class Puma::Server

def fast_write(io, str)
  n = 0
  while true
    begin
      n = io.syswrite str
    rescue Errno::EAGAIN, Errno::EWOULDBLOCK
      if !IO.select(nil, [io], nil, WRITE_TIMEOUT)
        raise ConnectionError, "Socket timeout writing data"
      end
      retry
    rescue  Errno::EPIPE, SystemCallError, IOError
      raise ConnectionError, "Socket timeout writing data"
    end
    return if n == str.bytesize
    str = str.byteslice(n..-1)
  end
end