diff --git a/log_test.go b/log_test.go
index ba177ec..a82cbab 100644
--- a/log_test.go
+++ b/log_test.go
@@ -152,3 +152,54 @@ func TestDefaultLogger(t *testing.T) {
 	l.Warn("TestDefaultLogger")
 	l.Info("TestDefaultLogger")
 }
+
+func BenchmarkDefault(b *testing.B) {
+	SetErrOutput(io.Discard)
+	SetOutput(io.Discard)
+	Reload()
+	LEVEL = 15
+	for i := 0; i < b.N; i++ {
+		PROD = true
+		Error("err in", "BenchmarkDefault: ", i)
+		ErrorF(H{"test": "fields"}, "err in", "BenchmarkDefault: ", i)
+		Debug("err in", "BenchmarkDefault: ", i)
+		DebugF(H{"test": "fields"}, "err in", "BenchmarkDefault: ", i)
+		Warn("err in", "BenchmarkDefault: ", i)
+		WarnF(H{"test": "fields"}, "err in", "BenchmarkDefault: ", i)
+	}
+	for i := 0; i < b.N; i++ {
+		PROD = false
+		Error("err in", "BenchmarkDefault: ", i)
+		ErrorF(H{"test": "fields"}, "err in", "BenchmarkDefault: ", i)
+		Debug("err in", "BenchmarkDefault: ", i)
+		DebugF(H{"test": "fields"}, "err in", "BenchmarkDefault: ", i)
+		Warn("err in", "BenchmarkDefault: ", i)
+		WarnF(H{"test": "fields"}, "err in", "BenchmarkDefault: ", i)
+	}
+}
+
+func BenchmarkSub1(b *testing.B) {
+	LEVEL = 15
+	l := Sub("Sub1")
+	l.SetErrOutput(io.Discard)
+	l.SetOutput(io.Discard)
+	l.Reload()
+	for i := 0; i < b.N; i++ {
+		PROD = true
+		l.Error("err in", "BenchmarkDefault: ", i)
+		l.ErrorF(H{"test": "fields"}, "err in", "BenchmarkSub1: ", i)
+		l.Debug("err in", "BenchmarkDefault: ", i)
+		l.DebugF(H{"test": "fields"}, "err in", "BenchmarkSub1: ", i)
+		l.Warn("err in", "BenchmarkDefault: ", i)
+		l.WarnF(H{"test": "fields"}, "err in", "BenchmarkSub1: ", i)
+	}
+	for i := 0; i < b.N; i++ {
+		PROD = false
+		l.Error("err in", "BenchmarkDefault: ", i)
+		l.ErrorF(H{"test": "fields"}, "err in", "BenchmarkSub1: ", i)
+		l.Debug("err in", "BenchmarkDefault: ", i)
+		l.DebugF(H{"test": "fields"}, "err in", "BenchmarkSub1: ", i)
+		l.Warn("err in", "BenchmarkDefault: ", i)
+		l.WarnF(H{"test": "fields"}, "err in", "BenchmarkSub1: ", i)
+	}
+}