submitted 11 months ago* (last edited 11 months ago) by commander@lemmings.world to c/rust@lemmy.ml

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let mut variable: Type;
loop {
    variable = value;
}

loop {
    let variable: Type = value;
}

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[-] Giooschi@lemmy.world 3 points 11 months ago* (last edited 11 months ago)

let statements only reserves space on the stack

It is not guaranteed to do that. It could also use a register or be optimized out completly (like in the example you posted in the other comment).

The stack pointer is also not changed for each local variable, but instead for each function call, so it wouldn't make a difference anyway.

[-] anhkagi@jlai.lu 1 points 11 months ago

Ok! Thanks for the clarification !

this post was submitted on 08 Mar 2025

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