There’s a new "warp" engine built inside the Aurorix 3 (to be released soon) plug-ins Warpoid and Whirlix. These have been re-written from scratch with performance and quality in mind. Although 8-bit will do, we recommend rendering at 16-bit for best results. Floating-point support is expected in future versions.
On many of our recent plug-in builds, we do a lot of internal caching to boost performance. Depending on image dimensions, this can consume a lot of memory, sometimes causing competition with other plug-ins, or causing too much virtual memory read/write (take a look at your "Activity Monitor" application in OS X, or "Task Manager" in Windows XP). Reducing the Maximum Memory Usage in After Effects or Maximum Cache Usage in Combustion will result in less virtual memory access, if Virtual Memory access is slowing your session down.

– Shin Korokawa, DigiEffects
www.digieffects.com