For example, you could add a custom header `X-Process-Time` containing the time in seconds that it took to process the request and generate a response:

{* ../../docs_src/middleware/tutorial001_py310.py hl[10,12:13] *}

/// tip

Here we use [`time.perf_counter()`](https://docs.python.org/3/library/time.html#time.perf_counter) instead of `time.time()` because it can be more precise for these use cases. 🤓

///

	// Copy request.
	req := *r

	// Save authorization header.
	v4Auth := req.Header.Get(xhttp.Authorization)

	// Parse signature version '4' header.
	signV4Values, errCode := parseSignV4(v4Auth, globalSite.Region(), serviceS3)
	if errCode != ErrNone {
		return cred, "", "", time.Time{}, errCode
	}

	// Payload streaming.

func (role Role) IsAdmin() bool {
	return role.Name == "admin"
}

type EmptyTime struct {
	time.Time
}

func (t *EmptyTime) Scan(v interface{}) error {
	nullTime := sql.NullTime{}
	err := nullTime.Scan(v)
	t.Time = nullTime.Time
	return err
}

func (t EmptyTime) Value() (driver.Value, error) {
	return time.Now() /* pass tests, mysql 8 doesn't support 0000-00-00 by default */, nil
}

		Store:         store,
		CommitTimeout: 5 * time.Minute,
		Log: func(ctx context.Context, err error, id string, errKind ...any) {
			t.Log([]any{err, id, errKind}...)
		},
	})

	for i := 0; i < int(limit); i++ {
		if err := batch.Add(testItem); err != nil {
			t.Fatalf("failed to add %v; %v", i, err)
		}
	}

	batch.Close()
	time.Sleep(1 * time.Second)

	batchLen := batch.Len()

}

// NextDue returns upcoming DelMarkerExpiration date for obj if
// applicable, returns false otherwise.
func (de DelMarkerExpiration) NextDue(obj ObjectOpts) (time.Time, bool) {
	if !obj.IsLatest || !obj.DeleteMarker {
		return time.Time{}, false
	}

	return ExpectedExpiryTime(obj.ModTime, de.Days), true

// callhomeCycleDefault is the default interval between two callhome cycles (24hrs)
const callhomeCycleDefault = 24 * time.Hour

// Config represents the subnet related configuration
type Config struct {
	// Flag indicating whether callhome is enabled.
	Enable bool `json:"enable"`

	// The interval between callhome cycles
	Frequency time.Duration `json:"frequency"`
}

var configLock sync.RWMutex

		qCache:          newQueueCache(r),
		pCache:          newProxyStatsCache(),
		srStats:         newSRStats(),
		movingAvgTicker: time.NewTicker(2 * time.Second),
		wTimer:          time.NewTicker(2 * time.Second),
		qTimer:          time.NewTicker(2 * time.Second),

		workers:  newActiveWorkerStat(r),
		registry: r,
	}
	go rs.collectWorkerMetrics(ctx)
	go rs.collectQueueMetrics(ctx)
	return &rs

# special script :: absolute mode: $(2014/07/10), relative mode: addDay(3).addMonth(4)
# The milliseconds for (relative or absolute) adjust time (set only when test) @LongType *dynamic in development
time.adjust.time.millis = 0

# ----------------------------------------------------------
#                                                      Mail

# special script :: absolute mode: $(2014/07/10), relative mode: addDay(3).addMonth(4)
# The milliseconds for (relative or absolute) adjust time (set only when test) @LongType *dynamic in development
time.adjust.time.millis = 0

# ----------------------------------------------------------
#                                                      Mail

		Transport: &http.Transport{
			Proxy: http.ProxyFromEnvironment,
			DialContext: (&net.Dialer{
				Timeout:   3 * time.Second,
				KeepAlive: 5 * time.Second,
			}).DialContext,
			ResponseHeaderTimeout: 3 * time.Second,
			TLSHandshakeTimeout:   3 * time.Second,
			ExpectContinueTimeout: 3 * time.Second,
			TLSClientConfig: &tls.Config{
				RootCAs: args.rootCAs,
			},