Created by: aprokop
From the @ambrad's comment in #1525:
I might be wrong, but if you're using ILUT in particular, it might be worth looking at the ILUT::apply() impl a bit, outside of just the LocalSparseTri apply() calls. I suspect there's at least one memory alloc every single apply() call, whereas IIRC we got RILUK::apply() down to none in the common case.
He was right