I had to disable it. Not using Chrome but it would freeze Firefox. I assume it will be in the update which seem to be coming out about every week now.
Not that this helps but I am having the exact same problem. I use the scroll wheel on my mouse and it freezes for about 20 seconds. I think it has something to do with the new line numbering. There may be a way to deactivate it but I just started looking. Will post if I find something.
