additional io::copy specializations #113493
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- copying from `&[u8]` and `VecDeque<u8>` - copying to `Vec<u8>`
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…Simulacrum additional io::copy specializations - copying from `&[u8]` and `VecDeque<u8>` - copying to `Vec<u8>` A user on reddit [mentioned they saw a performance drop](https://www.reddit.com/r/rust/comments/14shv9f/comment/jr0bg6j/?context=3) when copying from a slice.
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…iaskrgr Rollup of 5 pull requests Successful merges: - rust-lang#111618 (Always name the return place.) - rust-lang#113247 (Add Tests for native wasm exceptions) - rust-lang#113273 (Use String or Int to set the opt level) - rust-lang#113469 (Remove `default_free_fn` feature) - rust-lang#113493 (additional io::copy specializations) r? `@ghost` `@rustbot` modify labels: rollup
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&[u8]andVecDeque<u8>Vec<u8>A user on reddit mentioned they saw a performance drop when copying from a slice.