Function count_chars

crates/wtf8/src/core_str_count.rs:10–20

(s: &Wtf8)

#[inline]
pub(super) fn count_chars(s: &Wtf8) -> usize {
    if s.len() < USIZE_SIZE * UNROLL_INNER {
        // Avoid entering the optimized implementation for strings where the
        // difference is not likely to matter, or where it might even be slower.
        // That said, a ton of thought was not spent on the particular threshold
        // here, beyond "this value seems to make sense".
        char_count_general_case(s.as_bytes())
    } else {
        do_count_chars(s)
    }
}

fn do_count_chars(s: &Wtf8) -> usize {
    // For correctness, `CHUNK_SIZE` must be: