spdlog/include/utils.h

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#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();
}
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inline void bench(const std::string& fn_name, const std::chrono::milliseconds &duration, const std::function<void() >& fn)
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{
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;
auto p = now - lastPrintTime;
if (now - lastPrintTime >= print_interval)
{
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std::cout << fn_name << ": " << format(counter) << " per sec" << std::endl;
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counter = 0;
lastPrintTime = the_clock::now();
}
}
}
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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;
}
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}