@vsajip, what are your thoughts about this?

I'm not sure why @Jason-Y-Z closed this - maybe due to impatience due to my lack of response. I've not had much time to look at this, but I was thinking about trying a different approach - caching the formatted value in an instance variable to avoid reformatting. Since everything happens inside emit(), in theory one could avoid coupling by replacing the FileHandler.emit(...) call with just the stream.write(...) and self.flush() that StreamHandler.emit() does (since self.stream won't be None at that point, FileHandler.emit() is essentially the same as StreamHandler.emit(...) - it's just two lines of code duplication, and so doesn't seem unreasonable to do to avoid coupling. Thoughts?