memory usage through "json.NewDecoder(res.Body).Decode(&gr)"

[RS]

err = json.NewDecoder(res.Body).Decode(&gr)

if err != nil {

log.Println("ERROR:", err)

return

}

Using json.newdecoder to decode the coming response body from client? 
Here is also the issue of " loading the entire response in memory and parsing it" is a matter?
As I am not using a buffer to copy?

Thanks

[Amnon]

Sadly Decode does collect up the entire res.Body into memory.
See https://github.com/golang/go/issues/33714