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// Copyright 2018 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/strings/string_util.h"
#include <cinttypes>
#include "base/time/time.h"
#include "build/build_config.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace 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<string16>(str_length, non_ascii_pos);
#if defined(WCHAR_T_IS_UTF32)
MeasureIsStringASCII<std::basic_string<wchar_t>>(str_length,
non_ascii_pos);
#endif
}
}
}
} // namespace base
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