• set of rules giving overall performance evaluation
• automating - can send the overall result from yslow to some address (beaconUrl feature)
• http://blog.mozilla.com/webdev/2009/07/09/cesium-01/
• http://stdev.wordpress.com/2009/10/29/yslow-selenium/
• Firefox extension = Firefox only
• open source, MOZILLA PUBLIC LICENSE Version 1.1

PageSpeed

• similar to YSlow, also automated
• also have timeline with actions what are browser doing (incl. "paint" time = rendering?) - not sure if this stats can be obtained
• open source, Apache License

ShowSlow - stats of YSlow and PageSpeed

• http://groups.google.com/group/make-the-web-faster/browse_thread/thread/e4d14b781c754996?pli=1
• open source, PHP, New BSD License

http://tech.smartfocusdigital.com/2009/11/performance-monitoring-and-reporting.html

HttpWatch

+ automation-ready

+ support for Firefox and IE

- works on principle of catching HTTP requests (it couldn't have be enough for us)

- provides only HTTP request information in way Firebug do it

- extended version available in professional edition

DynaTrace Ajax Edition

+ automation-ready

+ JavaScript markers (in automated jobs, there can be marked places, what should be displayed on outputed timeline)

+ much more detailed view than HttpWatch - can watch rendering time

- support for IE only

• seems that need manual intervation of results:
• https://community.dynatrace.com/community/display/AJAX/Automation+with+dynaTrace+AJAX+Edition
• able to export to XML only via manual steps
• REST/WS interface for obtaining recorded results for commercial (APM) version; planning to add into Ajax Edition as well

Ajax View

+ supports any JavaScript-enabled browser

+ measure JavaScript calls

- measure only JavaScript calls

- after manual testing don't seem usable (tested on livedemo)