Add some speedups for long lines

Remove bidirectional support that I don't use.

emacs.org

@@ -273,6 +273,27 @@ computers.
 (set-default 'sentence-end-double-space nil)
 #+END_SRC
 
+*** long line speedups
+
+Improve the performance of emacs with files that contain long lines. Disable
+left to right and right to left in the same buffer support. Until or if I learn
+a language that needs this I can deal with it then.
+
+#+BEGIN_SRC emacs-lisp
+(setq-default bidi-paragraph-direction 'left-to-right)
+#+END_SRC
+
+Also disable this algorithm, which may unbalance ()'s in bidirectional language
+detection. But again as I don't use/speak/read them. Ok tradeoff.
+
+#+BEGIN_SRC emacs-lisp
+(if (version<= "27.1" emacs-version)
+    ((setq bidi-inhibit-bpa t)
+    (global-so-long-mode 1)))
+#+END_SRC
+
+Ref: https://200ok.ch/posts/2020-09-29_comprehensive_guide_on_handling_long_lines_in_emacs.html
+
 *** sentence end
 
 Semi related to the above, make the sentence endings a bit more code-ish.