XML Performance
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XML Performance



XML performance processing

XML performance processing



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XML Performance XML Performance Presentation Transcript

  • Performance of XML-based format processing Performance Project Lead 02:00 PM – 02:45 PM 2009-11-05
  • Abstract
    • OOo has supported well in ODF and some filters and extensions was used to process OOXML in OOo. Both of them are ISO standards. And UOF is another XML-based document format standard in China. More and more document format standards are based on XML. OpenOffice.org was a suite that was supporting the most document format in all Office softwares. So to improve performance of XML-based format processing is a significant work of OOo.
    • This presentation will give out some ideas and test results from performance project in order to show how OOo process ODF and other XML-Based formats and how to get time from XML-Based formats processing.
  • Demand for Document
    • Larger and larger from time to time
    • More complex
    • More types of media, lots of object
  • Principle
    • Focus on particular format, not only to optimize XML format parsing
    • Focus on User Experience
      • How user behave?
      • How user Feeling?
  • Loading Phases
    • Filter detecting
    • Transforming in filter
      • Meta
      • Settings
      • Style
      • Content
    • External format need be transformed to native format such as OOXML and UOF
  • Chart of SW
  • Data Analysis Number of Paragraph 10 100 1000 2000 Loading Time 1.73s 4.63s 15.7 29
    • There are only numbers of paragraphs with one or two heading style in a document
    • For this sample the meta,setting, style spent same time.
    • It takes a lot of time that reading ,parsing and creating SwTxtNode and binding style one by one.
    • To start to loading context follow the meta, so we can know which styles and settings we need during we are processing the content.
    • To processing the parts for rendering
    • To read style,floating object,linking-object and setting, with multi-thread.
    • Parallel processing in order to unlock UI because OOo was a single process program, loading and saving block all operation now.
    Ideas for loading
  • Changed parts saving
    • Auto-saving
    • Saving document
    • Used methods like redlines or versionning
    • To save changed parts in block status, return to user interface, and then complete whole serializing in a another thread
    • To create index to position the changed node with mapping layer
    • Preprocessing media object
    • http://performance.openoffice.org
  • Questions?
  • Thanks