| // Copyright 2018 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "base/strings/string_util.h" |
| |
| #include <cinttypes> |
| |
| #include "base/time/time.h" |
| #include "build/build_config.h" |
| #include "testing/gtest/include/gtest/gtest.h" |
| |
| namespace gurl_base { |
| |
| template <typename String> |
| void MeasureIsStringASCII(size_t str_length, size_t non_ascii_pos) { |
| String str(str_length, 'A'); |
| if (non_ascii_pos < str_length) |
| str[non_ascii_pos] = '\xAF'; |
| |
| TimeTicks t0 = TimeTicks::Now(); |
| for (size_t i = 0; i < 10000000; ++i) |
| IsStringASCII(str); |
| TimeDelta time = TimeTicks::Now() - t0; |
| printf( |
| "char-size:\t%zu\tlength:\t%zu\tnon-ascii-pos:\t%zu\ttime-ms:\t%" PRIu64 |
| "\n", |
| sizeof(typename String::value_type), str_length, non_ascii_pos, |
| time.InMilliseconds()); |
| } |
| |
| TEST(StringUtilTest, DISABLED_IsStringASCIIPerf) { |
| for (size_t str_length = 4; str_length <= 1024; str_length *= 2) { |
| for (size_t non_ascii_loc = 0; non_ascii_loc < 3; ++non_ascii_loc) { |
| size_t non_ascii_pos = str_length * non_ascii_loc / 2 + 2; |
| MeasureIsStringASCII<std::string>(str_length, non_ascii_pos); |
| MeasureIsStringASCII<std::u16string>(str_length, non_ascii_pos); |
| #if defined(WCHAR_T_IS_32_BIT) |
| MeasureIsStringASCII<std::basic_string<wchar_t>>(str_length, |
| non_ascii_pos); |
| #endif |
| } |
| } |
| } |
| |
| } // namespace base |