Re: iOS watchdog timeout at startup vs later?
Re: iOS watchdog timeout at startup vs later?
- Subject: Re: iOS watchdog timeout at startup vs later?
- From: Rick Mann <email@hidden>
- Date: Tue, 12 Aug 2014 16:31:17 -0700
In most cases, migration is very fast, and therefore not a problem. I'm trying to gauge how big a data set I can migrate before it becomes a problem. So, an answer to my actual question would be helpful. I don't care that it may change in the future, I'd like to know what it is now.
On Aug 12, 2014, at 16:27 , Kyle Sluder <email@hidden> wrote:
> On Tue, Aug 12, 2014, at 06:24 PM, Rick Mann wrote:
>>
>> On Aug 12, 2014, at 15:12 , Kyle Sluder <email@hidden> wrote:
>>
>>> On Tue, Aug 12, 2014, at 04:00 PM, Rick Mann wrote:
>>>> Hi. Is the timeout (the one that kills your app if the main run loop
>>>> blocks for too long) longer during app startup than after it's running?
>>>> I'm concerned about the Core Data migration my app does at startup. I
>>>> will eventually move it to work on a background thread, but I'd like to
>>>> punt that to the next release in the interests of time.
>>>
>>> Don't punt it. Do it now.
>>>
>>> Paul Goracke gave a very nice description of the death spiral that
>>> ensues if you try to perform a main-thread migration, especially at app
>>> launch: http://vimeo.com/89370886
>>
>> Unless we can show that it Just Doesn't Work (which it does), I seriously
>> can't spend the time to do that right now.
>
> Well in that case, be prepared for rejection from the App Store, or
> one-star reviews from your customers, when the watchdog repeatedly kills
> your app during launch.
>
> Obviously I don't know your app's architecture, but conceptually, even
> if you're using the thread-confinement model, you just need to throw up
> some form of modal UI while you perform the migration on a background
> thread.
>
> --Kyle Sluder
--
Rick Mann
email@hidden
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