& XSLT >      Dimitre> I have discussed this problem with Michael Kay before. A
>      Dimitre> compromise we agreed upon was not to memorize every
>      Dimitre> sequence-argument but just the ID of
>      Dimitre> the sequence.
>  
>  What do you mean by the ID?


I realize that this is implementation-dependent, but it is practical not
to pass long sequences by value. Instead, they can be passed by reference.
The reference is what I was referring to as the "ID" of the sequence.

Cheers,
Dimitre Novatchev

--- Colin Paul Adams <colin@[...].uk>  wrote:

>  >>>>> "Dimitre" == Dimitre Novatchev <dnovatchev@[...].com> writes:
>  
>      Dimitre> Subject: Re: Function memoization To:
>      Dimitre> exslt@[...].com
>  
>      >> If the function is called again with the same values for the
>      >> arguments, it MUST return the remembered result.  It MUST NOT
>      >> re-execute the function body, as this can cause different
>      >> results in some cases.
>  
>      Dimitre> We must define well what "the same values for the
>      Dimitre> arguments" means.
>  
>      Dimitre> It is impractical to remember and compare long sequences
>      Dimitre> -- this may require excessive amounts of memory and may
>      Dimitre> lead to slower execution than without any memoisation.
>  
>  
>      Dimitre> I have discussed this problem with Michael Kay before. A
>      Dimitre> compromise we agreed upon was not to memorize every
>      Dimitre> sequence-argument but just the ID of
>      Dimitre> the sequence.
>  
>  What do you mean by the ID?
>  
>  
>  -- 
>  Colin Adams
>  Preston Lancashire
>  


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