Chrome vs Safari memory usage

(Dammit, outlook sucks, sorry for the endless repost/deletions!)

Comparing Safari vs Chrome in memory usage/handling. Opening 8 tabs, loading 8 different sites. Same sites in each browser, same order of tabs as well.

The first image shows:

Total memory Safari is 129532/121784KB (total/page), Chrome is a lot less with 140708/85380KB (total/page) 

For some reason Chrome assigns more total memory but uses a lot less page memory than Safari. Why? Also note Chrome has more processes open than there are tabs (I'd expect the number of processes to be #processes+1 but somehow Chrome has one extra process..)

However, here's the kicker.
Next was closing all tabs (except for one) and loading http://my.yahoo.com in the remaining tab. See image 2:



Woops! Sa fari, give me my memory back! Chrome, unsurprisingly has closed all processes and freed that memory.
Funnily, now Chrome does have 1 process more than there are tabs (I guess one for the "main" application, and all others for the tabs)

I'm not an engineer (long time since I've programmed anything), but it looks like this is a clear case for seperate processes for tabs.
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