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diff --git a/src/rapidjson/test/perftest/platformtest.cpp b/src/rapidjson/test/perftest/platformtest.cpp
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+// Tencent is pleased to support the open source community by making RapidJSON available.
+//
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// 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 "perftest.h"
+
+// This file is for giving the performance characteristics of the platform (compiler/OS/CPU).
+
+#if TEST_PLATFORM
+
+#include <cmath>
+#include <fcntl.h>
+
+// Windows
+#ifdef _WIN32
+#include <windows.h>
+#endif
+
+// UNIX
+#if defined(unix) || defined(__unix__) || defined(__unix)
+#include <unistd.h>
+#ifdef _POSIX_MAPPED_FILES
+#include <sys/mman.h>
+#endif
+#endif
+
+class Platform : public PerfTest {
+public:
+ virtual void SetUp() {
+ PerfTest::SetUp();
+
+ // temp buffer for testing
+ temp_ = (char *)malloc(length_ + 1);
+ memcpy(temp_, json_, length_);
+ checkSum_ = CheckSum();
+ }
+
+ char CheckSum() {
+ char c = 0;
+ for (size_t i = 0; i < length_; ++i)
+ c += temp_[i];
+ return c;
+ }
+
+ virtual void TearDown() {
+ PerfTest::TearDown();
+ free(temp_);
+ }
+
+protected:
+ char *temp_;
+ char checkSum_;
+};
+
+TEST_F(Platform, CheckSum) {
+ for (int i = 0; i < kTrialCount; i++)
+ EXPECT_EQ(checkSum_, CheckSum());
+}
+
+TEST_F(Platform, strlen) {
+ for (int i = 0; i < kTrialCount; i++) {
+ size_t l = strlen(json_);
+ EXPECT_EQ(length_, l);
+ }
+}
+
+TEST_F(Platform, memcmp) {
+ for (int i = 0; i < kTrialCount; i++) {
+ EXPECT_EQ(0, memcmp(temp_, json_, length_));
+ }
+}
+
+TEST_F(Platform, pow) {
+ double sum = 0;
+ for (int i = 0; i < kTrialCount * kTrialCount; i++)
+ sum += pow(10.0, i & 255);
+ EXPECT_GT(sum, 0.0);
+}
+
+TEST_F(Platform, Whitespace_strlen) {
+ for (int i = 0; i < kTrialCount; i++) {
+ size_t l = strlen(whitespace_);
+ EXPECT_GT(l, whitespace_length_);
+ }
+}
+
+TEST_F(Platform, Whitespace_strspn) {
+ for (int i = 0; i < kTrialCount; i++) {
+ size_t l = strspn(whitespace_, " \n\r\t");
+ EXPECT_EQ(whitespace_length_, l);
+ }
+}
+
+TEST_F(Platform, fread) {
+ for (int i = 0; i < kTrialCount; i++) {
+ FILE *fp = fopen(filename_, "rb");
+ ASSERT_EQ(length_, fread(temp_, 1, length_, fp));
+ EXPECT_EQ(checkSum_, CheckSum());
+ fclose(fp);
+ }
+}
+
+#ifdef _MSC_VER
+TEST_F(Platform, read) {
+ for (int i = 0; i < kTrialCount; i++) {
+ int fd = _open(filename_, _O_BINARY | _O_RDONLY);
+ ASSERT_NE(-1, fd);
+ ASSERT_EQ(length_, _read(fd, temp_, length_));
+ EXPECT_EQ(checkSum_, CheckSum());
+ _close(fd);
+ }
+}
+#else
+TEST_F(Platform, read) {
+ for (int i = 0; i < kTrialCount; i++) {
+ int fd = open(filename_, O_RDONLY);
+ ASSERT_NE(-1, fd);
+ ASSERT_EQ(length_, read(fd, temp_, length_));
+ EXPECT_EQ(checkSum_, CheckSum());
+ close(fd);
+ }
+}
+#endif
+
+#ifdef _WIN32
+TEST_F(Platform, MapViewOfFile) {
+ for (int i = 0; i < kTrialCount; i++) {
+ HANDLE file = CreateFile(filename_, GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
+ ASSERT_NE(INVALID_HANDLE_VALUE, file);
+ HANDLE mapObject = CreateFileMapping(file, NULL, PAGE_READONLY, 0, length_, NULL);
+ ASSERT_NE(INVALID_HANDLE_VALUE, mapObject);
+ void *p = MapViewOfFile(mapObject, FILE_MAP_READ, 0, 0, length_);
+ ASSERT_TRUE(p != NULL);
+ EXPECT_EQ(checkSum_, CheckSum());
+ ASSERT_TRUE(UnmapViewOfFile(p) == TRUE);
+ ASSERT_TRUE(CloseHandle(mapObject) == TRUE);
+ ASSERT_TRUE(CloseHandle(file) == TRUE);
+ }
+}
+#endif
+
+#ifdef _POSIX_MAPPED_FILES
+TEST_F(Platform, mmap) {
+ for (int i = 0; i < kTrialCount; i++) {
+ int fd = open(filename_, O_RDONLY);
+ ASSERT_NE(-1, fd);
+ void *p = mmap(NULL, length_, PROT_READ, MAP_PRIVATE, fd, 0);
+ ASSERT_TRUE(p != NULL);
+ EXPECT_EQ(checkSum_, CheckSum());
+ munmap(p, length_);
+ close(fd);
+ }
+}
+#endif
+
+#endif // TEST_PLATFORM