diff --git a/cache_test.go b/cache_test.go
index d02ad84..3579fcc 100644
--- a/cache_test.go
+++ b/cache_test.go
@@ -1648,9 +1648,33 @@ func BenchmarkDeleteExpiredLoop(b *testing.B) {
 	}
 }
 
-func BenchmarkLargeCache(b *testing.B) {
+func BenchmarkLargeCache01(b *testing.B) {
+	benchmarkLargeCache(b, 100000)	
+}
+
+func BenchmarkLargeCache02(b *testing.B) {
+	benchmarkLargeCache(b, 200000)	
+}
+
+func BenchmarkLargeCache05(b *testing.B) {
+	benchmarkLargeCache(b, 500000)	
+}
+
+func BenchmarkLargeCache10(b *testing.B) {
+	benchmarkLargeCache(b, 1000000)	
+}
+
+func BenchmarkLargeCache20(b *testing.B) {
+	benchmarkLargeCache(b, 2000000)	
+}
+
+func BenchmarkLargeCache50(b *testing.B) {
+	benchmarkLargeCache(b, 5000000)	
+}
+
+func benchmarkLargeCache(b *testing.B, nano int) {
 	b.StopTimer()
-	tc := New(100*time.Millisecond, 1*time.Millisecond)
+	tc := New(100*time.Millisecond, time.Duration(nano)*time.Nanosecond)
 	b.StartTimer()
 	b.N = 1000000
 	for i := 0; i < b.N; i++ {