Hi, you can read its code in google\appengine\ext\db\__init__.py, about line 1850.
Filter() will do some check, then use datastore._AddOrAppend(dictionary, key, value) to add a filter. The dictionary object is a hashmap, so it won't take more datastore time, only the checking time are wasted. 2009/11/1 MajorProgamming <[email protected]>: > > If I'm filtering on a Listproperty, and perform the same filter twice, > is there a performance hit? > > q=q.filter('lp =','value1') > q=q.filter('lp =','value1') > > Thanks, > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en -~----------~----~----~----~------~----~------~--~---
