Adding upstream version 2.52.6.

Signed-off-by: Daniel Baumann <daniel@debian.org>

utils/time_test.go

@@ -0,0 +1,48 @@
+package utils
+
+import (
+	"sync/atomic"
+	"testing"
+	"time"
+)
+
+func checkTimeStamp(tb testing.TB, expectedCurrent, actualCurrent uint32) { //nolint:thelper // TODO: Verify if tb can be nil
+	if tb != nil {
+		tb.Helper()
+	}
+	// test with some buffer in front and back of the expectedCurrent time -> because of the timing on the work machine
+	AssertEqual(tb, true, actualCurrent >= expectedCurrent-1 || actualCurrent <= expectedCurrent+1)
+}
+
+func Test_TimeStampUpdater(t *testing.T) {
+	t.Parallel()
+
+	StartTimeStampUpdater()
+
+	now := uint32(time.Now().Unix())
+	checkTimeStamp(t, now, atomic.LoadUint32(&Timestamp))
+	// one second later
+	time.Sleep(1 * time.Second)
+	checkTimeStamp(t, now+1, atomic.LoadUint32(&Timestamp))
+	// two seconds later
+	time.Sleep(1 * time.Second)
+	checkTimeStamp(t, now+2, atomic.LoadUint32(&Timestamp))
+}
+
+func Benchmark_CalculateTimestamp(b *testing.B) {
+	StartTimeStampUpdater()
+
+	var res uint32
+	b.Run("fiber", func(b *testing.B) {
+		for n := 0; n < b.N; n++ {
+			res = atomic.LoadUint32(&Timestamp)
+		}
+		checkTimeStamp(b, uint32(time.Now().Unix()), res)
+	})
+	b.Run("default", func(b *testing.B) {
+		for n := 0; n < b.N; n++ {
+			res = uint32(time.Now().Unix())
+		}
+		checkTimeStamp(b, uint32(time.Now().Unix()), res)
+	})
+}