We have more free web server CPU then we did before, but not that much more. Also, as more uses come to the site, that free CPU will become less free.
On my system, rendering the snippet I posted in this thread can be done 575 times per CPU second on my loaded system. I think nodes get updated much less often and am assuming the PM webserver(s) is/are better than mine.
Should it *become* a problem, you can always turn it off later. It's not as if adding or removing this feature is a lot of work, given that code that implements it is already available.
Anyway, as castaway just pointed out to me, a lot of stuff gets put in <code> tags that is not /perl/ code.
So? There will be some coloured words and characters. That looks funny, but in my opinion is not at all a problem.
If it were a problem, the introduction of a <perl> tag would solve it instantly. But I don't think it is.