How can I prevent Ctrl+n to write into buffer?

Question

I am using my-run-latex () function (explained here: How can I run additonal linux commands after compiling a latex file) after each save, which I do very often.

I bound it to: (add-hook 'LaTeX-mode-hook (λ () (local-set-key (kbd "C-x C-s") 'my-run-latex))).

I observe than after enter C-x C-s, remove my finger from s, continue to press Ctrl and switch into press n (final comman will be C-n), once in a while instead of moving line below it shows nnnnnn in the buffer.

What could be the main reason for this? Does pdf compilation at the background cause this? Is there any way to prevent this behavior?

Answer 1

From the @lawlist's comment I believe I find a lead to cause of the problem I was having.

Link: https://stackoverflow.com/q/51907085/2402577

Garbage collection is generally a necessary evil, and can cause a noticeable pause; e.g., when holding down the arrow-key and moving left/right rapidly.

---

I had following lines in my config:

(add-hook 'after-init-hook
          `(lambda ()
             (setq gc-cons-threshold 402653184
                   gc-cons-percentage 0.6)
             (garbage-collect)) t)

(add-hook 'emacs-startup-hook  ;; Profile emacs startup
          (lambda ()
            (message "*** Emacs loaded in %s with %d garbage collections."
                     (format "%.2f seconds"
                             (float-time
                              (time-subtract after-init-time before-init-time)))
                     gcs-done)))

I have messed up gc-cons-threshold or gc-cons-percentage. Removing those line seems like solved the pause and drop of the Control modifier key.