Modern disks are around 1000 times slower than memory. At that point, using data compression on disk caches to keep more of the filesystem's contents in memory longer can be a win. The paper describes a prototype compressed cache design for both page and swap caches, with benchmarks of performance and power consumption.
Subtitle: Genesis and Status
Subtitle: A Short Overview
Subtitle: How Fast is it Going, Who is Doing It, What They are Doing, and Who is Sponsoring It
Subtitle: a large scale cross-platform desktop application