Add benchmarks that use expiring items (time.Now calls) and rename BenchmarkDeleteExpired to BenchmarkDeleteExpiredLoop for clarity

cache_test.go

@@ -1425,9 +1425,17 @@ func TestSerializeUnserializable(t *testing.T) {
 	}
 }
 
-func BenchmarkCacheGet(b *testing.B) {
+func BenchmarkCacheGetExpiring(b *testing.B) {
+	benchmarkCacheGet(b, 5 * time.Minute)
+}
+
+func BenchmarkCacheGetNotExpiring(b *testing.B) {
+	benchmarkCacheGet(b, NoExpiration)
+}
+
+func benchmarkCacheGet(b *testing.B, exp time.Duration) {
 	b.StopTimer()
-	tc := New(DefaultExpiration, 0)
+	tc := New(exp, 0)
 	tc.Set("foo", "bar", DefaultExpiration)
 	b.StartTimer()
 	for i := 0; i < b.N; i++ {
@@ -1449,9 +1457,17 @@ func BenchmarkRWMutexMapGet(b *testing.B) {
 	}
 }
 
-func BenchmarkCacheGetConcurrent(b *testing.B) {
+func BenchmarkCacheGetConcurrentExpiring(b *testing.B) {
+	benchmarkCacheGetConcurrent(b, 5 * time.Minute)
+}
+
+func BenchmarkCacheGetConcurrentNotExpiring(b *testing.B) {
+	benchmarkCacheGetConcurrent(b, NoExpiration)
+}
+
+func benchmarkCacheGetConcurrent(b *testing.B, exp time.Duration) {
 	b.StopTimer()
-	tc := New(DefaultExpiration, 0)
+	tc := New(exp, 0)
 	tc.Set("foo", "bar", DefaultExpiration)
 	wg := new(sync.WaitGroup)
 	workers := runtime.NumCPU()
@@ -1493,13 +1509,21 @@ func BenchmarkRWMutexMapGetConcurrent(b *testing.B) {
 	wg.Wait()
 }
 
-func BenchmarkCacheGetManyConcurrent(b *testing.B) {
+func BenchmarkCacheGetManyConcurrentExpiring(b *testing.B) {
+	benchmarkCacheGetManyConcurrent(b, 5 * time.Minute)
+}
+
+func BenchmarkCacheGetManyConcurrentNotExpiring(b *testing.B) {
+	benchmarkCacheGetManyConcurrent(b, NoExpiration)
+}
+
+func benchmarkCacheGetManyConcurrent(b *testing.B, exp time.Duration) {
 	// This is the same as BenchmarkCacheGetConcurrent, but its result
 	// can be compared against BenchmarkShardedCacheGetManyConcurrent
 	// in sharded_test.go.
 	b.StopTimer()
 	n := 10000
-	tc := New(DefaultExpiration, 0)
+	tc := New(exp, 0)
 	keys := make([]string, n)
 	for i := 0; i < n; i++ {
 		k := "foo" + strconv.Itoa(n)
@@ -1521,9 +1545,17 @@ func BenchmarkCacheGetManyConcurrent(b *testing.B) {
 	wg.Wait()
 }
 
-func BenchmarkCacheSet(b *testing.B) {
+func BenchmarkCacheSetExpiring(b *testing.B) {
+	benchmarkCacheSet(b, 5 * time.Minute)
+}
+
+func BenchmarkCacheSetNotExpiring(b *testing.B) {
+	benchmarkCacheSet(b, NoExpiration)
+}
+
+func benchmarkCacheSet(b *testing.B, exp time.Duration) {
 	b.StopTimer()
-	tc := New(DefaultExpiration, 0)
+	tc := New(exp, 0)
 	b.StartTimer()
 	for i := 0; i < b.N; i++ {
 		tc.Set("foo", "bar", DefaultExpiration)
@@ -1602,7 +1634,7 @@ func BenchmarkIncrementInt(b *testing.B) {
 	}
 }
 
-func BenchmarkDeleteExpired(b *testing.B) {
+func BenchmarkDeleteExpiredLoop(b *testing.B) {
 	b.StopTimer()
 	tc := New(5 * time.Minute, 0)
 	tc.mu.Lock()