Add 'third_party/abseil_cpp/' from commit '768eb2ca28'

git-subtree-dir: third_party/abseil_cpp
git-subtree-mainline: ffb2ae54be
git-subtree-split: 768eb2ca28

third_party/abseil_cpp/absl/strings/escaping_benchmark.cc

@@ -0,0 +1,94 @@
+// Copyright 2018 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// 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 "absl/strings/escaping.h"
+
+#include <cstdio>
+#include <cstring>
+#include <random>
+
+#include "benchmark/benchmark.h"
+#include "absl/base/internal/raw_logging.h"
+#include "absl/strings/internal/escaping_test_common.h"
+
+namespace {
+
+void BM_CUnescapeHexString(benchmark::State& state) {
+  std::string src;
+  for (int i = 0; i < 50; i++) {
+    src += "\\x55";
+  }
+  std::string dest;
+  for (auto _ : state) {
+    absl::CUnescape(src, &dest);
+  }
+}
+BENCHMARK(BM_CUnescapeHexString);
+
+void BM_WebSafeBase64Escape_string(benchmark::State& state) {
+  std::string raw;
+  for (int i = 0; i < 10; ++i) {
+    for (const auto& test_set : absl::strings_internal::base64_strings()) {
+      raw += std::string(test_set.plaintext);
+    }
+  }
+
+  // The actual benchmark loop is tiny...
+  std::string escaped;
+  for (auto _ : state) {
+    absl::WebSafeBase64Escape(raw, &escaped);
+  }
+
+  // We want to be sure the compiler doesn't throw away the loop above,
+  // and the easiest way to ensure that is to round-trip the results and verify
+  // them.
+  std::string round_trip;
+  absl::WebSafeBase64Unescape(escaped, &round_trip);
+  ABSL_RAW_CHECK(round_trip == raw, "");
+}
+BENCHMARK(BM_WebSafeBase64Escape_string);
+
+// Used for the CEscape benchmarks
+const char kStringValueNoEscape[] = "1234567890";
+const char kStringValueSomeEscaped[] = "123\n56789\xA1";
+const char kStringValueMostEscaped[] = "\xA1\xA2\ny\xA4\xA5\xA6z\b\r";
+
+void CEscapeBenchmarkHelper(benchmark::State& state, const char* string_value,
+                            int max_len) {
+  std::string src;
+  while (src.size() < max_len) {
+    absl::StrAppend(&src, string_value);
+  }
+
+  for (auto _ : state) {
+    absl::CEscape(src);
+  }
+}
+
+void BM_CEscape_NoEscape(benchmark::State& state) {
+  CEscapeBenchmarkHelper(state, kStringValueNoEscape, state.range(0));
+}
+BENCHMARK(BM_CEscape_NoEscape)->Range(1, 1 << 14);
+
+void BM_CEscape_SomeEscaped(benchmark::State& state) {
+  CEscapeBenchmarkHelper(state, kStringValueSomeEscaped, state.range(0));
+}
+BENCHMARK(BM_CEscape_SomeEscaped)->Range(1, 1 << 14);
+
+void BM_CEscape_MostEscaped(benchmark::State& state) {
+  CEscapeBenchmarkHelper(state, kStringValueMostEscaped, state.range(0));
+}
+BENCHMARK(BM_CEscape_MostEscaped)->Range(1, 1 << 14);
+
+}  // namespace