Application issues on OS X Lion

our application (C++ + OpenGL + GLUT)

runs OK on all Macs with 10.6.7 S开发者_如何学Gonow Leopard

but we are experiencing robust problems on the OS X Lion

• application launches extremly long
• application performance was dramaticly reduced
• application craches quite often

what can be the cause of this

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the problem was related to flaws in code... like there was an uninitialized bool variable which was initialized differently on Lion and differently on Snow Leopard