文件上传的秘密（三）性能和稳定性上的衡量

文件上传的秘密系列之一， http://mojarra.iteye.com/blog/1412497

 

文件上传的秘密系列之二， http://mojarra.iteye.com/blog/1534821

 

对照著名的Apache Common File Upload这个组件， 做一下对比。选取两组文件，每组文件各包含三张照片。

第一组中三张照片的大小是，1.7M、1.7M、1.2M

第二组中三张照片的大小是，574K、588K、384K。

每组文件分别上传20次。计时每次接收文件所用的时间，单位ms.

 

测试的环境就是本机，配置为i5 2.3G/内存4G/硬盘5400转128G。 JDK 6.0.23 For MAC， 服务器Tomcat 7.0.21。

同一web app下，用Common File Upload和本系列中前面封装的文件上传类FileUploadParser分别写一个Servlet，保存文件到指定的目录中。测试中，长传文件使用FireFox 12英文版本。

 

 

第一组数据样本，FileUploadParser单次接收最短耗时36ms,  Apache的Common File Upload单次接收最短耗时67ms，FileUploadParser单次接收最长耗时161ms，Common File Upload单次接收最长耗时275ms。

 

5个最短的FileUploadParser单次接收耗时分别是36ms、36ms、36ms、37ms和37ms，5个最长的耗时是161ms、108ms，94ms、77ms和73ms。

从样本数据中看，Common File Upload对照数据是，5次最短耗时是67ms、69ms、72ms、73ms和73ms，5个最长的耗时是275ms、216ms，204ms、184ms和157ms。

 

cost: 161 
cost: 36 
cost: 37 
cost: 55 
cost: 41 

cost: 37 
cost: 39 
cost: 77 
cost: 108 
cost: 67 

cost: 39 
cost: 36 
cost: 38 
cost: 36 
cost: 53 

cost: 37 
cost: 37 
cost: 73 
cost: 94 
cost: 39 


Apache Common File Upload costs: 69 
Apache Common File Upload costs: 216 
Apache Common File Upload costs: 78 
Apache Common File Upload costs: 275 
Apache Common File Upload costs: 157 

Apache Common File Upload costs: 146 
Apache Common File Upload costs: 204 
Apache Common File Upload costs: 76 
Apache Common File Upload costs: 107 
Apache Common File Upload costs: 132 

Apache Common File Upload costs: 104 
Apache Common File Upload costs: 73 
Apache Common File Upload costs: 106 
Apache Common File Upload costs: 73 
Apache Common File Upload costs: 72 

Apache Common File Upload costs: 87 
Apache Common File Upload costs: 74 
Apache Common File Upload costs: 67 
Apache Common File Upload costs: 88 
Apache Common File Upload costs: 184 

 

 

 第二组数据样本，FileUploadParser单次接收最短耗时13ms,  Apache的Common File Upload单次接收最短耗时16ms，FileUploadParser单次接收最长耗时50ms，Common File Upload单次接收最长耗时107ms。

 

5个最短的FileUploadParser单次接收耗时分别是13ms、13ms、13ms、14ms和14ms，5个最长的耗时是50ms、36ms，19ms、17ms和17ms。

从样本数据中看，Common File Upload对照数据是，5次最短耗时是16ms、18ms、27ms、29ms和30ms，5个最长的耗时是107ms、80ms、75ms、61ms和43ms。

 

 

cost: 36 
cost: 14 
cost: 17 
cost: 13 
cost: 17 
cost: 14 
cost: 13 
cost: 14 
cost: 16 
cost: 14 
cost: 13 
cost: 16 
cost: 14 
cost: 13 
cost: 50 
cost: 15 
cost: 14 
cost: 15 
cost: 16 
cost: 19 


Apache Common File Upload costs: 107 
Apache Common File Upload costs: 27 
Apache Common File Upload costs: 42 
Apache Common File Upload costs: 43 
Apache Common File Upload costs: 41 
Apache Common File Upload costs: 61 
Apache Common File Upload costs: 80 
Apache Common File Upload costs: 45 
Apache Common File Upload costs: 39 
Apache Common File Upload costs: 29 
Apache Common File Upload costs: 32 
Apache Common File Upload costs: 61 
Apache Common File Upload costs: 16 
Apache Common File Upload costs: 30 
Apache Common File Upload costs: 38 
Apache Common File Upload costs: 40 
Apache Common File Upload costs: 75 
Apache Common File Upload costs: 38 
Apache Common File Upload costs: 40 
Apache Common File Upload costs: 18 

 

从测试取得的样本数据分析，无论是最小时间、还是样本数据的方差，最短耗时的方差、最长耗时的方差，Common File Upload除了在第二组数据中的最短单次耗时小幅落后外，其他的指标终大幅落后FileUploadParser. 而且，随着上传文件大小的增加，落后的幅度越大。

 

 

注：测试用的文件上传在本博客的附件中。

 

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评论

3 楼 yu_duo 2012-10-10  

这太高深了~~

2 楼 Mojarra 2012-07-08  

您是个细心的读者，这是很久以前的测试代码，最新的30～40%的领先是基于去掉InputStream/OutputSteam读写转化这个步骤测试的.

/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
	 *      response)
	 */
	protected void doPost(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {

		String path = System.getProperty("user.home") + "/acf/";
		
		
		long s = System.currentTimeMillis();
		
		// Create a factory for disk-based file items
		FileItemFactory factory = new DiskFileItemFactory();

		// Create a new file upload handler
		ServletFileUpload upload = new ServletFileUpload(factory);

		// Parse the request
		try {
			List<FileItem> items = upload.parseRequest(request);
			for (FileItem e : items) {
				e.write(new File(path + e.getName()));
			}
		} catch (Exception e1) {
			// TODO Auto-generated catch block
			e1.printStackTrace();
		}
		
		System.out.format("Apache Common File Upload costs: %d %n", System.currentTimeMillis() - s);
		
	}

1 楼 wendal 2012-07-06  

你的示例, Common File Upload 还包含了Inputstream--> File的额外转换时间呢