Sometimes rendering takes a long time. A frame per second is not a long time in the context of visual effects and compositing. Expect the old timers to now chime in and tell you about how lucky you are to get 1 second per frame rendering times with any compositing or animation software.
That said, here’s a link to a page that gives some tips on how you can make things faster—though often with tradeoffs:
“Improve performance”
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Todd Kopriva, Adobe Systems Incorporated
putting the ‘T’ back in ‘RTFM’ : After Effects Help on the Web
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