http - Freeing unused memory?

Question

I'm using the following function for downloading files smaller than 20MB. It read the entire content to memory as another function has to perform work on the bytes before it can be written to disk.

func getURL(url string) ([]byte, error) {
    resp, err := http.Get(url)
        if err != nil {
            return nil, fmt.Errorf("getURL: %s", err)
    }
    defer resp.Body.Close()

    body, err := ioutil.ReadAll(resp.Body)
    if err != nil {
            return nil, fmt.Errorf("getURL: %s", err)
    }

    return body, nil
}

This works fine, but all memory is consumed on the system.

Is it possible to release memory used by body after it has been processed by another function, so memory use won't be larger than the bytes currently being processed?

Answer 1

Waitting for answers