ProRes4444 HQ processing time

Was wondering if anyone had experience processing Prores4444 HQ output as dnx36 or h264.

With a non XQ file I typically can reach speeds near 90fps, but with XQ files I max out around 60fps for both deliverables.
Wondering if this is just the nature of processing XQ or if there is anything I should be doing to speed up the files.

I don’t have any hard numbers, but those speeds sound reasonable. ProRes decoding is solely CPU based.