.animate() - setInterval

.animate() - setInterval

in http://api.jquery.com/animate/ i saw a comment:

Just if anyone is interested: Animations are "rendered" using a setInterval with a time out of 13ms. This is quite fast! Chrome's fastest possible interval is about 10ms. All other browsers "sample" at about 20-30ms.

in a follow up comment i found:
I have dropped this value down to 50ms in my current project (by altering the hardcoded value in jQuery source); no noticeable impact on smoothness of the animation but the CPU usage has dropped massively!

the code in jquery was:
"timerId = setInterval(jQuery.fx.tick, 13);"  - line 5769 in development version of 1.4.2
"W=setInterval(c.fx.tick,13)" - line 141 in minimized version of 1.4.2

this can be altered only if the source code is in the same server.
if the jQ source code is in a different server (google CDN etc.) can anything be done to solve this?