On Thu, Sep 20, 2012 at 12:11 AM, Michael Kay <mike@xxxxxxxxxxxx> wrote:

>
> The idea of reading the source document using document('') is a hack used in
> XSLT 1.0 to get around the restrictions on using result tree fragments. It
> is never needed in XSLT 2.0: use the global variable directly. (It's also a
> very inefficient hack, because the stylesheet has to be parsed twice.)
>

My benchmarks don't bear that out (To be fair the stylesheet is
compact but still......).
 Higher average execution time when not using doc('') but with a
smaller range and variance (which I haven't calculated but stands to
reason because of the outliers).

Benchmark data

Version with document('')

Ignoring first 2 times
Total Time (last 998 runs): 2 minutes 9 seconds
Average Time (last 998 runs): 129 ms

Only 4 responses above 1 second.
Slowest response 2.75 seconds


Version without document('')

Ignoring first 2 times
Total Time (last 998 runs): 2 minutes 23 seconds
Average Time (last 998 runs): 143 ms

All responses below 1 second
Slowest response 657ms