I'm trying to set up Emacs with rust-lsp ( following this guide). The suggestions from the rust-analyzer are being picked up as you can see in the screenshot.
But when I attempt to scroll through them more than one arrow click at a time(holding either the arrow or k/j down), Emacs hangs for a second and then jumps to the suggestion in the list. So the experience is really janky.
How can I debug something like this? I'm new to Emacs and have little idea of what to look at here, except I know that company is the completion framework that the lsp feeds.
Below is part of config relevant to the lsp.
(use-package rustic
:ensure
:bind (:map rustic-mode-map
("M-j" . lsp-ui-imenu)
("M-?" . lsp-find-references)
("C-c C-c l" . flycheck-list-errors)
("C-c C-c a" . lsp-execute-code-action)
("C-c C-c r" . lsp-rename)
("C-c C-c q" . lsp-workspace-restart)
("C-c C-c Q" . lsp-workspace-shutdown)
("C-c C-c s" . lsp-rust-analyzer-status))
:config
;; uncomment for less flashiness
;; (setq lsp-eldoc-hook nil)
;; (setq lsp-enable-symbol-highlighting nil)
;; (setq lsp-signature-auto-activate nil)
;; comment to disable rustfmt on save
(setq rustic-format-on-save t)
(add-hook 'rustic-mode-hook 'rk/rustic-mode-hook))
(defun rk/rustic-mode-hook ()
(when buffer-file-name
(setq-local buffer-save-without-query t)))
(use-package lsp-mode
:ensure
:commands lsp
:custom
;; what to use when checking on-save. "check" is default, I prefer clippy
(lsp-rust-analyzer-cargo-watch-command "clippy")
(lsp-eldoc-render-all t)
(lsp-idle-delay 0.6)
(lsp-rust-analyzer-server-display-inlay-hints t)
:config
(add-hook 'lsp-mode-hook 'lsp-ui-mode))
(use-package lsp-ui
:ensure
:commands lsp-ui-mode
:custom
(lsp-ui-peek-always-show t)
(lsp-ui-sideline-show-hover t)
(setq gc-cons-threshold 100000000)
(setq read-process-output-max (* 1024 1024)) ;; 1mb
(setq lsp-use-plists t)
(setq lsp-idle-delay 0.10)
(lsp-ui-doc-enable nil))
(use-package company
:ensure
:custom
(company-idle-delay 0) ;; how long to wait until popup
;; (company-begin-commands nil) ;; uncomment to disable popup
:bind
(:map company-active-map
("C-n". company-select-next)
("C-p". company-select-previous)
("M-<". company-select-first)
("M->". company-select-last)))
(use-package yasnippet
:ensure
:config
(yas-reload-all)
(add-hook 'prog-mode-hook 'yas-minor-mode)
(add-hook 'text-mode-hook 'yas-minor-mode))
(use-package flycheck :ensure)
