[Verse 1] In embedded systems where resources are tight Memory layout matters, we must get it right Four segments divide our precious RAM space Text code and data each find their place Static lives forever, globals take their stand While heap grows upward on programmer's command But stack moves downward, frame by frame it goes The gap between them shrinks as program flows [Chorus] Stack is fast, heap is vast Stack's automatic, heap will last LIFO order, stack's the way Malloc heap for longer stay Remember well this memory dance Stack for speed, heap for expanse [Verse 2] Function calls push frames upon the stack Parameters and locals, then they travel back When function returns, the frame disappears Automatic cleanup, no memory fears But heap allocation needs your careful hand Call malloc to reserve your piece of land Remember every byte you claim today Free it up or memory leaks will stay [Chorus] Stack is fast, heap is vast Stack's automatic, heap will last LIFO order, stack's the way Malloc heap for longer stay Remember well this memory dance Stack for speed, heap for expanse [Bridge] Stack overflow when recursion runs too deep Heap fragmentation makes your allocator weep Choose your weapon based upon your need Stack for structure, heap when data's freed Stack size is limited, set at program start Heap can grow larger, playing the long part Embedded systems need this balance true Memory-mapped registers depend on you [Verse 3] Real-time systems cannot wait around Heap allocation's timing can't be bound But stack operations happen in fixed time Deterministic behavior, performance sublime Know your memory map from low to high Text then data, then heap reaching for the sky Stack starts high and grows toward the ground In this architecture, efficiency is found [Chorus] Stack is fast, heap is vast Stack's automatic, heap will last LIFO order, stack's the way Malloc heap for longer stay Remember well this memory dance Stack for speed, heap for expanse [Outro] Memory mastery sets the expert apart Stack versus heap, now you know each part In systems engineering, this knowledge reigns Efficient allocation, maximum gains
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