72 lines
1.5 KiB
C++
72 lines
1.5 KiB
C++
#pragma once
|
|
|
|
#include <chrono>
|
|
|
|
namespace perftest
|
|
{
|
|
class Timer
|
|
{
|
|
public:
|
|
void Start()
|
|
{
|
|
// Timestamp
|
|
start = std::chrono::high_resolution_clock::now();
|
|
}
|
|
|
|
void Stop()
|
|
{
|
|
// Timestamps
|
|
stop = std::chrono::high_resolution_clock::now();
|
|
poststop = std::chrono::high_resolution_clock::now();
|
|
|
|
// Calculate duration
|
|
std::chrono::duration<double> span =
|
|
std::chrono::duration_cast<std::chrono::duration<double>>(stop - start - (poststop - stop));
|
|
|
|
// Store
|
|
lastspan = span.count();
|
|
spans.push_back(lastspan);
|
|
}
|
|
|
|
double GetLastDurationSec()
|
|
{
|
|
return lastspan;
|
|
}
|
|
|
|
double GetLastDurationUs()
|
|
{
|
|
return GetLastDurationSec() * 1000000.0;
|
|
}
|
|
|
|
double GetMedianDurationSec()
|
|
{
|
|
double median = 0;
|
|
if (spans.size() > 0)
|
|
{
|
|
sort(spans.begin(), spans.end());
|
|
median = spans.at(spans.size() / 2);
|
|
}
|
|
|
|
return median;
|
|
}
|
|
|
|
double GetMedianDurationUs()
|
|
{
|
|
return GetMedianDurationSec() * 1000000.0;
|
|
}
|
|
|
|
void ReportMedian()
|
|
{
|
|
std::cout << "Test median duration Elapsed ";
|
|
std::cout << static_cast<long long>(round(GetMedianDurationUs())) << " us\n";
|
|
}
|
|
|
|
private:
|
|
std::chrono::high_resolution_clock::time_point start;
|
|
std::chrono::high_resolution_clock::time_point stop;
|
|
std::chrono::high_resolution_clock::time_point poststop;
|
|
double lastspan;
|
|
std::vector<double> spans;
|
|
};
|
|
}
|