Update: reimplement pool internals on top of LPRQ Based on paper by Raed Romanov & Nikita Koval: https://dl.acm.org/doi/epdf/10.1145/3572848.3577485 Shows same or a bit better times than FuzzyPool, but periodically has a very spiky test (from 2ms to 40ms). Also needs further tweaking and documenting Tests: ran unit & perf tests