The Global Performance Cache, group of time-saving technologies consisting of a global RAM cache, a persistent disk cache, and a new graphics pipeline (along with the Cache Work Area In Background command), is considered the best new feature of After Effects CS6. The explanation by Chris and Trish Meyer in After Effects CS6 (P)Review is the most informative text on this feature cluster to date.
You can see these features in action in various videos below, and in a 15-minute tutorial by Chris Meyer in After Effects CS6 New Features on Lynda.com (7-day free trial).
Todd Kopriva introduces the global performance cache and persistent disk cache, and how these features make rendering and re-rendering layers much quicker:
Brain Maffitt of Total Training seems to be back after a long absence, with AE CS6 training in After Effects CS6 – Performance Cache and AECS6 3D Motion Tracker (leaving the typo at the risk of a stern glare):
Sr. Product Manager Steve Forde shares information on How to Optimize After Effects CS6 for High Performance (and in A Deep Dive into What’s New in After Effects CS6):
After Effects CS 6 – Sneak Peak 2 by Felt Tips looks at his favorite new feature, the Global Performance Cache:
If you speak Polish, then check out Jerzy Drozda Jr. on the “Hash Cache”:
One possibility nearing release but still hidden in development was noted by Steve Forde, After Effects product manager (video from NAB 2012 below):
“Thanks to Global Performance Cache and the Fusion ioFX, After Effects users can experience a faster, more responsive workflow… The Fusion ioFX memory tier provides the high throughput needed to manipulate all digital content in Adobe Creative Suite 6 for real-time content creation such as image editing and compositing as well as boosts video playback, encoding and transcoding, and other data-intensive activities.”