How do you improve the performance/memory footprint of your Rust program, without relying on any external crates, profilers, or architectural changes? Assume that logging and monitoring libraries etc. are all running on a separate process and do not consume resources.

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To improve performance/memory footprint of Rust program without external tools, focus on optimizing algorithms, data structures, and memory management.

Optimize algorithms to reduce time complexity
Use efficient data structures like HashMaps or Vecs
Minimize memory allocations by reusing objects or using stack allocation
Avoid unnecessary copying of data
Implement lazy evaluation to defer computations until needed

How do you improve the performance/memory footprint of your Rust program, without relying on any external crates, profilers, or architectural changes? Assume that logging and monitoring libraries etc. are all running on a separate process and do not consume resources.

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