Paratrie 2

[shotasilagadze]

No description provided.

[AskAlexSharov]

i would advise: to run group of "similar" goroutines: use errgroup.WithContext
it will:

• cancel other goroutines if one failed
• don't need errChan - just return err as any other golang code
• can set max amount of simultaneous goroutines (to limit ram use, or if machine is small, etc...): g.SetLimit(6) (even if you always calc 16 prefixes in-parallel)
• easier to understand when "work is done" and propagate error if need. by if err := g.Wait(); err != nil { return err }

Only important limitation:

• use 1 errgroup for 1 set of similar goroutines. Example: If you have another goroutine for logging progress - don't add it to errgroup.