Public bug reported: In the prefix search we are using a 'GLOB' sql-statement, this statement is not using the index and thus slow, some timings from me running the attached script:
* Database with ~50k events * ~1% of these event have a subject with uri beginning with 'http://aa' * searching for all uris beginning with 'http://aa' using the 'GLOB' expression (what we have now in lp:zeitgeist) takes ~0.03 sec * changing this query to some (x >= S AND x < T) statement reduces this time to ~0.002 sec This is easy to implement (and test) for ascii chars, but as we support unicode esp. testing seems to be a bit tricky ** Affects: zeitgeist Importance: Undecided Assignee: Markus Korn (thekorn) Status: In Progress -- Prefix search is not using an index https://bugs.launchpad.net/bugs/641198 You received this bug notification because you are a member of Zeitgeist Framework Team, which is subscribed to Zeitgeist Framework. Status in Zeitgeist Framework: In Progress Bug description: In the prefix search we are using a 'GLOB' sql-statement, this statement is not using the index and thus slow, some timings from me running the attached script: * Database with ~50k events * ~1% of these event have a subject with uri beginning with 'http://aa' * searching for all uris beginning with 'http://aa' using the 'GLOB' expression (what we have now in lp:zeitgeist) takes ~0.03 sec * changing this query to some (x >= S AND x < T) statement reduces this time to ~0.002 sec This is easy to implement (and test) for ascii chars, but as we support unicode esp. testing seems to be a bit tricky _______________________________________________ Mailing list: https://launchpad.net/~zeitgeist Post to : zeitgeist@lists.launchpad.net Unsubscribe : https://launchpad.net/~zeitgeist More help : https://help.launchpad.net/ListHelp
