I have no expert weigh-in but only a quick google search revealed: From: http://www.cocoadev.com/index.pl?GarbageCollection
> The big cost is to latency - the ability of a program to respond > near-instantaneously to real-time situations. For many programs, this is not > an issue - nanosecond latency is simply not needed. Other problem domains > cannot use mark-and-sweep for this reason, for example music (eg MIDI) > programs. Low latency is impossible because during the mark-and-sweep > process, the program cannot respond to external stimulus, so latency cannot > be lower than the length of a mark-and-sweep. Maybe someone is kind enough to correct me. Regards, - Rob On 2011-07-27, at 7:54 PM, Tom Jordan wrote: > Hi, > > I'd like to use MacRuby alongside Objective-C in a MIDI app I'm writing. > I have already had success with evaluating MacRuby files from the AppDelegate > and they work great in tandem with the rest of the code in Objective-C. I'm > just concerned about getting further along with application, and all of a > sudden finding out that there are MIDI timing issues that are being adversely > affected by the garbage collection. Right now the MIDI output that the app > is generating sounds tight, although the app is simple at this point, and I'm > worried that as more objects get allocated, etc.. there may be some timing > issues. If that does happen, will there be a way to fix that using > NSThreads? Or would I need to use pthreads and register them with > "objc_registerThreadWithCollector()" ? The reason I'm asking, is that I've > tried to use an open-source MIDI framework that uses pthreads, and it will > only work if GC is turned off. I've tried to call > "objc_registerThreadWithCollector()" from that code, but it's still not > working. At this point, I don't need to use the open source MIDI framework > since I have MIDI working anyways.. but I'm concerned about timing issues > creeping in later.. > > any advice is welcome... If someone says "Your crazy for trying to write a > MIDI application using Garbage Collection", or "Don't worry, Garbage > Collection won't be a problem"... that will help immensely.. or something in > between if that's the case.. any more knowledge on this subject will be > greatly appreciated.. Thanks ! > > Cheers, > > Tom Jordan > _______________________________________________ > MacRuby-devel mailing list > MacRuby-devel@lists.macosforge.org > http://lists.macosforge.org/mailman/listinfo.cgi/macruby-devel
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