On Windows Mobile 6.5 (CE) Kontact Touch has a resource problem, the searching and indexing is done via strigifeeder and strigidaemon.
Options as tokoe saw them 2011020914:32:
1) A UI option to switch strigi_feeder between online/offline mode
pro: The strigi_feeder in offline mode wouldn't index anything until it is switched back to online mode. So it would take away pressure on the device during initial sync, since CPU and I/O usage is reduced.
contra: Since recent data are not indexed with strigi_feeder in offline mode, some internal searches might not return the correct, or better said 'expected', data. Switching the strigi_feeder to online mode automatically when a search is started is not really an option, because feeding the new data to strigidaemon takes a while, so they won't be included in the current search results.
costs: We have to extend strigi_feeder to correctly record actions during offline mode and replay them when switched to online mode. Furthermore we need options in the UI to switch the mode of the strigifeeder (Ideas from Björn Balazs?).
2) IDLE detection in strigidaemon with automatic shutdown
pro: Afaik strigidaemon uses lots of memory when running, so stopping strigidaemon whenever no indexing or search is done, should provide some free memory on the device.
contra: Searches are done quite often (e.g. the autocompletion in mail composer) and strigi_feeder will index data as soon as something changes (e.g. read flags in emails), so I doubt that strigidaemon will have long idle sessions. Strigidaemon might cause additional costs during its startup/shutdown phase.
costs: We have to implement an idle detection in strigidaemon (non qt-based!) and a clean shutdown procedure. Furthermore we have to extend akonadiserver to handle the disappearance of strigi dbus interface gracefully and restart the strigidaemon on demand. This needs a lot of testing!
It would be possible to combine 1) and 2), but this will increase the number of side effects, so much more testing is needed.