bump-scope 2.3.0

A fast bump allocator that supports allocation scopes / checkpoints. Aka an arena for values of arbitrary types.
Documentation 
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/// See [`std::hint::cold_path`].
#[cold]
#[inline(always)]
pub(crate) fn cold() {}

/// See [`std::hint::likely`].
#[inline(always)]
pub(crate) fn likely(condition: bool) -> bool {
    if condition {
        // ...
    } else {
        cold();
    }

    condition
}

/// See [`std::hint::unlikely`].
#[inline(always)]
pub(crate) fn unlikely(condition: bool) -> bool {
    if condition {
        cold();
    } else {
        // ...
    }

    condition
}