Efficiency of xsl:number with the "value" attribute sp

I have heard of recommendations to avoid xsl:number if possible, due to efficiency
reasons.

However, the processing of xsl:number falls into two separate distinct cases -- when
the number is already supplied in the "value" attribute, and when not.

My question is should I be concerned (so much, or at all) about efficiency, in case
when I'm using the "value" attribute to specify the number.

Thanks in advance,

Dimitre Novatchev.

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