diff --git a/logger_alert.go b/logger_alert.go
index 291b54e..b6ed88a 100644
--- a/logger_alert.go
+++ b/logger_alert.go
@@ -1,9 +1,6 @@
 package log
 
 func (l myLogger) Alert(a ...interface{}) {
-	if l.Writer == nil {
-		return
-	}
 	if !hasLevel(l.level, alertFlag) {
 		return
 	}
@@ -11,9 +8,6 @@ func (l myLogger) Alert(a ...interface{}) {
 }
 
 func (l myLogger) Alertf(format string, a ...interface{}) {
-	if l.Writer == nil {
-		return
-	}
 	if !hasLevel(l.level, alertFlag) {
 		return
 	}
diff --git a/logger_begin.go b/logger_begin.go
index 8d285cd..54eac56 100644
--- a/logger_begin.go
+++ b/logger_begin.go
@@ -3,7 +3,9 @@ package log
 import "time"
 
 func (l myLogger) Begin(s ...interface{}) Logger {
+	if hasLevel(l.level, logFlag) {
+		l.log(append([]interface{}{"BEGIN"}, s...)...)
+	}
 	logger := myLogger{Writer: l.Writer, prefix: l.prefix, begin: time.Now(), level: l.level}
-	l.log(append([]interface{}{"BEGIN"}, s...)...)
 	return logger
 }
diff --git a/logger_end.go b/logger_end.go
index 5b0a561..e5c8e5a 100644
--- a/logger_end.go
+++ b/logger_end.go
@@ -6,6 +6,8 @@ import (
 )
 
 func (l myLogger) End(s ...interface{}) {
-	var p []interface{} = append([]interface{}{fmt.Sprintf("END δt=%dµs", time.Now().Sub(l.begin)/1000)}, s...)
-	l.log(p...)
+	if hasLevel(l.level, logFlag) {
+		var p []interface{} = append([]interface{}{fmt.Sprintf("END δt=%dµs", time.Now().Sub(l.begin)/1000)}, s...)
+		l.log(p...)
+	}
 }
diff --git a/logger_error.go b/logger_error.go
index f8afd49..58c1bf6 100644
--- a/logger_error.go
+++ b/logger_error.go
@@ -1,9 +1,6 @@
 package log
 
 func (l myLogger) Error(a ...interface{}) {
-	if l.Writer == nil {
-		return
-	}
 	if !hasLevel(l.level, errorFlag) {
 		return
 	}
@@ -11,9 +8,6 @@ func (l myLogger) Error(a ...interface{}) {
 }
 
 func (l myLogger) Errorf(format string, a ...interface{}) {
-	if l.Writer == nil {
-		return
-	}
 	if !hasLevel(l.level, errorFlag) {
 		return
 	}
diff --git a/logger_highlight.go b/logger_highlight.go
index c5de39e..b8f5a24 100644
--- a/logger_highlight.go
+++ b/logger_highlight.go
@@ -1,9 +1,6 @@
 package log
 
 func (l myLogger) Highlight(a ...interface{}) {
-	if l.Writer == nil {
-		return
-	}
 	if !hasLevel(l.level, highlightFlag) {
 		return
 	}
@@ -11,9 +8,6 @@ func (l myLogger) Highlight(a ...interface{}) {
 }
 
 func (l myLogger) Highlightf(format string, a ...interface{}) {
-	if l.Writer == nil {
-		return
-	}
 	if !hasLevel(l.level, highlightFlag) {
 		return
 	}
diff --git a/logger_inform.go b/logger_inform.go
index f6515d9..1549423 100644
--- a/logger_inform.go
+++ b/logger_inform.go
@@ -1,9 +1,6 @@
 package log
 
 func (l myLogger) Inform(a ...interface{}) {
-	if l.Writer == nil {
-		return
-	}
 	if !hasLevel(l.level, informFlag) {
 		return
 	}
@@ -11,9 +8,6 @@ func (l myLogger) Inform(a ...interface{}) {
 }
 
 func (l myLogger) Informf(format string, a ...interface{}) {
-	if l.Writer == nil {
-		return
-	}
 	if !hasLevel(l.level, informFlag) {
 		return
 	}
diff --git a/logger_log.go b/logger_log.go
index edb9ad4..3794cdb 100644
--- a/logger_log.go
+++ b/logger_log.go
@@ -1,9 +1,6 @@
 package log
 
 func (l myLogger) Log(s ...interface{}) {
-	if l.Writer == nil {
-		return
-	}
 	if !hasLevel(l.level, logFlag) {
 		return
 	}
@@ -11,9 +8,6 @@ func (l myLogger) Log(s ...interface{}) {
 }
 
 func (l myLogger) Logf(format string, s ...interface{}) {
-	if l.Writer == nil {
-		return
-	}
 	if !hasLevel(l.level, logFlag) {
 		return
 	}
diff --git a/logger_trace.go b/logger_trace.go
index 11cab71..c401599 100644
--- a/logger_trace.go
+++ b/logger_trace.go
@@ -1,9 +1,6 @@
 package log
 
 func (l myLogger) Trace(a ...interface{}) {
-	if l.Writer == nil {
-		return
-	}
 	if !hasLevel(l.level, traceFlag) {
 		return
 	}
@@ -11,9 +8,6 @@ func (l myLogger) Trace(a ...interface{}) {
 }
 
 func (l myLogger) Tracef(format string, a ...interface{}) {
-	if l.Writer == nil {
-		return
-	}
 	if !hasLevel(l.level, traceFlag) {
 		return
 	}
diff --git a/logger_warn.go b/logger_warn.go
index 7cd5088..db8b110 100644
--- a/logger_warn.go
+++ b/logger_warn.go
@@ -1,9 +1,6 @@
 package log
 
 func (l myLogger) Warn(a ...interface{}) {
-	if l.Writer == nil {
-		return
-	}
 	if !hasLevel(l.level, warnFlag) {
 		return
 	}
@@ -11,9 +8,6 @@ func (l myLogger) Warn(a ...interface{}) {
 }
 
 func (l myLogger) Warnf(format string, a ...interface{}) {
-	if l.Writer == nil {
-		return
-	}
 	if !hasLevel(l.level, warnFlag) {
 		return
 	}