Question about PlainTextEdit and TextEdit

[Black Cat]

How much character input per second the QPlainTextEdit and the TextEdit accept? I'm working with the PlainTextEdit and if I try to input much character per second my software crash and it return:

"Process finished with exit code -1073741819"

For much inputs of character per second is recommended QPlainTextEdit, TextEdit or TextBrowser or a Label?

[aha_1980]

@Black-Cat

my software crash and it return:

please show your code.

Regards