needless-borrow-of-copy

Prefer passing small Copy scalars by value

A readonly borrow of a machine scalar adds indirection to a value that Copy can pass directly.
Instead, you SHOULD pass the scalar by value and rely on its intrinsic Copy behavior.

- Category: performance
- Level: warning
- Fix: suggestion
- Scope: module

Reported

function increment(value: &readonly int32): int32 {
    return value + 1;
}
Accepted

function increment(value: int32): int32 {
    return value + 1;
}
Prior art

- Clippy · triviallycopypassbyref

language/linter/src/rules/performance/needlessborrowofcopy.rs:8