I checked out the listed drivers: _asyncpg_ has [unfixed bugs](https://github.com/cheatfate/asyncpg/issues/9) and seems not supported.
**treeform/pg** the pool waiting has `await sleep_async(100)` (<https://github.com/treeform/pg/blob/master/src/pg.nim#L75>) maybe it would be worth to reduce it to like 10 or 1? It's better to burn CPU than to waste time being idle...
