How do Rust collections perform in different scenarios?

What are the performance differences between Rust's Vec and HashMap?

Vec is optimized for sequential access and has low overhead, while HashMap provides fast key-value lookups but has higher memory usage.

In what scenarios should I prefer using a BTreeMap over a HashMap?

Use BTreeMap when you need ordered keys and range queries, as it maintains order and allows efficient traversal.

How does the performance of Rust collections compare to collections in other languages?

Rust collections are designed for performance and safety, often outperforming those in languages like Python or Java due to zero-cost abstractions.

Can you explain how memory allocation affects the performance of Rust collections?

Memory allocation can impact performance; collections like Vec allocate in chunks, reducing reallocations, while HashMap may need to resize, affecting speed.