Large text document slow to display

I imported a plain text document that’s about 5 MB in size. It takes DT at least 30 seconds to display the text completely (i.e., when scrolling the document is not jerky). Is this typical for large documents in DT? The same document opens quickly in BBEdit or TextEdit with no scrolling delay. I checked “Exclude from classification” hoping that would speed things up, but it didn’t.

Thanks for any insight.

Did you activate automatic Wiki links? Maybe this is causing the delay (because the performance should be more or less identical to TextEdit otherwise).