node.js - How to test nodejs concurrent Request -

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i want write simple code test nodejs concurrency when receives many requests.

and use loadtest module simulate send many requests server command : 

loadtest -c 10 --rps 200 http://localhost:3000/

my simple code write in server.js :

var http = require('http'); var server = http.createserver(); var cun=0; var step=0;         function handlerequest(req,res) {  console.log(step++);         while(100000000>cun){             cun++;         }         cun=0; }  server.on('request', handlerequest); server.listen(3000);

but requests wait until while loop down

and know solve problem should use callback function , don't know how write it.

var http = require('http'); var url = require("url"); var server = http.createserver();  function handlerequest(req, res) {   res.writehead(200, { 'content-type': 'text/plain'});  var params = url.parse(request.url, true).query; var input = params.number;  /* 1- use input param in algorithm , process 2- insert data in db 3- select on db , return client */      res.end(); } server.on('request', handlerequest); server.listen(3000);

problem : requests wait in queue until last request process(process-insert-select) down


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