Await for multiple futures, Return nil if no future returns error, or return the first error in these futures.

BlockOnAll blocks until all futures complete.

Go spawns a goroutine to execute fn, returns a future that contains the result of fn.

NewDefaultPool returns a pool with cap of the number of logical CPU, and pre-alloced goroutines.

NewPool returns a goroutine pool.

WarmupPool do warm up logic for each goroutine in pool.

Future is a result type of async-await style.

A goroutine pool.

Singleflight wraps golang.org/x/sync/singleflight.Group into generic one.

SingleflightResult is a generic Result wrapper for DoChan.

PoolOption options function to setup pool.