xA: limit buffer length

xA/xA.go

@@ -375,6 +375,17 @@ func bufferToggleUnimportant(name string) {
 	}, nil)
 }
 
+func bufferPushLine(b *buffer, line bufferLine) {
+	b.lines = append(b.lines, line)
+
+	// Fyne's text layouting is extremely slow.
+	// The limit could be made configurable,
+	// and we could use a ring buffer approach to storing the lines.
+	if len(b.lines) > 100 {
+		b.lines = slices.Delete(b.lines, 0, 1)
+	}
+}
+
 // --- Current buffer ----------------------------------------------------------
 
 func bufferToggleLogFinish(err string, response *RelayResponseDataBufferLog) {
@@ -755,7 +766,7 @@ func relayProcessBufferLine(b *buffer, m *RelayEventDataBufferLine) {
 	// Initial sync: skip all other processing, let highlights be.
 	bc := bufferByName(bufferCurrent)
 	if bc == nil {
-		b.lines = append(b.lines, line)
+		bufferPushLine(b, line)
 		return
 	}
 
@@ -767,7 +778,7 @@ func relayProcessBufferLine(b *buffer, m *RelayEventDataBufferLine) {
 	separate := display &&
 		!visible && bc.newMessages == 0 && bc.newUnimportantMessages == 0
 
-	b.lines = append(b.lines, line)
+	bufferPushLine(b, line)
 	if !(visible || m.LeakToActive) ||
 		b.newMessages != 0 || b.newUnimportantMessages != 0 {
 		if line.isUnimportant || m.LeakToActive {
@@ -780,7 +791,7 @@ func relayProcessBufferLine(b *buffer, m *RelayEventDataBufferLine) {
 	if m.LeakToActive {
 		leakedLine := line
 		leakedLine.leaked = true
-		bc.lines = append(bc.lines, leakedLine)
+		bufferPushLine(bc, leakedLine)
 
 		if !visible || bc.newMessages != 0 || bc.newUnimportantMessages != 0 {
 			if line.isUnimportant {