diff --git a/oviewer/event.go b/oviewer/event.go
index 02e35e47..0eada893 100644
--- a/oviewer/event.go
+++ b/oviewer/event.go
@@ -45,9 +45,9 @@ func (root *Root) eventLoop(ctx context.Context, quitChan chan<- struct{}) {
 		case *eventCloseDocument:
 			root.closeDocument()
 		case *eventCopySelect:
-			root.putClipboard(ctx)
+			root.copyToClipboard(ctx)
 		case *eventPaste:
-			root.getClipboard(ctx)
+			root.pasteFromClipboard(ctx)
 		case *eventViewMode:
 			root.setViewMode(ev.value)
 		case *eventInputSearch:
diff --git a/oviewer/logdoc.go b/oviewer/logdoc.go
index 3354c9e1..615b6d2b 100644
--- a/oviewer/logdoc.go
+++ b/oviewer/logdoc.go
@@ -29,15 +29,16 @@ func (m *Document) Write(p []byte) (int, error) {
 	s := m.store
 	chunk := s.chunkForAdd(false, s.size)
 	s.append(chunk, true, p)
-	if len(chunk.lines) >= ChunkSize {
-		chunk = NewChunk(s.size)
-		s.mu.Lock()
-		if len(s.chunks) > 2 {
-			s.chunks[len(s.chunks)-2].lines = nil
-			atomic.StoreInt32(&s.startNum, int32(ChunkSize*(len(s.chunks)-1)))
-		}
-		s.chunks = append(s.chunks, chunk)
-		s.mu.Unlock()
+	if len(chunk.lines) < ChunkSize {
+		return len(p), nil
 	}
+	chunk = NewChunk(s.size)
+	s.mu.Lock()
+	if len(s.chunks) > 2 {
+		s.chunks[len(s.chunks)-2].lines = nil
+		atomic.StoreInt32(&s.startNum, int32(ChunkSize*(len(s.chunks)-1)))
+	}
+	s.chunks = append(s.chunks, chunk)
+	s.mu.Unlock()
 	return len(p), nil
 }
diff --git a/oviewer/mouse.go b/oviewer/mouse.go
index 655afa59..97559acb 100644
--- a/oviewer/mouse.go
+++ b/oviewer/mouse.go
@@ -152,8 +152,8 @@ func (root *Root) sendCopySelect() {
 	root.postEvent(ev)
 }
 
-// putClipboard writes the selection to the clipboard.
-func (root *Root) putClipboard(_ context.Context) {
+// copyToClipboard writes the selection to the clipboard.
+func (root *Root) copyToClipboard(_ context.Context) {
 	x1 := root.x1
 	x2 := root.x2
 	y1 := root.y1
@@ -170,7 +170,7 @@ func (root *Root) putClipboard(_ context.Context) {
 	}
 	buff, err := root.rangeToString(x1, y1, x2, y2)
 	if err != nil {
-		root.debugMessage(fmt.Sprintf("putClipboard: %s", err.Error()))
+		root.debugMessage(fmt.Sprintf("copyToClipboard: %s", err.Error()))
 		return
 	}
 
@@ -178,7 +178,7 @@ func (root *Root) putClipboard(_ context.Context) {
 		return
 	}
 	if err := clipboard.WriteAll(buff); err != nil {
-		log.Printf("putClipboard: %v", err)
+		log.Printf("copyToClipboard: %v", err)
 	}
 	root.setMessage("Copy")
 }
@@ -201,8 +201,8 @@ func (root *Root) sendPaste() {
 	root.postEvent(ev)
 }
 
-// getClipboard writes a string from the clipboard.
-func (root *Root) getClipboard(_ context.Context) {
+// pasteFromClipboard writes a string from the clipboard.
+func (root *Root) pasteFromClipboard(_ context.Context) {
 	input := root.input
 	switch input.Event.Mode() {
 	case Normal:
@@ -211,7 +211,7 @@ func (root *Root) getClipboard(_ context.Context) {
 
 	str, err := clipboard.ReadAll()
 	if err != nil {
-		log.Printf("getClipboard: %v", err)
+		log.Printf("pasteFromClipboard: %v", err)
 		return
 	}
 
diff --git a/oviewer/search.go b/oviewer/search.go
index 0579ff8b..bc316e46 100644
--- a/oviewer/search.go
+++ b/oviewer/search.go
@@ -224,7 +224,6 @@ func condRegexpCompile(in string) *regexp.Regexp {
 }
 
 // searchPosition returns the position where the search in the argument line matched.
-// searchPosition uses cache.
 func (root *Root) searchPosition(lN int, str string) [][]int {
 	return root.searcher.FindAll(str)
 }