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objective-ccocoansprogressindicator

Smoothness of NSProgressIndicator: incrementBy vs setDoubleValue

I suspect that NSProgressIndicator runs smoother when its value is updated through incrementBy as compared to setDoubleValue.

Does anyone know if there's any real difference between the two methods of updating its value?

Solution

  • I don't have any knowledge of the internals, but I would be very surprised if incrementBy were not the equivalent of 

    [self setDoubleValue:[self doubleValue] + delta];

    Of course, since it has access to internal state, it could presumably skip all the method calls.But the act of actually rendering pixels to the screen almost certainly overpowers any minor performance difference between the two methods.