SLOW Export with Color Transform; FP 2015 Ext 2

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Hi.

I wanted to see if anyone has come across a similar issue and/or solution.

I'm working an ACES pipeline (16bit FP) and conforming a feature reel by reel.  I'm trying to send a check conform to the editor via "Export" of each reel.  Since my sequence is in ACES space, during the Export (I've tried both Quicktime AND DPX) I apply a ColorTransform "ACES_To_HD-video_v0.7".  At that point, the entire export takes 10 times(!!!!) as long as if I did not use the transform.  I've systematically tried the other steps, and they all are as fast as expected, until this step is added.

My work-around is to apply the ColorTransform using LUTEditor TimelineFX to the whole timeline in a Gap Effect, then render, then export, but it seems silly and ties up desktop render time.

Any thoughts?

System: HP Z800, Flame Premium 2015 Ext 2, Redhat 6.2