Eli Zaretskii <eliz@gnu.org> writes:

> I think we can at most double it at this time.  This is a defcustom,
> so people can always increase it in their local configurations if they
> have much faster machines and need routinely to cope with such large
> parenthetical expressions.

If we're not increasing it that much, can we change the behavior to not
wrongly indicate mismatched parens for expressions where you can't be
sure? Patch is attached.