Subject: Re: [xsl] Dynamic pipelining in XSLT 2.0 w/ Saxon extensions From: "Andrew Welch" <andrew.j.welch@xxxxxxxxx> Date: Tue, 19 Jun 2007 16:46:54 +0100 |
Andrew Welch wrote:
Hi
> It does write out each stage of the processing but this is > definitely A Good Thing in my book
In the developer point of view yes, that's a Good Thing. But that depends on the project I think. In a former project, I had to apply a few steps to the input in order to get the final document. The transformation was launched by the user, and he had to wait for the result in order to go further in the workflow.
Of course, as an interactive application, the performance was not as important, but dumping the intermediate trees each time was too eavy (ok, the bigger gain was of course obtained by caching the compiled stylesheets).
Often each stage of the pipeline relies on many (or all) of the input files being at that stage, so in that case they really do need to be written out.
Kernow does several things to make directory transforms as fast as possible - compiling stylesheets, caching resolvers etc. I/O as a bottleneck comes quite far down the list after fetching DTDs from the net etc. I'll get around to making the directory operations multithreaded too which should improve it even further.
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