neo_frizbee 0.8.0

Fast fuzzy matching via SIMD smith waterman, similar algorithm to FZF/FZY
Documentation 
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#[inline(always)]
pub fn match_haystack(needle: &[u8], haystack: &[u8]) -> bool {
    let mut haystack_idx = 0;
    for needle in needle.iter() {
        loop {
            if haystack_idx == haystack.len() {
                return false;
            }

            if needle == &haystack[haystack_idx] {
                haystack_idx += 1;
                break;
            }
            haystack_idx += 1;
        }
    }

    true
}

#[inline(always)]
pub fn match_haystack_insensitive(needle: &[(u8, u8)], haystack: &[u8]) -> bool {
    let mut haystack_idx = 0;
    for needle in needle.iter() {
        loop {
            if haystack_idx == haystack.len() {
                return false;
            }

            if needle.0 == haystack[haystack_idx] || needle.1 == haystack[haystack_idx] {
                haystack_idx += 1;
                break;
            }
            haystack_idx += 1;
        }
    }

    true
}

#[inline(always)]
pub fn match_haystack_typos(needle: &[u8], haystack: &[u8], max_typos: u16) -> bool {
    let mut haystack_idx = 0;
    let mut typos = 0;
    for needle in needle.iter() {
        loop {
            if haystack_idx == haystack.len() {
                typos += 1;
                if typos > max_typos as usize {
                    return false;
                }

                haystack_idx = 0;
                break;
            }

            if needle == &haystack[haystack_idx] {
                haystack_idx += 1;
                break;
            }
            haystack_idx += 1;
        }
    }

    true
}

#[inline(always)]
pub fn match_haystack_typos_insensitive(
    needle: &[(u8, u8)],
    haystack: &[u8],
    max_typos: u16,
) -> bool {
    let mut haystack_idx = 0;
    let mut typos = 0;
    for needle in needle.iter() {
        loop {
            if haystack_idx == haystack.len() {
                typos += 1;
                if typos > max_typos as usize {
                    return false;
                }

                haystack_idx = 0;
                break;
            }

            if needle.0 == haystack[haystack_idx] || needle.1 == haystack[haystack_idx] {
                haystack_idx += 1;
                break;
            }
            haystack_idx += 1;
        }
    }

    true
}