On my unibody MacBook, Flash can peg the CPU pretty easily if I'm not running FlashBlock. It may be more that I leave many tabs open. I used to just use Chrome when I really needed to see a Flash-heavy site, but recent releases have much worse performance than before. For example, a video in Flash will use 200% CPU under Chrome, but < 100% under Safari or Firefox.
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On my unibody MacBook, Flash can peg the CPU pretty easily if I'm not running FlashBlock. It may be more that I leave many tabs open. I used to just use Chrome when I really needed to see a Flash-heavy site, but recent releases have much worse performance than before. For example, a video in Flash will use 200% CPU under Chrome, but < 100% under Safari or Firefox.