetString("String", "Foo");
auto list = std::make_unique<ListValue>();
list->Set(0, std::make_unique<Value>(2.718));
list->Set(1, std::make_unique<Value>(false));
list->Set(2, std::make_unique<Value>(123));
list->Set(3, std::make_unique<Value>("Bar"));
root->Set("List", std::move(list));
return root;
}
// Generates a tree-like dictionary value with a size of O(breadth ** depth).
std::unique_ptr<DictionaryValue> GenerateLayeredDict(int breadth, int depth) {
if (depth == 1)
return GenerateDict();
auto root = GenerateDict();
auto next = GenerateLayeredDict(breadth, depth - 1);
for (int i = 0; i < breadth; ++i) {
root->Set("Dict" + std::to_string(i), next->CreateDeepCopy());
}
return root;
}
} // namespace
class JSONPerfTest : public testing::Test {
public:
void TestWriteAndRead(int breadth, int depth) {
std::string description = "Breadth: " + std::to_string(breadth) +
", Depth: " + std::to_string(depth);
auto dict = GenerateLayeredDict(breadth, depth);
std::string json;
TimeTicks start_write = TimeTicks::Now();
JSONWriter::Write(*dict, &json);
TimeTicks end_write = TimeTicks::Now();
perf_test::PrintResult("Write", "", description,
(end_write - start_write).InMillisecondsF(), "ms",
true);
TimeTicks start_read = TimeTicks::Now();
JSONReader::Read(json);
TimeTicks end_read = TimeTicks::Now();
perf_test::PrintResult("Read", "", description,
(end_read - start_read).InMillisecondsF(), "ms",
true);
}
};
TEST_F(JSONPerfTest, StressTest) {
for (int i = 0; i < 4; ++i) {
for (int j = 0; j < 12; ++j) {
TestWriteAndRead(i + 1, j + 1);
}
}
}
} // namespace base
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