calling a template and xsl:include

Hi all,
I have 2 questions:
I remember that I once saw somewhere a snippet of XSLT code about
calling a template having the name in a variable, something like this:

<xsl:call-template select="$tempalteToCall"/>

As far as I know this can't be done with XSLT 1.0, but there was a
work-around to do so. Any one know how to do that or where to find
info about that? It would help.

The other question is about performance. I use many xsl:include and I
would like to know if this could cause some notable performance issue
on the processor?

Thanks.
Bye

Francesco.
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