Forget Borrow Checkers: C3 Solved Memory Lifetimes with Scopes

10 months ago

Modern languages offer dynamic memory management techniques with tradeoffs in performance, control, and complexity.
The C3 Temp allocator is a region-based memory management solution combining ease of use with performance.
Memory allocations are categorized into stack (efficient, automatic) and heap (customizable, larger) allocations.
Memory leaks occur when dynamically allocated memory isn't freed, leading to wasted resources.
Common solutions include RAII, reference counting, and garbage collection, each with different tradeoffs.
Memory regions (arenas, pools) allow efficient management and bulk freeing of memory allocations.
Memory regions improve locality and CPU efficiency compared to traditional malloc.
The C3 Temp allocator automatically resets memory when leaving scope, preventing leaks.
The Temp allocator is built into C3's standard library as @pool().
Valgrind can verify automatic memory management by the Temp allocator.
Nested @pool scopes allow explicit control over memory cleanup timing.
The compiler automatically adds @pool() to main() if temp allocation functions are used without an enclosing scope.
The Temp allocator provides scoped memory lifetimes, ease of use, and performance without garbage collection overhead.

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