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In Chrome (and, strangely, also in FireFox to a lesser extent) I'm having a problem with sites that use Google Maps: GMaps itself, Bikely, Strava etc. After a while, rendering of the map gets incredibly slow, panning is painful etc. During this time, the mouse is slow to respond. I get the feeling that it's JavaScript execution that is locking up somehow - but don't know how to verify. On some Strava pages, it can get so bad that simply moving the mouse over the map will take a second or more per redraw of the mouse cursor.

I've tried disabling some extensions (the ones left are things like Adblock, Collusion, LastPass, Chrome2Phone). Beyond that, I can't really think what to look for. I don't think it's just Google Maps either - perhaps it's the fact of panning around big images.

Any suggestions for ways to diagnose the problem, or possible fixes gratefully appreciated.

EDIT Further info: exactly the same symptoms in Chrome, Firefox and Opera. Using normal Google Maps is sort of ok, but apps built on it (especially Google Map Maker) are terrible. Usable for a little while, then everything in the app window gets slower and slower, including typing and moving the mouse. I'm mystified.

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Have you recently updated your graphics drivers? –  Tog Nov 26 '12 at 7:40
    
Could be a problem with your machine being slow... not sure how to specifically diagnose however :/ –  parker.sikand Nov 26 '12 at 8:23
    
Tog: not that I know of. It's a pretty old box (~2006ish), XP Pro. Haven't touched the video card in a long time. But I've only been noticing this extreme slowness in the last month or two. –  Steve Bennett Nov 26 '12 at 8:44
    
@SteveBennett - Load up a virtual machine and see if the problem still exists. –  Ramhound Nov 26 '12 at 12:57
    
Very interesting idea - will give that a go. –  Steve Bennett Nov 28 '12 at 3:06

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