首页 \ 问答 \ 当我在IO操作上对它们进行基准测试时，为什么PHP在Node.js上占据优势？(Why does PHP come out on top over Node.js when I benchmark them on a IO operation?)

当我在IO操作上对它们进行基准测试时，为什么PHP在Node.js上占据优势？(Why does PHP come out on top over Node.js when I benchmark them on a IO operation?)

 我正在运行基于PHP和Node.js，端口80和端口8000的apache基准测试工具的基准测试。 下面的节点基准测试命令，在PHP上运行测试时交换端口：  
ab -n 100 -c 100 http://localhost:8000/
 
 我在程序中所做的只是读取10MB的文本文件，然后将其发送回客户端。 令我惊讶的是，PHP基准测试大约需要6秒，Node.js需要大约13秒。  
 这是文本文件：  
 https://github.com/jamesward/play-load-tests/blob/master/public/10mb.txt  
 这是每个的代码：  
 Node.js的  
var http = require("http");
var fs = require("fs");
var s = http.createServer(function(req, res) {

    res.writeHead(200, {"content-type": "text/plain"});

    fs.readFile("./10mb.txt", "utf8", function(err, data) {

        res.end(data);

    });     


});

s.listen(8000);
 
 
 PHP  
<?php

echo file_get_contents("./10mb.txt");
 
 
 我在Node代码中做错了吗？ 否则我很困惑，Node的主要卖点之一就是它在OI操作中很快。 我错过了什么？ 

I'm running an benchmark with the apache benchmarking tool on PHP and Node.js, port 80 and port 8000 respectively. Node benchmark command below, swapping out the port when running tests on PHP: 
ab -n 100 -c 100 http://localhost:8000/
 
What I'm doing in the programs is simply reading in a 10MB text file and then send that back to the client. To my surprise the PHP benchmark takes around 6 seconds and Node.js is way up at 13 seconds. 
This is the text file: 
https://github.com/jamesward/play-load-tests/blob/master/public/10mb.txt 
This is the code for each: 
Node.js 
var http = require("http");
var fs = require("fs");
var s = http.createServer(function(req, res) {

    res.writeHead(200, {"content-type": "text/plain"});

    fs.readFile("./10mb.txt", "utf8", function(err, data) {

        res.end(data);

    });     


});

s.listen(8000);
 
 
PHP 
<?php

echo file_get_contents("./10mb.txt");
 
 
Am I doing something wrong in the Node code? Otherwise I'm pretty confused, one of the main selling points of Node was that it was fast in OI operations. What point am I missing?

原文：https://stackoverflow.com/questions/40645731

更新时间：2023-08-01 13:08

最满意答案

 这是因为你正在使用document.write()清除页面上的其他内容，包括你的处理程序。  
 在隐式加载文档后调用document.write()调用document.open() ，它清除文档。  
 因此，要解决此问题，您需要使用innerHTML之类的内容来仅更新页面中元素的内容。  
 看这个例子 ：  
<html>
  <head>

  </head>

  <body onmousedown="create(event)" onkeydown="type(event)">
    <div id="foo"></div>

    <script>
      function create(event) {
        var x=event.clientX-14;
        var y=event.clientY-33;
        var output = document.getElementById("foo").innerHTML = "<p id=\"text\" style=\"background-color: white; position:    absolute; top:" + y + "px;left:" + x + "px;\";>You're Text, your M@jesty!</p>";
      }
          function type(event)
          {
            var letter_in = event.keyCode;
            var letter = String.fromCharCode(letter_in);
            //var shift = event.shiftKey;
            //if (shift === false) {letter = String.toLowerCase;}
            document.getElementById("foo").innerHTML = letter;
          }
    </script>
  </body>
</html>

It's because you're using document.write() which clears everything else on the page, including your handlers. 
Calling document.write() after the document has been loaded implicitly calls document.open(), which clears the document. 
So to fix this, you want to use something like innerHTML to only update the contents of an element within your page. 
See this example: 
<html>
  <head>

  </head>

  <body onmousedown="create(event)" onkeydown="type(event)">
    <div id="foo"></div>

    <script>
      function create(event) {
        var x=event.clientX-14;
        var y=event.clientY-33;
        var output = document.getElementById("foo").innerHTML = "<p id=\"text\" style=\"background-color: white; position:    absolute; top:" + y + "px;left:" + x + "px;\";>You're Text, your M@jesty!</p>";
      }
          function type(event)
          {
            var letter_in = event.keyCode;
            var letter = String.fromCharCode(letter_in);
            //var shift = event.shiftKey;
            //if (shift === false) {letter = String.toLowerCase;}
            document.getElementById("foo").innerHTML = letter;
          }
    </script>
  </body>
</html>

当我在IO操作上对它们进行基准测试时，为什么PHP在Node.js上占据优势？(Why does PHP come out on top over Node.js when I benchmark them on a IO operation?)

最满意答案

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