Chromium drains battery

I love google's chrome browser and since I found a corresponding extension to all my firefox addons I really switched to chrome. So I'm using it on my netbook, too. But recently I found out that chrome causes way too much CPU wake ups. I used powertop for the analysis rather than the battery applet's Processor information.

Idling, with chromium running, one page open (my blog):

And now compare with firefox. Also idling with only my blog opened:

As you can see firefox doesn't even appear in the list of processes waking up the CPU when idling. The CPU stays in the C4 state for 97.2% of the time, which is quite decent. But chromium wakes up the CPU 217 times per second and makes more CPU load balancing necessary, too. All in all it makes the CPU staying in C4 state 77.3 % of the time, only, which is very bad.

Well, that means that I'll be using firefox again. I guess I'll file a bug about that.

Update
Well, as I said I filed a bug but soon I learned that I didn't think of the possibility that one of my extensions could be the reason. And so it was. My beloved google mail checker 'Google Mail Checker Plus" was the trouble. Since I uninstalled it chrome is running fine.