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#include <chrono> // high_resolution_clock, seconds, milliseconds, microseconds, nanoseconds
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#include <cstdint> // uint64_t
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#include <cstdio> // printf
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#include "util/timer.h"
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namespace Util {
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Timer::Timer()
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: m_start(std::chrono::high_resolution_clock::now())
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{
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}
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Timer Timer::operator-(const Timer& timer)
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{
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return Timer(TimePoint { m_start - timer.start() });
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}
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template<typename To, typename From>
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To Timer::to(From from)
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{
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return std::chrono::duration_cast<To>(from);
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}
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uint64_t Timer::toSeconds()
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{
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return to<std::chrono::seconds>(m_start.time_since_epoch()).count();
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}
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uint64_t Timer::toMilliseconds()
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{
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return to<std::chrono::milliseconds>(m_start.time_since_epoch()).count();
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}
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uint64_t Timer::toMicroseconds()
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{
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return to<std::chrono::microseconds>(m_start.time_since_epoch()).count();
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}
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uint64_t Timer::toNanoseconds()
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{
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return to<std::chrono::nanoseconds>(m_start.time_since_epoch()).count();
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}
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template<typename T>
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uint64_t Timer::elapsed()
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{
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auto now = std::chrono::high_resolution_clock::now();
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return std::chrono::duration_cast<T>(now - m_start).count();
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}
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uint64_t Timer::elapsedSeconds()
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{
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return elapsed<std::chrono::seconds>();
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}
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uint64_t Timer::elapsedMilliseconds()
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{
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return elapsed<std::chrono::milliseconds>();
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}
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uint64_t Timer::elapsedMicroseconds()
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{
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return elapsed<std::chrono::microseconds>();
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}
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uint64_t Timer::elapsedNanoseconds()
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{
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return elapsed<std::chrono::nanoseconds>();
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}
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void Timer::fancyPrint(uint64_t nanoseconds)
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{
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if (nanoseconds > 999999999) {
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printf("%.3fs", nanoseconds / 1000000000.0);
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}
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else if (nanoseconds > 999999) {
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printf("%.0fms", nanoseconds / 1000000.0);
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}
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else if (nanoseconds > 999) {
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printf("%.0fμs", nanoseconds / 1000.0);
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}
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else {
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printf("%luns", nanoseconds);
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}
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}
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} // namespace Util
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