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Leopard performance penalty (3x slower), NSPopAutoreleasePool
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Leopard performance penalty (3x slower), NSPopAutoreleasePool


  • Subject: Leopard performance penalty (3x slower), NSPopAutoreleasePool
  • From: Gerd Knops <email@hidden>
  • Date: Sat, 17 Nov 2007 12:53:57 -0600

I have a complex Cocoa application, 10.4 SDK (no GC etc). Loading a document (and performing a large number of calculations triggered by that) takes 4 seconds under Tiger.

Under Leopard, loading the same document takes 8 seconds until it displays, after which the application is unresponsive for another 4 seconds, the entire time being spent in NSPopAutoreleasePool.

I presume that performance penalty is largely due to Leopards more complex memory handling. Has anybody else observed this, and knows of any strategies to minimize that overhead?

Thanks

Gerd

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