On Fri, Mar 14, 2025 at 04:48:23PM -0000, Michael Kay mike@xxxxxxxxxxxx scripsit:
> > Tangentially, is there a use case where xsl:key is expected to be
> > preferable in performance terms to using maps?
> 
> No, I don't think so. Some people may find keys more intuitive, and they're probably easier to manage if you need one-index-per-document with multiple documents, but I don't think they will ever give a performance benefit.
> 
> Haven't measured it though.
> 
> One exception may be where you use the same "lookup document" for multiple transformations using the same stylesheet - Saxon will then try to reuse the xsl:key index. But you can organize that for yourself using maps quite easily -- the simplest way of doing it is simply to pass a parsed JSON document as the lookup index.

Thank you!

Appreciate the information.

-- Graydon

--  
Graydon Saunders  | graydonish@xxxxxxxxxxxx
\xDE\xE6s ofer\xE9ode, \xF0isses sw\xE1 m\xE6g.
-- Deor  ("That passed, so may this.")