XEmacs equivalent of emacs mode line data?

[Raymond Toy]

 On 8/21/10 10:40 AM, Aidan Kehoe wrote:
>  Ar an naoú lá déag de mí Lúnasa, scríobh Raymond Toy: 
>
>  >  Does xemacs have some equivalent of emacs :eval form for mode line
>  > data, as mentioned here:
>  > <http://www.gnu.org/software/emacs/elisp/html_node/Mode-Line-Data.html>
>  > 
>  > This shows up in slime where currently slime updates the modeline by
>  > scanning every buffer to see if it is in slime-mode and updating the
>  > modeline appropriately.  When there are a dozen buffers or more, slime
>  > drastically slows down.
>
> There isn’t yet. I would be shocked if were absolutely necessary, though;
> does replacing #'slime-recompute-modelines with the below (untested, I
> haven’t used slime much) improve things for you? And yes, byte-compilation
> is the way to go!

[snip code]

This seems to work very well, even without byte-compiling the code.

Thank you very much for this.  I'll send it off to the slime guys so
they can incorporate this code into slime.

Many thanks!

Ray