How to add text to a text box other than text1.text=text1.text+

[Phil Hall]

Is there a better way to add text to a text box, other than
saying:

text1.text=text1.text + "whatever new text"

I am logging RS232 info coming in, and don't like the
delay I'm seeing from re-writing the entire text box.

I figure there must be a more elegant way of just appending
a new line of text to the bottom of the text box.

Thank you.

Phil Hall