escaping_benchmark.cc
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1 // Copyright 2018 The Abseil Authors.
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // https://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14 
15 #include "absl/strings/escaping.h"
16 
17 #include <cstdio>
18 #include <cstring>
19 #include <random>
20 
21 #include "benchmark/benchmark.h"
24 
25 namespace {
26 
27 void BM_CUnescapeHexString(benchmark::State& state) {
28  std::string src;
29  for (int i = 0; i < 50; i++) {
30  src += "\\x55";
31  }
32  std::string dest;
33  for (auto _ : state) {
34  absl::CUnescape(src, &dest);
35  }
36 }
37 BENCHMARK(BM_CUnescapeHexString);
38 
39 void BM_WebSafeBase64Escape_string(benchmark::State& state) {
40  std::string raw;
41  for (int i = 0; i < 10; ++i) {
42  for (const auto& test_set : absl::strings_internal::base64_strings()) {
43  raw += std::string(test_set.plaintext);
44  }
45  }
46 
47  // The actual benchmark loop is tiny...
48  std::string escaped;
49  for (auto _ : state) {
50  absl::WebSafeBase64Escape(raw, &escaped);
51  }
52 
53  // We want to be sure the compiler doesn't throw away the loop above,
54  // and the easiest way to ensure that is to round-trip the results and verify
55  // them.
56  std::string round_trip;
57  absl::WebSafeBase64Unescape(escaped, &round_trip);
58  ABSL_RAW_CHECK(round_trip == raw, "");
59 }
60 BENCHMARK(BM_WebSafeBase64Escape_string);
61 
62 // Used for the CEscape benchmarks
63 const char kStringValueNoEscape[] = "1234567890";
64 const char kStringValueSomeEscaped[] = "123\n56789\xA1";
65 const char kStringValueMostEscaped[] = "\xA1\xA2\ny\xA4\xA5\xA6z\b\r";
66 
67 void CEscapeBenchmarkHelper(benchmark::State& state, const char* string_value,
68  int max_len) {
69  std::string src;
70  while (src.size() < max_len) {
71  absl::StrAppend(&src, string_value);
72  }
73 
74  for (auto _ : state) {
75  absl::CEscape(src);
76  }
77 }
78 
79 void BM_CEscape_NoEscape(benchmark::State& state) {
80  CEscapeBenchmarkHelper(state, kStringValueNoEscape, state.range(0));
81 }
82 BENCHMARK(BM_CEscape_NoEscape)->Range(1, 1 << 14);
83 
84 void BM_CEscape_SomeEscaped(benchmark::State& state) {
85  CEscapeBenchmarkHelper(state, kStringValueSomeEscaped, state.range(0));
86 }
87 BENCHMARK(BM_CEscape_SomeEscaped)->Range(1, 1 << 14);
88 
89 void BM_CEscape_MostEscaped(benchmark::State& state) {
90  CEscapeBenchmarkHelper(state, kStringValueMostEscaped, state.range(0));
91 }
92 BENCHMARK(BM_CEscape_MostEscaped)->Range(1, 1 << 14);
93 
94 } // namespace
void StrAppend(std::string *dest, const AlphaNum &a)
Definition: str_cat.cc:193
const std::array< base64_testcase, 5 > & base64_strings()
std::string CEscape(absl::string_view src)
Definition: escaping.cc:1039
bool WebSafeBase64Unescape(absl::string_view src, std::string *dest)
Definition: escaping.cc:1085
void WebSafeBase64Escape(absl::string_view src, std::string *dest)
Definition: escaping.cc:1094
#define ABSL_RAW_CHECK(condition, message)
Definition: raw_logging.h:57
bool CUnescape(absl::string_view source, std::string *dest, std::string *error)
Definition: escaping.cc:1034


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autogenerated on Mon Feb 28 2022 21:31:18