this post was submitted on 08 Mar 2025
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Rust Programming

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Which is faster? (lemmings.world)
submitted 2 years ago* (last edited 2 years ago) by commander@lemmings.world to c/rust@lemmy.ml
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let mut variable: Type;
loop {
    variable = value;
}

or

loop {
    let variable: Type = value;
}
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[–] TehPers@beehaw.org 2 points 2 years ago

Without context, there's no reason to compare the performance of these. The compiler is complex enough that what you do in the loop and after the loop matters with regards to optimizations.

Do you have more context? What's actually happening in the code?