> well, i tried the top down approach code but where can i pass
> my file name let $j:= doc("book_sample.xml")
Just replace
local:pathOfNodes('', /*)
with
local:pathOfNodes('', doc("book_sample.xml")/*)
I was using the context node as input primarily because it makes it easier
to measure tree construction as a separate part of the query cost (having
said which, I need to check if the figures I quoted yesterday included tree
construction or not!)
Michael Kay
http://www.saxonica.com/
>
> --- Michael Kay <mhk-uGS4jv4rpPNaa/9Udqfwiw@xxxxxxxxxxxxxxxx> wrote:
>
> > > I finally got around to running this against the
> > 100Mb data
> > > file with Saxon.
> > > It produces the same size output (don't know why
> > the
> > > expansion factor should be different on the 10Mb
> > file) in 5
> > > minutes 45 seconds.
> > >
> >
> >
> > The equivalent non-recursive query
> >
> > //*/string-join(ancestor-or-self::*/local-name(),
> > '/')
> >
> > (actually a pure XPath expression) takes 2 mins 23 seconds.
> >
> > I also tried a top-down approach, to reduce the number of redundant
> > string concatenations and calls on local-name():
> >
> > declare function local:pathOfNodes($parentPath as
> xs:string, $node as
> > node()) as xs:string* {
> > let $this := concat($parentPath, '/',
> > local-name($node))
> > return ($this, $node/*/local:pathOfNodes($this,
> > .))
> > };
> >
> > local:pathOfNodes('', /*)
> >
> > This took 3m 29s.
> >
> > Michael Kay
> > http://www.saxonica.com/
> >
> >
>
>
>
>
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