ROUTINE ======================== crypto/tls.(*Conn).readFromUntil in /home/hugo/k/go/src/crypto/tls/conn.go
   2274297    2274449 (flat, cum) 49.80% of Total
         .          .    801:func (c *Conn) readFromUntil(r io.Reader, n int) error {
         .          .    802:	if c.rawInput.Len() >= n {
         .          .    803:		return nil
         .          .    804:	}
         .          .    805:	needs := n - c.rawInput.Len()
         .          .    806:	// There might be extra input waiting on the wire. Make a best effort
         .          .    807:	// attempt to fetch it so that it can be used in (*Conn).Read to
         .          .    808:	// "predict" closeNotify alerts.
         .        152    809:	c.rawInput.Grow(needs + bytes.MinRead)
   2274297    2274297    810:	_, err := c.rawInput.ReadFrom(&atLeastReader{r, int64(needs)})
         .          .    811:	return err
         .          .    812:}