Paredit, smartparens very slow with large latex files

[Julien Cubizolles]

All the minor modes I've tried to navigate through sexps are very slow
when working with large latex files (>1000 lines). For example
sp-forward-sexp takes several seconds to do the following:
\(|\) -> \(\)| whereas it's instantaneous in a small buffer. Is there a
way to improve things ? I tried folding parts of the buffer but it
doesn't help since the folded part is still parsed.

Julien.