Avoid allocation storing last active time

candidate_base.go

@@ -31,8 +31,8 @@ type candidateBase struct {
 
 	resolvedAddr net.Addr
 
-	lastSent     atomic.Value
-	lastReceived atomic.Value
+	lastSent     atomic.Int64
+	lastReceived atomic.Int64
 	conn         net.PacketConn
 
 	currAgent *Agent
@@ -409,27 +409,27 @@ func (c *candidateBase) String() string {
 // LastReceived returns a time.Time indicating the last time
 // this candidate was received
 func (c *candidateBase) LastReceived() time.Time {
-	if lastReceived, ok := c.lastReceived.Load().(time.Time); ok {
-		return lastReceived
+	if lastReceived := c.lastReceived.Load(); lastReceived != 0 {
+		return time.Unix(0, lastReceived)
 	}
 	return time.Time{}
 }
 
 func (c *candidateBase) setLastReceived(t time.Time) {
-	c.lastReceived.Store(t)
+	c.lastReceived.Store(t.UnixNano())
 }
 
 // LastSent returns a time.Time indicating the last time
 // this candidate was sent
 func (c *candidateBase) LastSent() time.Time {
-	if lastSent, ok := c.lastSent.Load().(time.Time); ok {
-		return lastSent
+	if lastSent := c.lastSent.Load(); lastSent != 0 {
+		return time.Unix(0, lastSent)
 	}
 	return time.Time{}
 }
 
 func (c *candidateBase) setLastSent(t time.Time) {
-	c.lastSent.Store(t)
+	c.lastSent.Store(t.UnixNano())
 }
 
 func (c *candidateBase) seen(outbound bool) {

candidate_test.go

@@ -186,7 +186,7 @@ func TestCandidateLastSent(t *testing.T) {
 	require.Equal(t, candidate.LastSent(), time.Time{})
 	now := time.Now()
 	candidate.setLastSent(now)
-	require.Equal(t, candidate.LastSent(), now)
+	require.EqualValues(t, 0, now.Sub(candidate.LastSent()))
 }
 
 func TestCandidateLastReceived(t *testing.T) {
@@ -194,7 +194,7 @@ func TestCandidateLastReceived(t *testing.T) {
 	require.Equal(t, candidate.LastReceived(), time.Time{})
 	now := time.Now()
 	candidate.setLastReceived(now)
-	require.Equal(t, candidate.LastReceived(), now)
+	require.EqualValues(t, 0, now.Sub(candidate.LastReceived()))
 }
 
 func TestCandidateFoundation(t *testing.T) {