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#pragma once
#include <chrono>
namespace jg
class stopwatch final
using clock = std::chrono::high_resolution_clock;
clock::time_point m_start = clock::now();
template <typename T>
typename T::rep duration_rep() const
return std::chrono::duration_cast<T>(clock::now() - m_start).count();
std::chrono::microseconds::rep us() const
return duration_rep<std::chrono::microseconds>();
std::chrono::milliseconds::rep ms() const
return duration_rep<std::chrono::milliseconds>();
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