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/*
* (C) 2009 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#include "timer.h"
#include <chrono>
#include <iomanip>
Timer::Timer(const std::string& n, u32bit e_mul) :
name(n), event_mult(e_mul)
{
time_used = 0;
timer_start = 0;
event_count = 0;
}
void Timer::start()
{
stop();
timer_start = get_clock();
}
void Timer::stop()
{
if(timer_start)
{
u64bit now = get_clock();
if(now > timer_start)
time_used += (now - timer_start);
timer_start = 0;
++event_count;
}
}
u64bit Timer::get_clock()
{
auto now = std::chrono::high_resolution_clock::now().time_since_epoch();
return std::chrono::duration_cast<std::chrono::nanoseconds>(now).count();
}
std::ostream& operator<<(std::ostream& out, Timer& timer)
{
//out << timer.value() << " ";
double events_per_second_fl =
static_cast<double>(timer.events() / timer.seconds());
u64bit events_per_second = static_cast<u64bit>(events_per_second_fl);
out << events_per_second << " " << timer.get_name() << " per second; ";
std::string op_or_ops = (timer.events() == 1) ? "op" : "ops";
out << std::setprecision(2) << std::fixed
<< timer.ms_per_event() << " ms/op"
<< " (" << timer.events() << " " << op_or_ops << " in "
<< timer.milliseconds() << " ms)";
return out;
}
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