incomingBytes func(n int64) // Record incoming bytes.
	outgoingBytes func(n int64) // Record outgoing bytes.
	trace         *tracer       // tracer for this connection.
	baseFlags     Flags
	outBytes      atomic.Int64
	inBytes       atomic.Int64
	inMessages    atomic.Int64
	outMessages   atomic.Int64
	reconnects    atomic.Int64
	lastConnect   atomic.Pointer[time.Time]
	lastPingDur   atomic.Int64

	// For testing only

	var buf Buffer
	n := 0
	for r := rune(0); r < NRune; r++ {
		size := utf8.EncodeRune(b[n:], r)
		nbytes, err := buf.WriteRune(r)
		if err != nil {
			t.Fatalf("WriteRune(%U) error: %s", r, err)
		}
		if nbytes != size {
			t.Fatalf("WriteRune(%U) expected %d, got %d", r, size, nbytes)
		}
		n += size
	}
	b = b[0:n]

	// Check the resulting bytes
	if !Equal(buf.Bytes(), b) {

    Murmur3_32Hasher(int seed) {
      this.h1 = seed;
      this.length = 0;
      isDone = false;
    }

    private void update(int nBytes, long update) {
      // 1 <= nBytes <= 4
      buffer |= (update & 0xFFFFFFFFL) << shift;
      shift += nBytes * 8;
      length += nBytes;

      if (shift >= 32) {
        h1 = mixH1(h1, mixK1((int) buffer));
        buffer >>>= 32;
        shift -= 32;
      }
    }

	b.lastRead = opInvalid
	if nBytes := b.Len(); nBytes > 0 {
		m, e := w.Write(b.buf[b.off:])
		if m > nBytes {
			panic("bytes.Buffer.WriteTo: invalid Write count")
		}
		b.off += m
		n = int64(m)
		if e != nil {
			return n, e
		}
		// all bytes should have been written, by definition of
		// Write method in io.Writer
		if m != nBytes {
			return n, io.ErrShortWrite
		}
	}

		return err
	}

	if vssLimit > 0 && vssLimit < humanize.GiByte {
		logger.Info("WARNING: maximum virtual memory limit (%s) is too small for 'go runtime', please consider setting `ulimit -v` to unlimited",
			humanize.IBytes(vssLimit))
	}

	if ctx.MemLimit > 0 {
		debug.SetMemoryLimit(int64(ctx.MemLimit))
	}

	// Do not use RLIMIT_AS as that is not useful and at times on systems < 4Gi

	buf := make([]byte, utf8.UTFMax)
	for r := rune(0); r < NRune; r++ {
		size := utf8.EncodeRune(buf, r)
		nbytes, err := w.WriteRune(r)
		if err != nil {
			t.Fatalf("WriteRune(0x%x) error: %s", r, err)
		}
		if nbytes != size {
			t.Fatalf("WriteRune(0x%x) expected %d, got %d", r, size, nbytes)
		}
	}
	w.Flush()

	r := NewReader(byteBuf)
	// Read them back with ReadRune

		if err != nil {
			return err
		}
		if mlimit > memAvailable {
			logger.Info("WARNING: maximum memory available (%s) smaller than specified --memlimit=%s, ignoring --memlimit value",
				humanize.IBytes(memAvailable), memlimit)
		}
		ctxt.MemLimit = mlimit
	} else {
		ctxt.MemLimit = memAvailable
	}

	if memAvailable < ctxt.MemLimit {
		ctxt.MemLimit = memAvailable
	}

	if capacity < capacityNeeded {
		return false, false, fmt.Sprintf("not enough usable space available to perform speedtest - expected %s, got %s",
			humanize.IBytes(capacityNeeded), humanize.IBytes(capacity))
	}

	// Verify if we can employ autotune without running out of capacity,
	// if we do run out of capacity, make sure to turn-off autotuning
	// in such situations.
	if autotune {

pkg syscall (freebsd-arm64), type IfData struct, Hdrlen uint8
pkg syscall (freebsd-arm64), type IfData struct, Hwassist uint64
pkg syscall (freebsd-arm64), type IfData struct, Ibytes uint64
pkg syscall (freebsd-arm64), type IfData struct, Ierrors uint64
pkg syscall (freebsd-arm64), type IfData struct, Imcasts uint64
pkg syscall (freebsd-arm64), type IfData struct, Ipackets uint64

pkg syscall (darwin-arm64), type IfData struct, Hdrlen uint8
pkg syscall (darwin-arm64), type IfData struct, Hwassist uint32
pkg syscall (darwin-arm64), type IfData struct, Ibytes uint32
pkg syscall (darwin-arm64), type IfData struct, Ierrors uint32
pkg syscall (darwin-arm64), type IfData struct, Imcasts uint32
pkg syscall (darwin-arm64), type IfData struct, Ipackets uint32