From 59ae4d5a0e833bedd9d7cc059ac15a9dc130e3f7 Mon Sep 17 00:00:00 2001
From: Abseil Team <absl-team@google.com>
Date: Fri, 18 May 2018 08:24:54 -0700
Subject:   - a4e14440b870dbf7b36975eaebf783a70a7fcee4 Release string_view
 microbenchmarks. by Alex Strelnikov <strel@google.com>   -
 7cec68e37e16fb4e266368236ae1de6419f6946a Increase Abseil's minimum supported
 cmake version to 3.1.... by Jon Cohen <cohenjon@google.com>   -
 b977456175c8db380676bd56c44b32efbfc6f606 Fix a typo in the mutex.h comments.
 by Abseil Team <absl-team@google.com>   -
 3d30cec131d08b066bc1cf877e4f661e8ee0584c Release StrSplit microbenchmarks. by
 Alex Strelnikov <strel@google.com>   -
 dddece6031feac1cca4689e623462f895f28d019 Release StrReplace microbenchmarks.
 by Alex Strelnikov <strel@google.com>   -
 ac3b40e1694f74bdcf31b8d1152481e92edfd441 Internal Change by Abseil Team
 <absl-team@google.com>   - d0e69ad6ddf0e59596a02ccab0253967f2909cdb Release
 StrCat microbenchmarks. by Alex Strelnikov <strel@google.com>   -
 db4d471030fa320d2b9d2ce241610333f0eb7a50 Release StrJoin microbenchmarks. by
 Alex Strelnikov <strel@google.com>

GitOrigin-RevId: a4e14440b870dbf7b36975eaebf783a70a7fcee4
Change-Id: I3f12700aafce677049f4d1a6e09ea821963a8c9e
---
 absl/strings/str_join_benchmark.cc | 98 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 98 insertions(+)
 create mode 100644 absl/strings/str_join_benchmark.cc

(limited to 'absl/strings/str_join_benchmark.cc')

diff --git a/absl/strings/str_join_benchmark.cc b/absl/strings/str_join_benchmark.cc
new file mode 100644
index 00000000..79cad5e3
--- /dev/null
+++ b/absl/strings/str_join_benchmark.cc
@@ -0,0 +1,98 @@
+//
+// 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
+//
+//      http://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/str_join.h"
+
+#include <string>
+#include <vector>
+#include <utility>
+
+#include "benchmark/benchmark.h"
+
+namespace {
+
+void BM_Join2_Strings(benchmark::State& state) {
+  const int string_len = state.range(0);
+  const int num_strings = state.range(1);
+  const std::string s(string_len, 'x');
+  const std::vector<std::string> v(num_strings, s);
+  for (auto _ : state) {
+    std::string s = absl::StrJoin(v, "-");
+    benchmark::DoNotOptimize(s);
+  }
+}
+BENCHMARK(BM_Join2_Strings)
+    ->ArgPair(1 << 0, 1 << 3)
+    ->ArgPair(1 << 10, 1 << 3)
+    ->ArgPair(1 << 13, 1 << 3)
+    ->ArgPair(1 << 0, 1 << 10)
+    ->ArgPair(1 << 10, 1 << 10)
+    ->ArgPair(1 << 13, 1 << 10)
+    ->ArgPair(1 << 0, 1 << 13)
+    ->ArgPair(1 << 10, 1 << 13)
+    ->ArgPair(1 << 13, 1 << 13);
+
+void BM_Join2_Ints(benchmark::State& state) {
+  const int num_ints = state.range(0);
+  const std::vector<int> v(num_ints, 42);
+  for (auto _ : state) {
+    std::string s = absl::StrJoin(v, "-");
+    benchmark::DoNotOptimize(s);
+  }
+}
+BENCHMARK(BM_Join2_Ints)->Range(0, 1 << 13);
+
+void BM_Join2_KeysAndValues(benchmark::State& state) {
+  const int string_len = state.range(0);
+  const int num_pairs = state.range(1);
+  const std::string s(string_len, 'x');
+  const std::vector<std::pair<std::string, int>> v(num_pairs, std::make_pair(s, 42));
+  for (auto _ : state) {
+    std::string s = absl::StrJoin(v, ",", absl::PairFormatter("="));
+    benchmark::DoNotOptimize(s);
+  }
+}
+BENCHMARK(BM_Join2_KeysAndValues)
+    ->ArgPair(1 << 0, 1 << 3)
+    ->ArgPair(1 << 10, 1 << 3)
+    ->ArgPair(1 << 13, 1 << 3)
+    ->ArgPair(1 << 0, 1 << 10)
+    ->ArgPair(1 << 10, 1 << 10)
+    ->ArgPair(1 << 13, 1 << 10)
+    ->ArgPair(1 << 0, 1 << 13)
+    ->ArgPair(1 << 10, 1 << 13)
+    ->ArgPair(1 << 13, 1 << 13);
+
+void BM_JoinStreamable(benchmark::State& state) {
+  const int string_len = state.range(0);
+  const int num_strings = state.range(1);
+  const std::vector<std::string> v(num_strings, std::string(string_len, 'x'));
+  for (auto _ : state) {
+    std::string s = absl::StrJoin(v, "", absl::StreamFormatter());
+    benchmark::DoNotOptimize(s);
+  }
+}
+BENCHMARK(BM_JoinStreamable)
+    ->ArgPair(0, 0)
+    ->ArgPair(16, 1)
+    ->ArgPair(256, 1)
+    ->ArgPair(16, 16)
+    ->ArgPair(256, 16)
+    ->ArgPair(16, 256)
+    ->ArgPair(256, 256);
+
+}  // namespace
+
+BENCHMARK_MAIN();
-- 
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