Initial commit

VectorFiller/atlas/time/impl/HighResolutionTimer.h

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+// -*- mode: c++ -*-
+
+#pragma once
+
+#include "../time.h"
+
+#include <chrono>
+
+namespace atlas::time {
+class HighResolutionTimer : public Timer<std::chrono::milliseconds> {
+public:
+    void start() override
+    {
+        m_start = std::chrono::high_resolution_clock::now();
+    }
+
+    auto elapsed() const -> duration_type override
+    {
+        return std::chrono::duration_cast<duration_type>(std::chrono::high_resolution_clock::now() - m_start);
+    }
+
+private:
+    std::chrono::high_resolution_clock::time_point m_start;
+};
+
+}

VectorFiller/atlas/time/time.h

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+// -*- mode: c++ -*-
+
+#pragma once
+
+namespace atlas::time {
+template <typename Duration>
+class Timer {
+public:
+    using duration_type = Duration;
+
+    virtual ~Timer() = default;
+    virtual auto start() -> void = 0;
+    virtual auto elapsed() const -> duration_type;
+
+    template <typename T>
+    struct TimerResult {
+        T value;
+        duration_type duration;
+    };
+
+    template <typename F>
+    [[nodiscard]] auto measure(F&& f) -> TimerResult<decltype(f())>
+    {
+        start();
+        auto v = f();
+        return { v, elapsed() };
+    }
+};
+}