[libcxx-commits] [libcxx] [libc++] Refactor and add benchmarks from [alg.nonmodifying] (PR #128206)

[Nikolas Klauser via libcxx-commits]

================
@@ -0,0 +1,137 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+
+#include <algorithm>
+#include <cassert>
+#include <cstddef>
+#include <deque>
+#include <list>
+#include <string>
+#include <vector>
+
+#include <benchmark/benchmark.h>
+#include "../../GenerateInput.h"
+
+int main(int argc, char** argv) {
+  auto std_search = [](auto first1, auto last1, auto first2, auto last2) {
+    return std::search(first1, last1, first2, last2);
+  };
+  auto std_search_pred = [](auto first1, auto last1, auto first2, auto last2) {
+    return std::search(first1, last1, first2, last2, [](auto& x, auto& y) {
+      benchmark::DoNotOptimize(x);
+      benchmark::DoNotOptimize(y);
+      return x == y;
+    });
+  };
+  auto ranges_search_pred = [](auto first1, auto last1, auto first2, auto last2) {
+    return std::ranges::search(first1, last1, first2, last2, [](auto& x, auto& y) {
+      benchmark::DoNotOptimize(x);
+      benchmark::DoNotOptimize(y);
+      return x == y;
+    });
+  };
+
----------------
philnik777 wrote:

We should also add benchmarks for the cases
- when the two ranges are the same length and are equal
- when the subrange is just a single element


https://github.com/llvm/llvm-project/pull/128206