Performance

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Revision as of 16:59, 4 February 2009 by Mt (Talk | contribs)

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This wiki page is the collaboration entry point for the OOo Performance project.

For questions and discussions, please use the new mailing list from the performance project: dev@performance.openoffice.org

The project was started in January 2009, but a lot of information here (especially on the linked wiki pages) was created a long time ago and some of it might be outdated.

This page will be cleaned up soon.


Project Summary

Project will achieve the goal: maintain good performance and evaluate OOo.

OOo Issues

Issues from End-User

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Known areas for improvement

Configmgr[new]

Component issues

system issues

  • Linux / Linking - relocation processing is very slow ( ogg video, odp slides ) several possible ways to fix that
    • re-ordering symbol & elf hash tables to improve cache locality, lots of good & simple ideas here.
    • -Bdirect implementation [1] - gaining little traction.
    • exporting Vague linkage more cleverly & using RTLD_LOCAL where possible
    • basic linker optimizations:
      • don't export *UND* in .hash table
      • sort syms & dynsym entries more intelligently
      • .hashvals optimisation
  • Linux / I/O scheduling & pre-loading is poor

General I/O & memory issues

  • Image strip layout - our images strips are huge & unwieldy, layed out horizontally and are 'cached' in scattered files - this is fixed in CWS ka009, which never seems to get integrated.
  • Configuration information scattered across many files
  • UI configuration - tons of scattered files
  • .rdb files - loads of empty space, mmap + random access pattern

User Experience Index (UEI)

UEI and Case Documents

Helpful Tooling and Resources

Test Environment

Popular reference configuration(use similar env on Hamburg and Beijing)

CPU:    Core2 Duo 1.5~2G
Memory: 512M
OS:     WindowsXP HOME

Test & Tuning Tools

Benchmarks & Description

If you have some benchmarks, share them here!

Performance Test Results Distribution

Test results for Different Versions

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Contrastive Data & Analysis

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Work List and Progress

  • Configmgr re-factor, reduces locking overhead & memory usage cf. CWS configrefactor01
  • XML Load
  • Config refactor - reduce seeks/files, better caching
  • Disk Access
  • -Bdirect linking
  • FIXME - Malte - we should really have your list embedded here ...

Integrated improvements

Other Pages

This Wiki page should become the ultimate authority on performance issues. Meanwhile, here are links to performance informationat other places

Personal tools