Re: [iPhone] Why so many calls?
Re: [iPhone] Why so many calls?
- Subject: Re: [iPhone] Why so many calls?
- From: Corbin Dunn <email@hidden>
- Date: Wed, 28 Oct 2009 09:01:45 -0700
On Oct 27, 2009, at 5:22 PM, Phil Curry wrote:
>>> But can anyone explain all the other duplicate calls?
>>
>> Why does it matter? If you have eight or nine sections it makes
>> perfect sense. Or you could have one section and it needs to draw
>> multiple times, and whoever designed the API didn't want to go through
>> the expense of a KVO observation, instead asking the delegate for the
>> header/footer each time it needed it.
>>
>> But none of that matters.
> Kyle-
>
> But, as I thought I explained in the original post, the table only has 2 sections, 1 with 2 rows and 1 with 1 row.
> The table is only being loaded once. So why does it take:
>
> 9 tableView:titleForHeaderInSection: calls for 2 sections
> 8 tableView:titleForFooterInSection: calls for 2 sections
> 2 numberOfSectionsInTableView: calls for a single load
>
> In a table of this size, you're right - "Why does it matter".
> But what if my real table has 99 sections? Why should I get bogged down with 800-900 calls for section header titles and section footer titles.
> Seems like an incredible waste of effort. Just curious if anyone knows why this happens. If you don't know why, just say so.
You should log a bug for this, especially if it is a performance concern.
However, the iPhone has a lot of performance tuning done to it. This area was obviously not a hot spot.
corbin
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