Draft: EPA: Use NoExtField in XApp
This MR is a (partial, work-in-progress) reimplementation of !11716 (closed). I'm using @alanz's changes as the basis for this work, but I'm also trying to keep allocations down.
The results I'm seeing locally are quite promising:
parsing001(normal) ghc/alloc 455,636,528 432,238,272 -5.1% GOOD
geo. mean -5.1%
minimum -5.1%
maximum -5.1%
That's a 5% decrease instead of an increase!