1. Launch emacs with "emacs -Q"
2. Open a PDF that has pages you can scroll
3. Scroll around (should be responsive)
4. Turn on `M-x global-linum-mode`
5. Ensure the global-linum-mode is enabled and now scroll around (noticeable lag)
so when I comment out (global-linum-mode 1) in my init.el, the problem goes away.
@Damien Cassou
I think I narrowed it down:
1. Launch emacs with "emacs -Q"
2. Open a PDF that has pages you can scroll
3. Scroll around (should be responsive)
4. Turn on `M-x global-linum-mode`
5. Ensure the global-linum-mode is enabled and now scroll around (noticeable lag)
so when I comment out (global-linum-mode 1) in my init.el, the problem goes away.