App Engine花费更长的时间（> 1秒）为静态JS提供静态CSS [英] App Engine taking Far Longer (> 1 sec) to serve static JS than static CSS

问题描述

（编辑过的问题b / c我意识到它涉及到文件类型）

这个文件是20kb。它始终服务> 1秒。

http://www.adrenalinemobility.com/js/ss-symbolicons.js

code $ $ b

这是同一个文件 .css，因为它是扩展名：

http://www.adrenalinemobility.com/js/ss-symbolicons.css

它服务几乎整整快一秒。

这是我的app.yaml：

  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 $ -  name：jinja2 
版本：latest 
 
处理程序：
  -  url：/favicon\.ico 
 static_files：assets / favicon.ico 
上传：assets / favicon\.ico 
 
  -  url：/ css 
 static_dir：assets / css 
 $ b  -  url：/ img 
 static_dir：assets / img 
 
  -  url：/ js 
 static_dir：assets / js 
 
  -  url：/.* 
 script：web.APP 
  

我也试过这个 s

   -  url： /js/ss-symbolicons.js 
 static_files：assets / js / ss-symbolicons.js 
 upload：assets / js / ss-symbolicons.js 
  

我观察到的方式：

• Chrome，Firefox在Linux上） - 从硅谷的DSL连接
  
• wget，curl等从该机器获得。


• 远程wget和卷曲，美国伊利诺伊大学高速服务器


• 远程web测试服务（如webpagetest）（见下文）：
  
  $ b 这里有一个webpagetest瀑布图来说明这个问题 - 注意一个文件有一个巨大的TTFB： http://www.webpagetest.org/result/131101_ZQ_ZGQ/1/details/
  
  
  

  如果我手动将mime_type设置为文本，那么它运行得很快。 application / javascript ， application / x-javascript ， text / javascript 都很慢。目前，如果您想测试，这些文件不需要手动指定MIME类型。

  
  
  

  更多信息，请参见jchu：
  
  

  慢速版的服务内容为： Content-Length：19973 ，快速版的服务于： Transfer-Encoding：chunked

  
  
  

  更多细节：
  
  

  我通常会得到服务器 74.125 .28.121 。 reddit上的某个人获得了服务器 173.194.71.121 ，它们之间似乎甚至有服务速度。所以也许它是服务器/位置相关的？
  
  

  关于这个问题的另一篇文章
  
  

  这是一个包含两个文件请求的完整卷曲日志的pastebin
  
  

  < a href =http://pastebin.com/raw.php?i=Bh0TwHix =nofollow noreferrer>这是另一个pastebin，其中只有来自每个文件的十个请求的时序信息处于紧密循环中

  解决方案

  将mime_type：text添加到您的JavaScript静态资源中。需要看看mime_type是什么，假设是什么聪明的技巧正在做的文本VS其他MIME类型......

  
  

  (Question edited b/c I have realized it involves file type)

  This file is 20kb. It is consistently taking > 1 second to serve.

  http://www.adrenalinemobility.com/js/ss-symbolicons.js

  Here is the same file with .css as it's extension:

  http://www.adrenalinemobility.com/js/ss-symbolicons.css

  It serves almost 1 whole second faster.

  Here is my app.yaml:

  application: adrenaline-website
  version: 1
  api_version: 1
  runtime: python27
  threadsafe: true
  
  libraries:
  - name: jinja2
    version: latest
  
  handlers:
  - url: /favicon\.ico
    static_files: assets/favicon.ico
    upload: assets/favicon\.ico
  
  - url: /css
    static_dir: assets/css
  
  - url: /img
    static_dir: assets/img
  
  - url: /js
    static_dir: assets/js
  
  - url: /.*
    script: web.APP
  

  I've also tried this static_files line (before the /js handler), and it was slow too:

  - url: /js/ss-symbolicons.js
    static_files: assets/js/ss-symbolicons.js
    upload: assets/js/ss-symbolicons.js
  

  Ways I have observed this:

  • Chrome, Firefox (both on Linux) - from a DSL connection in Silicon Valley
  • wget, curl, etc from that machine.
  • Remotely wget and curl from a high-speed server at the University of Illinois
  • Remote web testing services like webpagetest (see below):

  Here's a webpagetest waterfall graph that illustrates this problem - notice the one file has a huge TTFB: http://www.webpagetest.org/result/131101_ZQ_ZGQ/1/details/

  If i manually set the mime_type to text, then it goes fast. application/javascript, application/x-javascript, text/javascript are all slow. Currently those files are serving without manually specified mime-type if you wish to test.

  Some more info, as noticed by jchu:

  The slow version serves with: Content-Length: 19973 and the fast version serves with: Transfer-Encoding: chunked

  Still more details:

  I usually get server 74.125.28.121. Someone on reddit got server 173.194.71.121 and it seems to have even serving speeds between them. So maybe it's server/location dependent?

  Another post about this issue

  Here is a pastebin with full curl logs of requests for both files

  Here is another pastebin with just the timing information from ten requests on each file in a tight loop

  解决方案

  Add mime_type: text to your JavaScript static resource.

  Would need to look into what mime_type is being assumed, what what clever trick is being done for text vs other mime types...

  这篇关于App Engine花费更长的时间（&gt; 1秒）为静态JS提供静态CSS的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！