Question

I’m running that method in quick succession as fast as I can, and the faster the better, so obviously if CGDataProviderCopyData() is actually copying the data byte-for-byte, then I think there must be a faster way to directly access that data…it’s just bytes in memory. Anyone know for sure if CGDataProviderCopyData() actually copies the data? Or does it just create a new pointer to the existing data?

Answer 1

The bytes are copied.

Internally a CFData is created (CFDataCreate) with the content of the data provider. The CFDataCreate function always make a copy.