Function apply_op_ree_segments 

fn apply_op_ree_segments<T: ArrayOrd>(
    l: T,
    l_info: &ReeInfo<'_>,
    r: T,
    r_info: &ReeInfo<'_>,
    neg: bool,
    op: fn(T::Item, T::Item) -> bool,
) -> BooleanBuffer

Compare two REE arrays by walking both run_ends simultaneously, comparing once per aligned segment and bulk-filling the result.