spdlog/example/utils.h
2014-03-07 00:52:50 +02:00

66 lines
1.5 KiB
C++

#pragma once
#include <functional>
#include <chrono>
#include <iostream>
#include <sstream>
#include <iomanip>
#include <locale>
namespace utils
{
template<typename T>
std::string format(const T& value)
{
static std::locale loc("");
std::stringstream ss;
ss.imbue(loc);
ss << value;
return ss.str();
}
template<>
std::string format(const double & value)
{
static std::locale loc("");
std::stringstream ss;
ss.imbue(loc);
ss << std::fixed << std::setprecision(1) << value;
return ss.str();
}
inline void bench(const std::string& fn_name, const std::chrono::milliseconds &duration, const std::function<void() >& fn)
{
using namespace std::chrono;
typedef steady_clock the_clock;
size_t counter = 0;
seconds print_interval(1);
auto start_time = the_clock::now();
auto lastPrintTime = start_time;
while (true) {
fn();
++counter;
auto now = the_clock::now();
if (now - start_time >= duration)
break;
if (now - lastPrintTime >= print_interval) {
std::cout << fn_name << ": " << format(counter) << " per sec" << std::endl;
counter = 0;
lastPrintTime = the_clock::now();
}
}
}
inline void bench(const std::string& fn_name, const std::function<void() >& fn)
{
using namespace std::chrono;
auto start = steady_clock::now();
fn();
auto delta = steady_clock::now() - start;
std::cout << fn_name << ": " << duration_cast<milliseconds>(delta).count() << " ms" << std::endl;
}
}