Podcast #128: We chat with Kent C Dodds about why he loves React and discuss what life was like in the dark days before Git. Listen now.
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A LIFO (Last In, First Out) data structure.

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The red zone is, purely and simply, an optimization that can save instructions. It means that it's no longer necessary for the emitted code for every function to subtract from the stack pointer to … the red zone below the stack pointer without needing to save it and before calling other functions. This is a useful optimization to have available. If you no longer have to sub from the stack
answered Feb 24 '14 by Brian Onn