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...