Re: [xsl] XSLTPROC performance

[Abel Braaksma <abel.online@xxxxxxxxx>]

Colin Paul Adams wrote:
>     Abel> Often, people measure the timing including the startup of
>     Abel> the JVM. If you use Saxon properly, you keep the classes and
>     Abel> the compiled stylesheets in memory. You'll see that this
>     Abel> will improve your performance a lot, especially when talking
>     Abel> about many small XML files.
>
> No it won't, not unless you run it a second time!
>
> So it depends.
>   

Well, what I meant is removing the startup time of the JVM. Suppose you 
run 1000 XML files from the commandline (one "java -jar saxon.jar ..." 
per file), or you run the same 1000 XML files by calling+processing them 
with the document() function, you will see a large decrease in total 
running time.

Compiling the stylesheet and keeping the compiled stylesheet in a pool 
adds another performance gain when you need that stylesheet more than once.

Of course, these general performance improvements are applicable to just 
about any processor on any system. But the JVM is notorious for adding 
lots of extra overhead.

Cheers,
-- Abel Braaksma