Whitespace skipper approach one

skip.rs

        #[inline(force)]
        let cur = |data: &[u8], pos| -> usize {
            unsafe { *data.get_unchecked(pos) as usize }
        };

        #[inline(force)]
        let skip_whitespace = |data, pos| -> usize {
            let mut ws = 0;
            'outer: while PARSE_FLAGS[cur(data, pos + ws)] & PARSE_FLAG_WS != 0 {
                'skip_ws: loop {
                    if flags(cur(data, pos + ws + 1)) & PARSE_FLAG_WS == 0 { ws = ws + 1; break 'skip_ws; }
                    if flags(cur(data, pos + ws + 2)) & PARSE_FLAG_WS == 0 { ws = ws + 2; break 'skip_ws; }
                    if flags(cur(data, pos + ws + 3)) & PARSE_FLAG_WS == 0 { ws = ws + 3; break 'skip_ws; }
                    ws = ws + 4;
                    if flags(cur(data, pos + ws)) & PARSE_FLAG_WS == 0 { break 'skip_ws; }
                }

                if cur(data, pos + ws) != '#' as usize {
                    break 'outer;
                }

                ws = ws + 1;

                'skip_comment: loop {
                    let c = cur(data, pos + ws);
                    if c == 0 || c == '\n' as usize || c == '\r' as usize { break 'skip_comment; }
                    ws = ws + 1;
                }
            }

            pos + ws
        };