Performance tip

[Peter R. <php...@pe...>]

Following on from my posting yesterday re speed of 'evaluate', here's a tip 
to all users:

= avoid all inessential evaluates

Given xml structure of many unsorted child nodes which may or may not be 
present, for example:

<topnode>
<a/><d/><q/><m/><c/> etc
</topnode>

and you want the contents of <d> <r> <l> <h> etc

Don't do as I originally did and do an evaluate for each of the 
children. Do an evaluate for all children of <topnode>, then use PHP's array 
functions to find whether a child exists, then getData for those that exist.

This is substantially faster. And if you know a node exists, don't do an 
evaluate at all - just getData.