On 25.09.2008, at 01:18, Dan Birns wrote:
So what happened when I used [NSTimer scheduledTimerWithTimeInterval... I was getting another timer. The result was that my selector would get called maybe 10X more often than intended. This didn't break anything, but impaired performance. So now I simply add a call to [timer invalidate]; before adding a new timer. It's true that we're allocating a new timer with every call, and I'd prefer not to do that, but this seems to be working okay for now.
That can't really have happened unless you set the 'repeats' flag on that timer, too.
Timers are a special case because they get retained both by the current run loop when they're attached to it, and by you. Hence the 'invalidate' call, which removes it from the run loop again.
I must say, after 20 years of C malloc(), I find retain/release mysterious. It's probably no better or worse than malloc/free, but confusing to me. It seems to me that it has exactly the same advantages/disadvantages, but it's just wildly different. Who does the free()? Who does the retain/release? Pretty much the same problem...
The main idea behind retain/release is to make shared ownership over a given block of memory and passing memory between scopes easier. This isn't supposed to be saving you from having to do memory management manually. If you want less manual management, turn on the garbage collector.
This might be a good opportunity for me to mention Episode 10 of Late Night Cocoa:
<http://www.mac-developer-network.com/podcasts/latenightcocoa/episode10/index.html >
where you can hear me going on and on about memory management and the purpose and ideas behind retain/release.
Cheers, -- Uli Kusterer "The Witnesses of TeachText are everywhere..." http://www.zathras.de _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
