Ready-to-use highly parallel wrapper for golang.org/x/sync/singleflight that shards calls between multiple internal singleflight.Group to eliminate global locks and increase throughput under high load. The only difference - keys after function.

ShardedFlight is a parallel wrapper around golang.org/x/sync/singleflight that shards calls across groups to boost throughput under heavy load 🐙. Zero-alloc keying with a pluggable hash keeps latency low.