In a file with long lines (~1000 characters/line), wucuo takes very long time. Maybe wucuo can check the size of the region before checking, or try to only check the actual visible portion of the buffer (then you need to handle truncated lines and wrapped lines, hscroll, etc).
Example file: https://gist.github.com/casouri/8ec9f36b270ba641155487a2774e05a3
In a file with long lines (~1000 characters/line), wucuo takes very long time. Maybe wucuo can check the size of the region before checking, or try to only check the actual visible portion of the buffer (then you need to handle truncated lines and wrapped lines, hscroll, etc).
Example file: https://gist.github.com/casouri/8ec9f36b270ba641155487a2774e05a3