curl_connect.cpp

// $ g++ -std=c++11 -o curl_connect curl_connect.cpp -lcurl
// $ ./curl_connect

#include <stdio.h>
#include <curl/curl.h>
#include <chrono>
#include <iostream>

using namespace std;
using namespace std::chrono;

class stopwatch
{
public:
	void start() { record(m_start); }
	void stop() { record(m_stop); }

	void reset()
	{
		m_start = high_resolution_clock::time_point::min();
		m_stop = m_start;
	}

	template<typename T>
	typename T::rep elapsed() const
	{
		return duration_cast<T>(m_stop - m_start).count();
	}

private:
	void record(high_resolution_clock::time_point& tp)
	{
		tp = high_resolution_clock::now();
	}

	high_resolution_clock::time_point m_start;
	high_resolution_clock::time_point m_stop;
};

int main(void)
{
	CURL *curl;
	CURLcode res;
	stopwatch sw;
	curl = curl_easy_init();
	if(curl)
	{
		curl_easy_setopt(curl, CURLOPT_URL, "http://127.0.0.1");
		while(true)
		{
			sw.start();
			res = curl_easy_perform(curl);
			sw.stop();
			if(res != CURLE_OK) cerr << curl_easy_strerror(res) << endl;
			cout << "Elapsed: " << sw.elapsed<microseconds>() << " us" << endl;
		}
		curl_easy_cleanup(curl);
	}
	else
	{
		cerr << "Can't create curl." << endl;
	}
	return 0;
}