It would be hard to beat Abigail-IIs implementation of comp for performance, and I don't need the full power of Levenshtien for this, but I''l be sure to grab the XS version next time I need it.
Thanks for the pointers.
Examine what is said, not who speaks.
"Efficiency is intelligent laziness." -David Dunham
"When I'm working on a problem, I never think about beauty. I think only how to solve the problem. But when I have finished, if the solution is not beautiful, I know it is wrong." -Richard Buckminster Fuller
If I understand your problem, I can solve it! Of course, the same can be said for you.