for m := range re {
		if err := enc.Encode(m); err != nil {
			s.writeErrorResponse(w, errors.New("Encoding mrf failed: "+err.Error()))
			return
		}
	}
}

// DevNull - everything goes to io.Discard
func (s *peerRESTServer) DevNull(w http.ResponseWriter, r *http.Request) {
	if !s.IsValid(w, r) {
		s.writeErrorResponse(w, errors.New("invalid request"))
		return
	}

	globalNetPerfRX.Connect()

			// unconsumedTimer fires.
			select {
			// Check after a second
			case <-time.After(time.Second):
				h.mutex.Unlock()
				continue

			case <-h.ctx.Done():
				h.mutex.Unlock()
				// discard result and return.
				return errHealStopSignalled

			// Timeout if no results consumed for too long.
			case <-unconsumedTimer.C:
				h.mutex.Unlock()
				return errHealIdleTimeout
			}
		}
		break

		config.EnvRootPassword,
	} {
		os.Unsetenv(env)
	}

	// Set as non-distributed.
	globalIsDistErasure = false

	// Disable printing console messages during tests.
	color.Output = io.Discard
	// Disable Error logging in testing.
	logger.DisableErrorLog = true

	// Uncomment the following line to see trace logs during unit tests.
	// logger.AddTarget(console.New())

				}
				if hdr.OpCode.IsControl() {
					if err := controlHandler(hdr, &wsReader); err != nil {
						return nil, err
					}
					continue
				}
				if hdr.OpCode&want == 0 {
					if err := wsReader.Discard(); err != nil {
						return nil, err
					}
					continue
				}
				if int64(cap(dst)) < hdr.Length+1 {
					dst = make([]byte, 0, hdr.Length+hdr.Length>>3)
				}

	if m == nil {
		return false
	}
	cache := m
	switch {
	case !cache.finished() && time.Since(cache.lastUpdate) > metacacheMaxRunningAge:
		// Not finished and update for metacacheMaxRunningAge, discard it.
		return false
	case cache.finished() && time.Since(cache.lastHandout) > 5*metacacheMaxClientWait:
		// Keep for 15 minutes after we last saw the client.

						errOnce.Do(func() {
							retError = err.Error()
						})
					}
					downloadsCancel()
					return
				}
				fbr := firstByteRecorder{
					r: r,
				}
				n, err := xioutil.Copy(xioutil.Discard, &fbr)
				r.Close()
				if err == nil {
					response := time.Since(t)
					ttfb := time.Since(*fbr.t)
					// Only capture success criteria - do not
					// have to capture failed reads, truncated

	}
}

func TestCloseOnWriter(t *testing.T) {
	writer := WriteOnClose(io.Discard)
	if writer.HasWritten() {
		t.Error("WriteOnCloser must not be marked as HasWritten")
	}
	writer.Write(nil)
	if !writer.HasWritten() {
		t.Error("WriteOnCloser must be marked as HasWritten")
	}

	writer = WriteOnClose(io.Discard)
	writer.Close()
	if !writer.HasWritten() {
		t.Error("WriteOnCloser must be marked as HasWritten")

	r, err := client.GetObject(ctx, bucket, object, minio.GetObjectOptions{})
	if err != nil {
		c.Fatalf("user was unable to download the object: %v", err)
	}
	defer r.Close()

	_, err = io.Copy(io.Discard, r)
	if err != nil {
		c.Fatalf("user was unable to download the object: %v", err)
	}
}

func (c *check) mustHeadObject(ctx context.Context, client *minio.Client, bucket, object string, tagCount int) {

	enc := json.NewEncoder(w)
	if err := enc.Encode(madmin.ClientPerfExtraTime{TimeSpent: atomic.LoadInt64(&globalLastClientPerfExtraTime)}); err != nil {
		return
	}
}

// ClientDevNull - everything goes to io.Discard
// [POST] /minio/admin/v3/speedtest/client/devnull
func (a adminAPIHandlers) ClientDevNull(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()

	timeStart := time.Now()

// The s3ChunkedReader returns io.EOF when the final 0-length chunk is read.
func newUnsignedV4ChunkedReader(req *http.Request, trailer bool) (io.ReadCloser, APIErrorCode) {
	if trailer {
		// Discard anything unsigned.
		req.Trailer = make(http.Header)
		trailers := req.Header.Values(awsTrailerHeader)
		for _, key := range trailers {
			req.Trailer.Add(key, "")
		}
	} else {
		req.Trailer = nil
	}