As Mike has mentioned in an earlier message we are currently investigating an  performance anomaly on SAxon .NET.

What is interesting is the time spent 'Waiting for synchronisation'

I came across this in my own profiling and it is still puzzling me what this exactly means because it seems most of the time is spent on this synchronisation thread.

Kind regards,


On 26/09/13 13:52, Emanuel Wlaschitz wrote:
I'm not exactly sure if this helps, but I've ran some tests using Docbook 5:
The definitive Guide and the official XSLT 2.0 stylesheets.

transform.exe* with about 2 seconds vs. the Api approach with about 8
In the profiler, the time required to run the two is somewhere around 12 vs.
20 seconds (due to profiler overhead). I hope the results come thru, I tried
to attach them as zip (which are the results exported from RedGate ANTS
Performance Profiler 8.2 as both XML and HTML, for transform.exe and
Saxon.Api respectively), but I can't tell if they really end up on the list.
The time spent in Controller.transform differs by about a second between the
two, or even 4 seconds looking at wall-clock time (including the time
waiting for synchronization).
I don't know what that could mean, or if it would mean anything, as the
stacktrace simply looks like XSL processing (duh).

My testcase is still running with the profiler, and I don't expect it to
finish within the next hour, but I'll keep you posted on anything I might
see in there.

*) Actually, I didn't profile transform.exe, but I used two methods in my
test program. Transform is the one I posted earlier (using Saxon.Api), while
TransformDirect uses Transform.doTransform just like transform.exe does (and
it really gets the same performance there).

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O'Neil Delpratt
Software Developer, Saxonica Limited
Tel: +44 118 946 5894
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