Hi Marc, I have pushed to my hslogger repo the optional priority for a logger support that we talked about, which is the Haskell version of Python's NOTSET. It is currently untested and represents only a minor API change. Please take a look and let me know your thoughts. It adds one new function to the API (clearLevel) and changes the return type of getLevel. Other than that, the changes are pretty much hidden from the public interface. I looked at your git repo, but I'm not going to pull anything from it right this minute. I would consider your performance change, but it was wrapped up with half a dozen other things in a single commit so I couldn't extract just it. If you would split up your changes into small bite-sized diffs, where each one makes exactly one change and is documented, I would be happy to take another look. As it is, each patch is touching too many unrelated areas for me to really bring them in. (I don't want API changes just for a performance improvement.) hslogger is used by a bunch of code all over the place, so I want to be very careful about what I do to it to avoid causing a lot of hassle for a lot of people. -- John