For example, to return a sequence of all items but the last [sic: first],
which of the following is better?
$x[ position() > 1 ]
or
remove( $x , 1 )
It's impossible to say in general, it's processor-dependent. Saxon compiles
both of these into exactly the same code, effectively an expression
tail($x). This construct is specially recognized at run-time to avoid
copying the sequence unnecessarily.
Use saxon:explain="yes" if you're interested in details of how Saxon has
compiled the code.
Michael Kay
http://www.saxonica.com/
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