[trishume]

That's not a perfectly fair comparison. Vim's syntaxes are often super simple and do a much less nice job at highlighting than most tmLanguage syntaxes.

Also all that video tests for is the presence of an optimization where it updates the on-screen colours as soon as that part of the file is done instead of after the entire file is done. It tells nothing about the underlying speed of the highlighting engines. Perhaps an important optimization, but not much information here.