Hi, at the meantime i wrote a small test programm where it does the following:
while (indexCounter < maxIndexCount) { var timestamp = (String.Format("{0:yyMMdd HH:mm:ss:fff}", DateTime.Now)); rtxtOutput.AppendText(indexCounter + " " + timestamp + " This is a output text to test the output time.\n"); indexCounter++; Thread.Sleep(1); } So the while loop do nothing more, than writing the actual timestamp to the textbox, sleep 1ms and write the next text out. If i do this with mono, i have a time differents of ~ 15-20ms , in windows it is around 1-2ms. The Richtextbox is all with the default settings. Does anyone knows how to get a better performance here? -- View this message in context: http://mono.1490590.n4.nabble.com/Too-slow-performance-on-RichTextBox-tp4485123p4508543.html Sent from the Mono - WinForms mailing list archive at Nabble.com. _______________________________________________ Mono-winforms-list maillist - Mono-winforms-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-winforms-list