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** Branch linked: lp:~zeitgeist/zeitgeist/bug695311

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https://bugs.launchpad.net/bugs/695311

Title:
  DataSourceRegistry is a huge performance bottleneck

Status in Zeitgeist Framework:
  In Progress

Bug description:
  I was wondering today why the timings for inserting events when running our testsuite (or my benchmark scripts) are looking much better than the timings in a 'real' daemon instance.

Some Data:
  * inserting 500 events at once in my benchmarks: ~0.09 sec
  * inserting the same 500 events at once in a 'real' zeitgeist session: ~0.185 sec

You can reproduce this tests by running the attached script like

ZEITGEIST_DEFAULT_EXTENSIONS="_zeitgeist.engine.extensions.datasource_registry.DataSourceRegistry" PYTHONPATH=. python /tmp/test_insert_events.py

PYTHONPATH=. python /tmp/test_insert_events.py

and compare outputs.

To simulate the scenario of multiple running instances of the same application, uncomment the lines 26+ in the script, you will get even worse results.