Re: Send msg to object by nameed NSString;
Re: Send msg to object by nameed NSString;
- Subject: Re: Send msg to object by nameed NSString;
- From: Trygve Inda <email@hidden>
- Date: Thu, 19 Jun 2014 06:31:19 -0700
- Thread-topic: Send msg to object by nameed NSString;
>
> On 19 Jun 2014, at 3:30 pm, Trygve Inda <email@hidden> wrote:
>
>> Should I be doing:
>>
>> self.myProperty = [coder decodeObjectForKey:kMyProperty];
>>
>> (isn't that effectively the same as a getter/setter)?
>
> Yep, it's the same, so you will gain nothing there.
>
>
>> Guessing it would be better as:
>>
>> myProperty = [[coder decodeObjectForKey:kMyProperty] retain];
>
>
> Yes, this is what I meant. If you have declared your own ivars, it's far
> faster to set them directly.
>
>>
>> 100x - 600x is a big hit.
>
> It only starts to become noticeable when you are dearchiving a big graph
> though, so don't sweat it for one object. If you are relying on synthesizing
> the actual ivar, not just the setters/getters, you have little choice, though
> apparently you can rely on the ivar being the name of the property with a
> leading underscore. I dislike that sort of hidden magic however.
>
> I saw one file come down from taking 11 minutes (!) to 1.5 seconds to open
> with just this change.
>
>
> --Graham
>
>
>
I declare all my ivars but this case is small so I can't imagine an
improvement. I have one other place where it might help though. That one
takes about 2-3 seconds to open/read a file.
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