Not sure if this is the best forum, since I am referring to regular expressions in syntax (esy) files, and not for Find and Replace.

I've discovered that with more than two or three regular expressions for syntax highlighting, EmEditor performance suffers a noticeable hit. Keystrokes have a delay, other windows flicker, and the the CPU activity spikes to 80% if the user is typing very fast (or backspaces through half a sentence) and the document has a couple hundred lines.

I can post some specific examples, but I think this is a general issue. I read a few other posts along the same lines. But what really alerted my attention was skimming through several of the posted syntax files, and seeing that very few make use of regular expressions.

EmEditor is a fantasitic software, so this is not a complaint. Rather I would like to know:
1. Is there any tips or tricks to improve performance? (For example, I noticed that an RE that spans an entire line (^....something...$) does not have as bad a hit as expressions looking for in-line patterns.
2. Should I attempt to accomplish this with a macro that is somehow on a timer, so that the highlight engine does not kick off on every keystroke?
3. Is there a setting I am missing, similar to the AutoComplete configuration, where one can set a timer for scanning and refresh delays?

Thanks!