Timer usage notes

timer Use notes
windows platform ：
CreateWaitableTimer
SetWaitableTimer

boost library ：
timer
progress_timer
progress_display

timer Equivalent to a timer （ millisecond ）, At the same time, relevant operation functions are provided for programmers to use .

// Import header file ,.hpp by .h+cpp, Such files do not need to be precompiled

#include<boost/timer.hpp>
#include<iostream>
using namespace std;
// Use boost Namespace 
using namespace boost;
int main()
{
    
	timer t;// Define a timer , Start timing from definition 
	// The maximum time of the timer 
	cout << "max timespan:" << t.elapsed_max() / 3600 << "h" << endl;
	// Minimum timer time 
	cout << "min timespan:" << t.elapsed_min() << "s" << endl;
	// Output the current timing time of the timer 
	cout << "now time elapsed" << t.elapsed() << "s" << endl;
}

timer Another common method is as follows ：
// Retime
void restart(){_start_time = std::clock();}

progress_timer At the time of deconstruction Automatically call elspsed()
meanwhile progress_timer It can also cooperate with stringstream To use , Information can be output in stringstream in
stringstream s;
{
progress_timer t(s);// After the scope is out, the information will be entered in s in , Instead of printing it out
}
cout << s.str()<< endl;// Can pass s take t To print the timing information

progress_display It has a display function
May refer to ：https://blog.csdn.net/qq_42214953/article/details/105841155