Org files lead to sluggish behavior

Symptoms

I'm sorry I don't have much concrete info as to why, but here's what I know so far:

Org files upwards of around 1000 lines get very sluggish
"Sluggish" means slow input response. It can be as bad as multiple seconds before inputs are reflected in the display
It doesn't seem to strongly depend on line length, it might also be depth but even 3 levels is enough
Some files fail to open at all (too slow? Emacs hang)
Disabling org-bullets doesn't help

Environment

Org file modes

Enabled minor modes: Async-Bytecomp-Package Auto-Composition
Auto-Compression Auto-Encryption Cl-Old-Struct-Compat Company
Dumb-Jump Ede Electric-Indent File-Name-Shadow Font-Lock
Global-Auto-Revert Global-Company Global-Ede Global-Eldoc
Global-Font-Lock Global-Git-Commit Global-Linum
Global-Semantic-Idle-Scheduler Global-Semantic-Stickyfunc
Global-Semanticdb Global-Undo-Tree Helm Line-Number Linum
Magit-Auto-Revert Mouse-Wheel Org-Bullets Override-Global Projectile
Pyvenv Recentf Semantic Shell-Dirtrack Show-Paren Tooltip
Transient-Mark Undo-Tree Which-Key Yas Yas-Global

init.el

;;; package --- Main init file
;;; Commentary:
;;; This is my init file

;;; Code:

;; Added by Package.el.  This must come before configurations of
;; installed packages.  Don't delete this line.  If you don't want it,
;; just comment it out by adding a semicolon to the start of the line.
;; You may delete these explanatory comments.
;; (package-initialize)

(add-to-list 'load-path (concat user-emacs-directory "elisp"))

;; Set default font
(set-face-attribute 'default nil
                    :family "Monkey"
                    :height 120
                    :weight 'normal
                    :width 'normal)

(require 'base)
(require 'base-theme)
(require 'base-extensions)
(require 'base-functions)
(require 'base-global-keys)

(require 'lang-python)

(require 'lang-ruby)

(require 'lang-go)

(require 'lang-javascript)

(require 'lang-web)

(require 'lang-rust)

(require 'lang-c)

(blink-cursor-mode 0)
(put 'scroll-left 'disabled nil)

; Cut shell CRs from bash or something
(add-hook 'comint-output-filter-functions
          'comint-strip-ctrl-m)

(setq company-idle-delay 0.5)
(setq company-tooltip-idle-delay 0.5)

(require 'projectile)
(define-key projectile-mode-map (kbd "C-c C-p") 'projectile-command-map)
(define-key projectile-mode-map (kbd "C-c p") 'projectile-command-map)

(require 'helm)
(global-set-key (kbd "M-y") 'helm-show-kill-ring)
(global-set-key (kbd "C-s") 'helm-swoop)

(require 'browse-at-remote)
(global-set-key (kbd "C-c g") 'browse-at-remote)

(require 'magit-gh-pulls)
(add-hook 'magit-mode-hook 'turn-on-magit-gh-pulls)

(server-start)

(version)

GNU Emacs 27.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.22.30, cairo version 1.15.10) of 2020-09-19

editor-bootstrap / emacs-bootstrap

Org files lead to sluggish behavior #58

Symptoms

Environment

Org file modes

init.el

(version)