The Warp Stabilizer effect is processed in the background so that you can continue working in After Effects while the analysis is taking place. It is deliberate that the Warp Stabilizer isn't consuming all of your resources, allowing you to continue to work in After Effects as normal while the analysis is done.
Wait until you try and render it!
It makes the new camera lens blur seem speedy.
My 1 minute 30 shot will take 20 hours to render!
OK, Wait until you try and render it!
i must say that even though it takes waaaaaaaaaaaaaay too long it does a good job