Performance Monitoring For All
(mp4 available) Related Links: github/stats.js github/xstats.js link/bunny mark test/stats.js x4 test/xstats.js x4 test/stats.js large test/xstats.js large
Explore the performance cost of pre DOM-load reflow caused by some feature tests. I created a special build of has.js that runs all 177 unminified tests upfront before DOM load. This is an extreme case and executes 3-8x more tests than most projects will use. (mp4 available) Related Links: post/feature testing costs test/reflow
The removeChild() Memory Leak
Tested on Chrome 11.0.663.0, IE8, IE9 RC, and IE9 Platform Preview 8. (mp4 available) Related Links: download/process explorer issue/memory leak issue/follow-up test/leak
Feature Testing Costs
My response to Alex Russell’s recent blog posts over the performance cost of feature testing. The iPhone tests are from my real iPhone 3GS via iDemo. Special thanks to Chris Newman for providing the Kindle tests. Screencast 1 of 3 (mp4 available) Screencast 2 of 3 (mp4 available) Screencast 3 of 3 (mp4 available) Related Links: gist/types of detection jsperf/has-js-suite ...