Comment on Aperture

Aperture works very fast in my macbook 2.4 (early 2008).

It is snappier than iPhoto and consumes less memory/cpu than Adobe Bridge.
I am learning how to use it with Lynda.com training.

About Aperture VS Lightroom survey: There are more people using windows than Mac, so It's easy to explain why more people are using Lightroom. That survey should be done ONLY with people who use macs.

Lightroom seems a very good app too. Can somebody tell me if Lightroom uses more cpu than Aperture? Having a cpu hog kills laptop's battery.