Some changes to init file to increase loading speed

init.el

@@ -1,4 +1,5 @@
-(setq package-quickstart t)
+(setq gc-cons-threshold 100000000)
+(add-hook 'after-init-hook (lambda () (setq gc-cons-threshold 800000)))
 
 ;; (add-hook 'emacs-startup-hook
 ;;           (lambda ()
@@ -462,6 +463,7 @@
   (require 'shrface))
 
 (use-package nov
+  :defer t
   :hook ((nov-mode . visual-line-mode)
          (nov-mode . mk/nov-font-settings))
   :mode ("\\.epub\\'" . nov-mode)
@@ -487,6 +489,7 @@
 
 
 (use-package sql
+  :defer t
   :config
   (setq sql-connection-alist
         '((finance-db
@@ -616,6 +619,7 @@
          :render  (gt-buffer-render))))
 
 (use-package magit
+  :defer t
   :bind ("C-x g" . magit-status)
   :init
   (when (eq system-type 'windows-nt)
@@ -1244,8 +1248,7 @@ Uses `mk/hyperspec-dir-locations' to find the directory."
 
 (use-package elfeed
   :bind ("C-x w" . elfeed)
-  :init
-  (setq elfeed-feeds
+  :init (setq elfeed-feeds
               '(("https://netzpolitik.org/feed/" netz politik news)
                 ("https://www.marcuskammer.dev/weblog/index.xml" personal)
                 ("https://www.guyrutenberg.com/feed/" linux blog)
@@ -1337,7 +1340,9 @@ Uses `mk/hyperspec-dir-locations' to find the directory."
                 ("https://feed.theregister.com/atom?a=Liam%20Proven" register foss)
                 ("https://benswift.me/feed.xml" blog creative technology emacs computing)
                 ))
-  (setq elfeed-search-filter "@7-day-ago +unread")
+  :custom
+  (elfeed-search-filter "@7-day-ago +unread")
+  :config
   (let ((feeds (expand-file-name "~/feeds.el")))
     (when (file-exists-p feeds)
       (load-file feeds))))
@@ -1655,6 +1660,7 @@ Uses `mk/hyperspec-dir-locations' to find the directory."
      ("columns" "fullflexible")))
   (org-latex-inputenc-alist '((\"utf8\" . \"utf8x\")))
   :config
+  (add-to-list 'org-file-apps '("\\.pdf\\'" . emacs))
   (if (eq system-type 'windows-nt)
       (setq org-babel-python-command "python")
     (setq org-babel-python-command "python3"))
@@ -1943,6 +1949,7 @@ Uses `mk/hyperspec-dir-locations' to find the directory."
 (require 'request)
 
 (use-package org-roam
+  :defer t
   :after org
   :init
   (setq org-roam-db-autosync-mode t)