Re: Lost memory, GCD, dispatch sources, ?Cocoa bindings & User interface
Re: Lost memory, GCD, dispatch sources, ?Cocoa bindings & User interface
- Subject: Re: Lost memory, GCD, dispatch sources, ?Cocoa bindings & User interface
- From: Jean Suisse <email@hidden>
- Date: Thu, 17 Sep 2015 16:46:29 +0200
OK, I understand. That was an exemple. The 100+ variables are spread on four Instruments. So I call 4 updateUI functions sequentially. There is no difference with having everything in a single function.
Since I chose to use bindings directly on the instruments properties for this project (not very elegant), I have indeed a strong coupling between the view and the instruments. Initially, the UI was designed for the instruments (the model isn’t flexible and the App will run for two years before being thrown away…). So I tied the UI directly to the instrument’s properties. That was a little to fast to be good and updates did occur from background threads. Having intermediary variables and updating the UI in one shot from the main thread every second was the quickest option to get everything up and running again… but then the app started eating memory like crazy.
I could spend time decoupling the view from the instruments, but at some point I would still have to update the UI and I get back the memory issues.
These, which were qualified by others as “long standing bug in appkit” are now solved by the hack described before.
I am still interested in understanding what happens with CA Layers in the kernel.
> On 17 sept. 2015, at 16:34, Gary L. Wade <email@hidden> wrote:
>
> Yes, I saw that code, but it only set a single variable and appeared to only be associated with a single instrument. If you have 100+ instruments, that would be 100+ separate updates. You know your code better than I and may be simplifying things for us, but I've seen cases sounding very much like yours where bindings is not the right solution. From how I read this, you are tightly coupling your view to your model. Consider decoupling your view-updating code like I suggested and you should see a significant change without a hack.
> --
> Gary L. Wade (Sent from my iPad)
> http://www.garywade.com/
>
>> On Sep 17, 2015, at 7:00 AM, Jean Suisse <email@hidden> wrote:
>>
>> Thanks. But I already have one single timer dispatch source that updates all the UI only by transferring double / int values from instance variables to bound properties. The timer fires every second and causes the whole 100+ fields to be updated. This, however, does not prevent KVO to operate for each setter being called.
>> More information in my first post where you can see the implementation of the timer dispatch source and of the updateUI functions and in a previous e-mail I sent today. Data format varies based on the data being displayed (I use the formatters to display the correct physical unit for each measurement).
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| References: | |
| | >Lost memory, GCD, dispatch sources, Cocoa bindings & User interface (From: Jean Suisse <email@hidden>) |
| | >Re: Lost memory, GCD, dispatch sources, Cocoa bindings & User interface (From: Quincey Morris <email@hidden>) |
| | >Re: Lost memory, GCD, dispatch sources, Cocoa bindings & User interface (From: Charles Srstka <email@hidden>) |
| | >Re: Lost memory, GCD, dispatch sources, Cocoa bindings & User interface (From: Ken Thomases <email@hidden>) |
| | >Re: Lost memory, GCD, dispatch sources, ?Cocoa bindings & User interface (From: Quincey Morris <email@hidden>) |
| | >Re: Lost memory, GCD, dispatch sources, ?Cocoa bindings & User interface (From: Jean Suisse <email@hidden>) |
| | >Re: Lost memory, GCD, dispatch sources, ?Cocoa bindings & User interface (From: Quincey Morris <email@hidden>) |
| | >Re: Lost memory, GCD, dispatch sources, ?Cocoa bindings & User interface (From: Jean Suisse <email@hidden>) |
| | >Re: Lost memory, GCD, dispatch sources, ?Cocoa bindings & User interface (From: "Gary L. Wade" <email@hidden>) |
| | >Re: Lost memory, GCD, dispatch sources, ?Cocoa bindings & User interface (From: "Gary L. Wade" <email@hidden>) |
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