Maybe its because you’re cursing at it… Have you tried whispering to it? Softly?
Seriously, that sounds about right. Not knowing your sequence settings, machine specs, etc., 3:1 time to do an encode from a HD timeline isn’t bad.
A. – With the TC burn, you may be able to play in real-time, but FCP must render the RT effect before it can encode. So, that’s eating some time.
B. – FCP isn’t optimized to use all 8 cores. Open up the Activity monitor next time and watch. Or maybe not, that will probably just make you more angry.
There may be ways to speed up the encode – perhaps specifying a single-pass rather than multi-pass? I’m not too savvy with Flip4…
The hardware solution that you have with the laptop seems very wise. And it saves you 40 minutes a pop.