Originally Posted by MonkeySee....
Its been mentioned a few times that Safari will take up any available RAM and release it when another programme requires it.
Don't worry about it.
OK I see your point, but the point which I might have forgot to mention is that Safari never actually delivers the webcontent of whichever script/pop-over/pop-under is trying to steal all my memory! My banking website just thrashes Safari, and no matter how long I leave it it never delivers the content, whilst my Mac mini slows to a crawl. Trying instead the mega-privacy compromising Chrome browser and the page is rendered in microseconds!
I've tried to analyse the page and see what is broken in Safari (It happened in previous Safari's but I'm now testing Version 6.0.3 (8536.28.4)) unfortunately my diagnostic tools & skills haven't yet got me anywhere near the script/secure-element that really does hard consume all available RAM