Just benchmarked it here on a project:

Bench | Result
---- | ----
Baseline | Memory usage: 88.81MB (peak: 403.32MB), time: 169.06s
staabm/cufa | Memory usage: 89.52MB (peak: 404.01MB), time: 172.56s
staabm/cufa2 | Memory usage: 88.83MB (peak: 403.33MB), time: 166.46s
Seldaek/cufa3 | Memory usage: 88.83MB (peak: 403.33MB), time: 168.33s

So, it seems like if it does yield a benefit it's not massive, and it's not visible on this slow jittery laptop I have now; will try some other time with a new machine.