Node.js比PHP快14倍！

<?php
//index.php
$s=""; //generate a random string of 108KB and a random filename
$fname = chr(rand(0,57)+65).chr(rand(0,57)+65).chr(rand(0,57)+65).chr(rand(0,57)+65).'.txt';
for($i=0;$i<108000;$i++)
{
	$n=rand(0,57)+65;
	$s = $s.chr($n);
}
 
//write s to a file
file_put_contents($fname,$s);
$result = file_get_contents($fname);
echo $result;

//server.js
var http = require('http');	
var server = http.createServer(handler);
 
function handler(request, response) {
	//console.log('request received!');
	response.writeHead(200, {'Content-Type': 'text/plain'});
 
	s=""; //generate a random string of 108KB and a random filename
	fname = String.fromCharCode(Math.floor(65 + (Math.random()*(122-65)) )) +
		String.fromCharCode(Math.floor(65 + (Math.random()*(122-65)) )) +
		String.fromCharCode(Math.floor(65 + (Math.random()*(122-65)) )) + 
		String.fromCharCode(Math.floor(65 + (Math.random()*(122-65)) )) + ".txt";
 
	for(i=0;i<108000;i++)
	{
		n=Math.floor(65 + (Math.random()*(122-65)) );
		s+=String.fromCharCode(n);
	}
 
	//write s to a file
	var fs = require('fs');
	fs.writeFile(fname, s, function(err, fd) {
			if (err) throw err;
			//console.log("The file was saved!");
			//read back from the file
			fs.readFile(fname, function (err, data) {
				if (err) throw err;
				result = data;
				response.end(result);
			});	
		}
	);
}
 
server.listen(8124);
console.log('Server running at http://127.0.0.1:8124/');

PHP:
Concurrency Level:      200
Time taken for tests:   574.796 seconds
Complete requests:      2000
 
node.js:
Concurrency Level:      200
Time taken for tests:   41.887 seconds
Complete requests:      2000