I didn't quite understand how this fixes the performance issue, but I'm happy that it does. :)

I've given you access here and on Hackage in case you'd like to make a release.

Cheers!

Ah, I get it now: Since bind handles Globals, it needs to traverse more of the syntax, but in this case that is redundant.

Yea, exactly that. I could never exactly figure out what bind was for (I don't use it at all in my generator, afaik), but this little manual definition seems to do the job nicely.

I've given you access here and on Hackage in case you'd like to make a release.

Thanks, I'll cut a minor release with this change

bind allows substituting globals (as well as variables) which is sometimes useful.