View source for Webdev:Cesium:Beacons

= Overview<br>  =

This page is for tracking beacon information from YSlow and PageSpeed. It is intended both as a reference '''and''' brainstorming tool.<br> 

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= YSlow&nbsp;Beacon Parameters<br>  =

*w – size of the page in bytes (v1 sent size in kilobytes) 
*o – overall YSlow grade calculated for the profile used 
*u – URL of the page tested 
*r – total amount of requests with empty cache 
*s – page identifier for yahoo pages (like yahoo music, sports, etc), blank on non-yahoo pages 
*i – testing profile used: 
**ydefault – YSlow (V2) 
**yslow1 – Classic (V1) 
**yblog – Small Site or Blog 
**or custom profile’s title with dash-encoded spaces 
*ynumreq – Make fewer HTTP requests 
*ycdn – Use a Content Delivery Network (CDN) 
*yexpires – Add Expires headers 
*ycompress – Compress components with gzip 
*ycsstop – Put CSS at top 
*yjsbottom – Put JavaScript at bottom 
*yexpressions – Avoid CSS expressions 
*yexternal – Make JavaScript and CSS external 
*ydns – Reduce DNS lookups 
*yminify – Minify JavaScript and CSS 
*yredirects – Avoid URL redirects 
*ydupes – Remove duplicate JavaScript and CSS 
*yetags – Configure entity tags (ETags) 
*yxhr – Make AJAX cacheable 
*yxhrmethod – Use GET for AJAX requests 
*ymindom – Reduce the number of DOM elements 
*yno404 – Avoid HTTP 404 (Not Found) error 
*ymincookie – Reduce cookie size 
*ycookiefree – Use cookie-free domains 
*ynofilter – Avoid AlphaImageLoader filter 
*yimgnoscale – Do not scale images in HTML 
*yfavicon – Make favicon small and cacheable<br>

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= PageSpeed Beacon Parameters =

Beacon Documentation: [http://code.google.com/p/page-speed/wiki/BeaconDocs http://code.google.com/p/page-speed/wiki/BeaconDocs]

Bug: [http://code.google.com/p/page-speed/issues/detail?id=58 http://code.google.com/p/page-speed/issues/detail?id=58]

= Future Beacon Parameters&nbsp;<br>  =

A future goal is to have YSlow and PageSpeed beacon detailed information about a page's performance. This can be in addition to a normal GET&nbsp;request. The URL&nbsp;parameters can have basic information while a larger response in the POST&nbsp;body can contain detailed statistics regarding a page's assets and score. 

=== YSlow<br>  ===

*Page load time
*Number of JS&nbsp;files 
*Number of CSS&nbsp;files 
*Number of images 
*Total size of components (HTML, JS, CSS, Images) 
*Cached/uncached page weight 
*Components that do not meet rules 
**URL&nbsp; 
**Criteria

=== PageSpeed  ===

TBD.