47 lines
1.5 KiB
C++
47 lines
1.5 KiB
C++
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// Copyright 2018 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/strings/string_util.h"
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#include <cinttypes>
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#include "base/time/time.h"
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#include "build/build_config.h"
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#include "testing/gtest/include/gtest/gtest.h"
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namespace base {
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template <typename String>
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void MeasureIsStringASCII(size_t str_length, size_t non_ascii_pos) {
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String str(str_length, 'A');
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if (non_ascii_pos < str_length)
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str[non_ascii_pos] = '\xAF';
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TimeTicks t0 = TimeTicks::Now();
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for (size_t i = 0; i < 10000000; ++i)
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IsStringASCII(str);
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TimeDelta time = TimeTicks::Now() - t0;
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printf(
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"char-size:\t%zu\tlength:\t%zu\tnon-ascii-pos:\t%zu\ttime-ms:\t%" PRIu64
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"\n",
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sizeof(typename String::value_type), str_length, non_ascii_pos,
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time.InMilliseconds());
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}
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TEST(StringUtilTest, DISABLED_IsStringASCIIPerf) {
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for (size_t str_length = 4; str_length <= 1024; str_length *= 2) {
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for (size_t non_ascii_loc = 0; non_ascii_loc < 3; ++non_ascii_loc) {
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size_t non_ascii_pos = str_length * non_ascii_loc / 2 + 2;
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MeasureIsStringASCII<std::string>(str_length, non_ascii_pos);
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MeasureIsStringASCII<string16>(str_length, non_ascii_pos);
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#if defined(WCHAR_T_IS_UTF32)
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MeasureIsStringASCII<std::basic_string<wchar_t>>(str_length,
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non_ascii_pos);
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#endif
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}
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}
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}
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} // namespace base
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