Performance issue while uploading large files using heimdall client

[nrmaridu]

if request.Body != nil {
reqData, err := ioutil.ReadAll(request.Body)
if err != nil {
return nil, err
}
bodyReader = bytes.NewReader(reqData)
request.Body = ioutil.NopCloser(bodyReader) // prevents closing the body between retries
}
The above piece of code form client.go is using ioutil.ReadAll to read all data from reqeust body. Doesn't that process have performance issue while uploading large files?