Comment by hexomancer

If you want to try it out on a PDF, I have implemented this in sioyek PDF reader:

https://github.com/ahrm/sioyek

You need to enable experimental features in `prefs_user.config` by adding `enable_experimental_features 1` and then enable this mode using `toggle_fastread` command within sioyek.

I also experimented with more sophisticated algorithms, you can read about the experiment here:

https://ahrm.github.io/jekyll/update/2022/04/14/using-langug...