test: benchmark between libs

CMakeLists.txt

@@ -0,0 +1,13 @@
+cmake_minimum_required(VERSION 3.20)
+project(
+  pipeline_asio
+  VERSION 0.1.0
+  LANGUAGES CXX)
+
+# dependencies
+find_package(fmt REQUIRED)
+add_subdirectory(external/pipeline)
+add_subdirectory(external/pipes)
+
+enable_testing()
+add_subdirectory(tests)

tests/CMakeLists.txt

@@ -0,0 +1,7 @@
+find_package(benchmark REQUIRED)
+
+add_executable(pipeline.test pipeline.test.cpp)
+target_compile_features(pipeline.test PUBLIC cxx_std_23)
+target_link_libraries(pipeline.test benchmark::benchmark_main
+                      pipeline::pipeline joboccara::pipes)
+add_test(NAME pipeline.test COMMAND pipeline.test)

tests/pipeline.test.cpp

@@ -0,0 +1,55 @@
+#include <benchmark/benchmark.h>
+
+#include <pipeline/pipeline.hpp>
+#include <pipes/pipes.hpp>
+#include <vector>
+
+namespace {
+
+void BM_Pipeline(benchmark::State& state) {
+  using namespace pipeline;
+
+  for (auto _ : state) {
+    auto add = fn([](auto a, auto b) { return a + b; });
+    auto double_it = fn([](auto a) { return a * 2; });
+    auto square_it = fn([](auto a) { return a * a; });
+    auto pipeline = add | double_it | square_it;
+
+    auto ans = pipeline(0, 1);
+    benchmark::DoNotOptimize(ans);
+  }
+}
+BENCHMARK(BM_Pipeline);
+
+void BM_Pipes(benchmark::State& state) {
+  using namespace pipes;
+
+  for (auto _ : state) {
+    std::vector<int> ans;
+
+    mux(std::vector<int>{0}, std::vector<int>{1}) >>=
+        transform([](int a, int b) { return a + b; }) >>=
+        transform([](int a) { return a * 2; }) >>=
+        transform([](int a) { return a * a; }) >>= push_back(ans);
+
+    benchmark::DoNotOptimize(ans);
+  }
+}
+BENCHMARK(BM_Pipes);
+
+}  // namespace
+
+// 2025-07-31T22:57:54+01:00
+// Running /home/murta/src/pipeline/build/tests/pipeline.test
+// Run on (16 X 3200 MHz CPU s)
+// CPU Caches:
+//   L1 Data 32 KiB (x8)
+//   L1 Instruction 64 KiB (x8)
+//   L2 Unified 512 KiB (x8)
+//   L3 Unified 8192 KiB (x2)
+// Load Average: 0.42, 0.47, 0.40
+// ------------------------------------------------------
+// Benchmark            Time             CPU   Iterations
+// ------------------------------------------------------
+// BM_Pipeline      0.340 ns        0.340 ns   2065571679
+// BM_Pipes          13.3 ns         13.3 ns     54185576