Performance

Known areas for improvement

system issues

• Linux / Linking - relocation processing is very slow ( ogg video, odp slides ) two 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.
• Linux / I/O scheduling & pre-loading is poor

General I/O & memory issues

• Config mgr - scattered files
• UI configuration - tons of scattered files
• .rdb files - loads of empty space, mmap + random access pattern

Helpful tooling

• Linux/cold-start simulator
• relocstat - dump relocation data
• RTL_LOGFILE - export RTL_LOGFILE=/tmp/foo
• valgrind - debug / trace memory usage
• speedprof - a quick / hackish sampling full-stack-trace profiler & visualisation tool
• APPR - a performance regression tool suite

Approaches being worked on

• Config refactor - reduce seeks/files, better caching
• Disk Access
• -Bdirect linking
• FIXME - Malte - we should really have your list embedded here ...

Other Pages

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

• OpenOffice.org Performance Tuning page
• Writer (SW, XML, Math, Linguistic) specific Optimizations
• Current & Planned Performance Activities