> On 19 Apr 2016, at 20:37, Michael Kay mike@xxxxxxxxxxxx
<xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> With any exercise looking at a possible course of action to improve
performance, you need to start with measurements and targets. What is your
current performance, how far does it fall short of requirements?

With big data sources it can be worthwhile starting point to find how much
time would be taken by a pure 'identity' transform.... one that merely
repeatedly copies and applies templates... That will give you a sense of how
much computation is going on.