Why do we choose []byte as the type of workload func's param/output, not interface{}

[jasonliu119]

IIUC, the workload function is like:

func doSomething(data []byte, option map[string][]string) ([]byte, error) 

Why do we choose []byte as the type of its param/output, not interface{} or Golang any?

[jasonliu119]

Also, maybe option can be a param of type map[string]interface{}

[s8sg]

I think it was mostly to avoid serialization issue.