IE8 compatibility view

IE8 compatibility view

Hi all,

While doing a front-end javacript performance test on a site I'm developing, I'm finding on IE8 standards mode everything runs ridiculously slow. But if I flip compatibility view on, it runs very well - the animations are much smoother.

Unfortunately I cannot upload a link to show, but one of the plugins I'm using is a magnifier:

Toggle between compatibility mode, and move cursor around.

I also tried adding the EmulateIE7 meta tag, but it made no difference.
Has anyone encountered this before? Is there a way to fix it?

Please help!