XOM API for Processing XML with Java

[Elliotte Harold <elharo AT metalab.unc.edu>]

Wolfgang Hoschek wrote:
> Here are some more Serializer performance patches against xom-1.1-CVS
>
> 1. improved UnicodeWriter.{writePCData, writeMarkup,  
> writeAttributeValue) for strings that contain both portions that need  
> - escaping and others that do not need escaping. Example: foo bar     
> hello                      world foo bar
> 2. replace BufferedWriter used by Serializer with an unsynchronized  
> custom version, enabling much better compiler inlining
> 3. revert Serializer.writeNamespaceDeclarations to previous impl (the  
> recently changed CVS impl shows a 25% degradation)
>
> Results: 1.5 - 2x faster for a wide range of documents
> All tests pass after applying the patches.

By any chance did you get any numbers on the effects of just replacing 
BufferedWriter with an unsynchronized version, independent of the other 
changes? I'm considering whether to mention this possibility in the next 
edition of Java I/O.

--
Elliotte Rusty Harold  elharo AT metalab.unc.edu
XML in a Nutshell 3rd Edition Just Published!
http://www.cafeconleche.org/books/xian3/
http://www.amazon.com/exec/obidos/ISBN=0596007647/cafeaulaitA/ref=nosim