Re: imenu fails in mode without comment-start-skip defined

[Dave Love]

Richard Stallman <address@hidden> writes:

>     Python mode's Imenu code uses it (implicitly if I remember correctly).
>
> We cannot deduce any firm conclusion about the code
> in Imenu from that information.  They may be different in other ways.

Well, it's easy to measure.  Using syntax-ppss instead of the current
code makes imenu--make-index-alist 4 times faster when run on
simple.el (rather surprisingly).  It's 50% slower than without any
check on the context.