const http = require('http');
var querystring = require('querystring');
const { performance } = require('perf_hooks');

function test() {
    return new Promise(resolve => {

        let t1 = performance.now();

        var post_data = querystring.stringify({});
        var post_options = {
            host: '127.0.0.1',
            port: '3000',
            path: '/',
            method: 'POST',
            headers: {
                'Content-Type': 'application/json;charset=utf-8',
                'Content-Length': Buffer.byteLength(post_data),
            },
        };

        const post_req = http.request(post_options, onResponse).on('error', onError);
        post_req.write(post_data);
        post_req.end();

        function onResponse(resp) {
            let data = [];

            resp.on('data', (chunk) => {
                data.push(chunk);
            });

            resp.on('end', () => {
                const t2 = performance.now();
                const d1 = t2 - t1;

                console.log('duration', d1);

                console.log('on end', Buffer.concat(data).toString('utf-8'));
                resolve()
            });
        }

        function onError(err) {
            console.log('Error: ' + err.message);
        }
    })

}


test();
test();
test();
test();