Comment 4 for bug 1958539

We have done some performance testing between bleach and lxml, it is worth noting that bleach is significantly slower than lxml in our experience increasing page load time by 300-400 milliseconds. See https://github.com/jupyter/nbconvert/issues/1892?notification_referrer_id=NT_kwDOAARsWrE0NzAwNjE2MjEwOjI4OTg4Mg&notifications_query=repo%3Ajupyter%2Fnbconvert#issuecomment-1294475221