MR CoreData (on disk) queries MUCH slower in ios9

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MR CoreData (on disk) queries MUCH slower in ios9 #1178

Open z-br opened 8 years ago

z-br commented 8 years ago

We have an app that uses MR extensively. Everything was swimming along fine until our users started upgrading to ios9. Now basic queries take much much longer. Switching to memory store helps, but this isn't ideal. Has anyone else experienced this with the upgrade to 9? Do you have any tips? It seems to be the only thing that changed was the ios upgrade.

tonyarnold commented 8 years ago

Hi Greg — could you do some basic profiling using Instruments and see if you can see any patterns? It could be specific to your app, or something wider. Either way, I'll do my best to advise.

z-br commented 8 years ago

Thanks I'll post something when I get a chance. I profiled this issue before and saw a lot of CPU usage in MR but I'll update with specifics ASAP.