Mini refactoring of recomputeGraph

General cleanup in preparation of bug fixing.
4 jobs for adinapoli/issue-321 in 142 minutes and 46 seconds (queued for 96 minutes and 4 seconds)
latest
Status Job ID Name Coverage
  Cabal
passed #12105
cabal

01:08:15

 
  Stack
passed #12106
stack

00:02:57

 
  Bench
manual #12107
allowed to fail manual
bench
 
  Test
passed #12108
test

01:11:33