pub fn heapsort<T, F>(v: &mut [T], is_less: F)where
    F: FnMut(&T, &T) -> bool,
🔬This is a nightly-only experimental API. (sort_internals)
Available on non-crate feature miri-test-libstd only.
Expand description

Sorts v using heapsort, which guarantees O(n * log(n)) worst-case.