Avoid second []byte -> string conversion
Avoid second []byte -> string conversion

[]byte -> string conversions are expensive as they will copy and
generate garbage. Avoid the second one by leveraging the fact that
strings are immutable in Go.

fromkeith/gorequest,rockneurotiko/gorequest,going/requests,QuentinPerez/gorequest,csrgxtu/gorequest,julianshen/gorequest,kemadz/gorequest,roth1002/gorequest,parnurzeal/gorequest,vicanso/gorequest,jqs7/gorequest