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use std::mem;

/// Approximate allocated memory for hashbrown `RawTable`.
#[allow(dead_code)]
pub(crate) fn raw_table_alloc_size_for_len<T>(len: usize) -> usize {
    let buckets = if len == 0 {
        0
    } else if len < 4 {
        4
    } else {
        len.next_power_of_two()
    };
    let size_of_control_byte = 1;
    (mem::size_of::<T>() + size_of_control_byte) * buckets
}