Web Performance Checkpoints

YSlow 14 Guidelines-

  • Fewer HTTP Requests — request less during page load time like loading of google analytic, Image Sprites, concat CSS/JS,
  • Use a CDN — most CDN have multiple location as compare to your company has one data centre.
  • Expires/Cache-Control Header
  • Gzip — gidnetwork.net
  • Stylesheets at Top
  • Scripts at Bottom
  • Avoid CSS Expressions
  • Externalise CSS and JS for caching
  • Fewer DNS Lookups
  • Minify JS/CSS
  • Minimize Redirects
  • Avoid Duplicate Scripts
  • ETags
  • Cacheable Ajax

Resource optimisation

  • Image optimisation
  • Image Sprites — spriteme.org
  • Inline Image — dataurl.net/#cssoptimizer
  • Minify JS — compressorrater.thruhere.net/
  • Concatenation — zBugs

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