When I enable extensions in Safari 5.1.1 on Snow Leopard I get severe keystroke lag. When I disable it the lag goes away. Lately this showed up while testing the Feedly extension.
It's not a new problem ...
- Safari Web Content high CPU usage: Apple Support Communities
- Web Process + Safari now hogging 50-75%...: Apple Support Communities
I suspect it's worse in Snow Leopard in Lion; my now most 5.1.1 users are probably on Lion.
Frustrating.
I was having that problem yesterday: the "Safari Web Content" process seemed to be gobbling up almost all available memory. Today it seem to be fixed in WebKit r99985. (I also just bumped my MBP up to 8 gig).
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