Go 1.22 reduces heap allocations via smarter stack placement for slice buffers

The Go compiler now automatically allocates fixed-size slice buffers on the stack when their capacity is known at compile time, eliminating heap allocations entirely. A benchmark processing 10-element slices showed zero heap allocations compared to 4+ allocations in traditional append patterns. Stack allocation avoids garbage collector overhead and enables cache-friendly memory reuse while maintaining program correctness.