Re: master df49910: Create a buffer-local binding to improve performance

[Stefan Monnier]

> +  (with-temp-buffer
> +    ;; Each call to ido-ignore-item-p LET-binds case-fold-search.
> +    ;; That is slow if there's no buffer-local binding available,
> +    ;; roughly O(number of buffers).  This hack avoids it.

Hmm... why is it implemented as a DEFVAR_PER_BUFFER?
I think an even better fix is to turn it into a normal DEFVAR_LISP
(together with a `make-variable-buffer-local`).  After all I suspect
that it's rather unusual to set it buffer-locally (it's almost always
let-bound instead).


        Stefan