From bc524d70253a4ab2fe40c3ca3e5666e267c0a4d1 Mon Sep 17 00:00:00 2001
From: Lexi Winter <lexi@le-fay.org>
Date: Sun, 29 Jun 2025 19:25:29 +0100
Subject: import catch2 3.8.1

---
 src/catch2/benchmark/catch_execution_plan.hpp | 58 +++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 src/catch2/benchmark/catch_execution_plan.hpp

(limited to 'src/catch2/benchmark/catch_execution_plan.hpp')

diff --git a/src/catch2/benchmark/catch_execution_plan.hpp b/src/catch2/benchmark/catch_execution_plan.hpp
new file mode 100644
index 0000000..17ca589
--- /dev/null
+++ b/src/catch2/benchmark/catch_execution_plan.hpp
@@ -0,0 +1,58 @@
+
+//              Copyright Catch2 Authors
+// Distributed under the Boost Software License, Version 1.0.
+//   (See accompanying file LICENSE.txt or copy at
+//        https://www.boost.org/LICENSE_1_0.txt)
+
+// SPDX-License-Identifier: BSL-1.0
+// Adapted from donated nonius code.
+
+#ifndef CATCH_EXECUTION_PLAN_HPP_INCLUDED
+#define CATCH_EXECUTION_PLAN_HPP_INCLUDED
+
+#include <catch2/interfaces/catch_interfaces_config.hpp>
+#include <catch2/benchmark/catch_clock.hpp>
+#include <catch2/benchmark/catch_environment.hpp>
+#include <catch2/benchmark/detail/catch_benchmark_function.hpp>
+#include <catch2/benchmark/detail/catch_repeat.hpp>
+#include <catch2/benchmark/detail/catch_run_for_at_least.hpp>
+
+#include <vector>
+
+namespace Catch {
+    namespace Benchmark {
+        struct ExecutionPlan {
+            int iterations_per_sample;
+            FDuration estimated_duration;
+            Detail::BenchmarkFunction benchmark;
+            FDuration warmup_time;
+            int warmup_iterations;
+
+            template <typename Clock>
+            std::vector<FDuration> run(const IConfig &cfg, Environment env) const {
+                // warmup a bit
+                Detail::run_for_at_least<Clock>(
+                    std::chrono::duration_cast<IDuration>( warmup_time ),
+                    warmup_iterations,
+                    Detail::repeat( []() { return Clock::now(); } )
+                );
+
+                std::vector<FDuration> times;
+                const auto num_samples = cfg.benchmarkSamples();
+                times.reserve( num_samples );
+                for ( size_t i = 0; i < num_samples; ++i ) {
+                    Detail::ChronometerModel<Clock> model;
+                    this->benchmark( Chronometer( model, iterations_per_sample ) );
+                    auto sample_time = model.elapsed() - env.clock_cost.mean;
+                    if ( sample_time < FDuration::zero() ) {
+                        sample_time = FDuration::zero();
+                    }
+                    times.push_back(sample_time / iterations_per_sample);
+                }
+                return times;
+            }
+        };
+    } // namespace Benchmark
+} // namespace Catch
+
+#endif // CATCH_EXECUTION_PLAN_HPP_INCLUDED
-- 
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