ios - Why is block designed to be allocated on the stack unless copied? -


why has apple designed block allocated on stack unless copied? what's benefit such behavior? why not make behave regular nsobject - alloc-init , goes on heap automatically?

the reason why blocks placed on stack default speed. in common case lifetime of block less of stack function contains it, optimisation.

http://www.cocoawithlove.com/2009/10/how-blocks-are-implemented-and.html


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