Tim Hunt

On the Moodle demo site (https://qa.moodledemo.net/question/bank/managecategories/category.php?cmid=1227) it seems fast. So, what is it about your site that makes it slow?

If you can reproduce why it is slow, then that is probably a bug, and should be reported to the bug tracker.

You are correct. We had to hack some core code to get this in one place where we really needed it, but mostly, you don't actually need it.

This is feature request MDL-77812, which someone started working on, but never completed. Would still be good if someone could finish it.

This looks like either MDL-84327 or MDL-86816.

It is acutally a bit more subtle than that.

It is a feature of these question types that they allow a very small subset of HTML (like bold, italic, superscript and subscript). So, that is why < is interpreted as part of a HTML tag. (This is, indeed, subject to careful sanisisation / validation.)