"Time is Money - The Measurable Value of Performance by Design"
summary
Shopzilla measures front-end performance with Keynote, HTTPWatch and IE7 browsers proxied through NetEm, inspects Tomcat 8KB flush behavior, and builds nightly real-browser tests that extract waterfall metrics. Changes include added flush commands, combined CSS/JS, deferred JavaScript, reordered ad invocation, sprites, CDN, gzip. Results: time to First Bite 400→200 ms, full-page ~3s but header/above-the-fold subsecond, 0.4% conversion lift, ROI recovered within two months and $480,000 estimated deferred hardware savings.
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chapters (12)
- 0:00Intro
- 0:28About Shopzilla
- 0:48Passion for performance
- 2:19Don't take your eye off the ball
- 2:31Why we took our eye off the ball
- 3:34The cost of ignoring performance
- 4:31What was our approach?
- 6:16What did we find? Lots of good stuff but...
- 7:21Focus on perception
- 7:44Specific changes
- 9:10Did anyone notice?
- 10:35Summary
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