Reasonably good talk about performance (speed). There’s a bunch of little things in there that I disagree with, but the general gist is good and there are some good bits.

• The size (in Kb) of webpages and the amount of objects has increased since 1995 on a nice graph.
• 100ms extra loadtime on Amazon.com caused a 1% drop in sales.
• Yahoo did a test: added 400ms to some important pages. Result: 5 to 9% increase in people that click BACK before the page even loaded.
• Google added 500ms, this caused 20% less searches. (!)