By default they'll be using different 3D libraries - QuickDraw3D (runs on top of RAVE) vs. Quesa (which uses OpenGL). Also keep in mind that RB's Carbon event loop behaves different than the Classic loop - timers/threads may not update the same way (IIRC, RB5 had some serious issues with a laggy Carbon event loop).

Frank.
<http://developer.chaoticbox.com/>

On 1-Feb-07, at 2:05 PM, Eric Richards wrote:

Hi -

Why does a carbon app that uses Rb3D compiled on Rb tripple 5
run slower on os 9 than a classic build of the same app ?

Thanks

Eric



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