// writeBlocks writes a specified chunk of symbols to the output buffer. It
// breaks the write up into ≥blockSize chunks to write them out, and schedules
// as many goroutines as necessary to accomplish this task. This call then
// blocks, waiting on the writes to complete. Note that we use the sem parameter
// to limit the number of concurrent writes taking place.

   * concurrently readable hash table. The map supports non-blocking reads and concurrent writes
   * across different segments.
   *
   * The page replacement algorithm's data structures are kept casually consistent with the map. The
   * ordering of writes to a segment is sequentially consistent. An update to the map and recording

func (h extraHeader) Write(w *bufio.Writer) {
	if h.date != nil {
		w.Write(headerDate)
		w.Write(h.date)
		w.Write(crlf)
	}
	if h.contentLength != nil {
		w.Write(headerContentLength)
		w.Write(h.contentLength)
		w.Write(crlf)
	}
	for i, v := range []string{h.contentType, h.connection, h.transferEncoding} {
		if v != "" {
			w.Write(extraHeaderKeys[i])
			w.Write(colonSpace)

	writebyte := func(o uint8) { wOff = objw.Uint8(x, wOff, o) }

	// Write one non-aggregate arg/field/element.
	write1 := func(sz, offset int64) {
		if offset >= rtabi.TraceArgsSpecial {
			writebyte(rtabi.TraceArgsOffsetTooLarge)
		} else {
			writebyte(uint8(offset))
			writebyte(uint8(sz))
		}
		n++
	}

	// Visit t recursively and write it out.
	// Returns whether to continue visiting.