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25 September 2012

Fastest loading of Webpage using Browser Caching

Recently I have done performance improvement in one project.
Here are the key points.

  • While serving js/css from your server. Send Cache-control and Expiry header to one year. Now When user open page for second time, it will pick these js/css from cache.

    Now the big question is - What will happen when some update is available in js/css file ? Answer - Use SVN revision number in js/css url.

    Example - http://YOUR-SERVER.com/JS/plugin.js?r=890

    When there is update available, it will 891. Now URL is changed and browser will pick up new version of JS file. Same applicable for CSS and other Static resources.
  • While serving Dynamic resources, Identify that which resources are session specific and something which will not change. You can serve them using session id.
Using the above technique, your web-page will load super-fast. 
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