WP Super Cache.

Ranks various locations (from cities to countries), and service providers, on Internet bandwidth.

Roger Johansson on how to use a single stylesheet for multiple media types.

Users discussing performance of Mac OS X 10.5 Leopard on PowerPC Macs. Consensus on the PB12 seems to be that Leopard runs nicely with 1.25GB RAM and the 1.5 GHz processor, and upgrading the HDD to at least 5,400 RPM is advisable.

James Bennett on why it always makes sense to use a separate server instance to deliver static media (CSS, JS, etc.) from the one that hosts the application (Django, in his case) serving dynamic content. He uses Amazon S3 for the former and a Virtual Private Server for the latter.

Recently released performance diagnostic tool for WordPress.

WordPress codex entry on performance optimization via content offloading.

Elliott C. Back's WordPress performance optimization tips.

How to set expires headers on Mint's js files, even though you shouldn't.

Austin Matzko has written a plugin that provides output compression functionality to WP-Cache.

Mark Jaquith publishing the same tip on output compression for WP-Cache.

Chris Stormer's tip on enabling output compression on files served by WP-Cache.

Gmail down for four hours.

Dave Shea on optimizing image sprites for performance with high traffic sites.

Robert Nyman on Smush.it, an image optimization service.

Philipp Lenssen on some modest page-weight savings Google could have made back in 2006 by moving from their deprecated markup to a standards-based XHTML and CSS approach.