Hi guys! This looks like a really really good thing to have in blender. I was searching for such tools right now because I have a huge scene that I would like to optimize to use less ram as possible, but the amount of texture is so big that it would take a looooong time to do it "by hand". This tool would allow to have an overview of memory usage really quick!

that's great to hear! :) I downloaded the lastest build from buildbot and yes, now render times are back to normal (maybe even faster! Thanks and keep up the great job guys!

This is the build on which I have the fast rendering, so that you can check if you get the same result http://www.speedyshare.com/E48w4/blender-2.70-6aa75d3-win64-vc12.rar . I also found out something else: it looks like the problem with the slow smoke rendering is related to the usage of a sun light.