default pool : ConcurrentDequePool
cores        : 2

--- 1 thread(s), 40000 round-trips each ---
  threadLocalPool   (2.x default)      317 ms
  concurrentDeque   (3.x default)      317 ms
  nonRecyclingPool  (no reuse)         342 ms

--- 8 thread(s), 40000 round-trips each ---
  threadLocalPool   (2.x default)      328 ms
  concurrentDeque   (3.x default)      416 ms
  nonRecyclingPool  (no reuse)         935 ms