On 4 Dec 2012, at 17:49, Mike Abdullah <cocoa...@mikeabdullah.net> wrote:
> You have a performance problem. Thus you should use Instruments to see what
> is going on, rather than hope we can tell you from vague snippets of code.
Maybe I should use Instruments, problem is: I cannot.
I start Instruments, select some template (e.g. Leaks), attach to a
(user-)process, click "Record", and now a panel comes up (which I have never
seen before): "Instruments wants permission to analyse other processes. Type an
admin...".
Annoying, but maybe necessary.
But now nothing happens, i.e no recording takes place.
What magic do I have to perform to make Instruments (4.5) work?
(I asked this on the Xcode list already, but got no answer).
>
> On 4 Dec 2012, at 10:29, "Gerriet M. Denkmann" <gerr...@mdenkmann.de> wrote:
>
>> My app creates lots of MyOperations (subclass of NSOperation) and puts them
>> into an NSOperationQueue.
>>
>> I would expect that the app thus remains responsive, but sometimes it is not.
>>
>> A sure way to beach-ball my app is: start it with a few hundred operations
>> (which will take about 20 seconds to finish).
>> Make some other app active.
>> Try to make my app active again - it's panel stays grey and after a few
>> seconds the cursor will turn into a beach-ball.
>>
>> These MyOperations interact with their controller in two ways:
>>
>> 1. they do once at start: [ controller dataStringFor: row ];
>>
>> The controller has:
>>
>> - (NSString *) dataStringFor: (NSUInteger)row
>> {
>> @synchronized(self)
>> {
>> if ( self.stringArray == nil ) { create it - takes some time,
>> but happens only once};
>> }
>> return self.stringArray[row];
>> }
>>
>>
>> 2. When MyOperations have finished their work they call: [ controller done:
>> row result: someNumber ];
>>
>> The controller has:
>>
>> - (void) done: (NSUInteger) row result: (NSUInteger) someNumber
>> {
>> @synchronized(self)
>> {
>> [ self.rowsToDo removeIndex: row ]; //
>> NSMutableIndexSet
>> };
>>
>> // sometimes do some logging, update user interface - but only
>> every few seconds
>> }
>>
>> So, why the beach-ball? What am I doing wrong? How to debug this? Why does
>> the app-switch make the beach-ball appear?
>>
>> Gerriet.
>>
>> 10.8.2, Arc
>>
>>
>>
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