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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