Subject: Re: [xsl] Using Saxon 2.0 with FOP, XEP, Antenna House From: Michael Kay <mike@xxxxxxxxxxxx> Date: Fri, 18 Oct 2013 20:59:57 +0100 |
On 18 Oct 2013, at 10:34, Jesper Tverskov wrote: > Hi Michael > > When I do a Saxon transformation to XSLFO at the command line, my file takes: > > a) Stopwatch time: 7.5s. > > The "-t" tells me that: > > b) Stylesheet compilation time: 2398ms > c) Building tree input file: 86ms > d) Execution time: 531ms. > > Does it mean that: > > e) start-up time = a - (b+c+d) No, because the VM warms up gradually: it loads classes as they are needed, and the hotspot compiler gradually speeds up the most frequently executed code, learning as it goes. So there's still a lot of "warm-up" happening after Saxon starts the clock. To get timings that eliminate warm-up overhead, you need to use the -repeat option - for something that takes 7s, I would start with -repeat:20. > > Am I right that when doing 1000 transformations with the .NET or Java > Interface, I only have 1 start-up time and 1 compilation time? And > 1000 times c + d? Yes to the first question. To the second, it will probably be rather faster because the first transformation always takes much longer than subsequent ones. > > Also I have tested the loading of a directory and output to directory > feature at the command line in Saxon. It works well, but I don't > think, I can get a FO-processor to take over such an output directory > as input to the FO transformation from within the bat file. > Other possibilities are to organize the processing using XProc, xmlsh, or ant; or to write custom control logic in Java; or to write it in XSLT, with a stylesheet that uses the collection() function to process many input files. Michael Kay Saxonica
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