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When I use eldoc, I add this to .emacs:

 (add-hook 'emacs-lisp-mode-hook 'turn-on-eldoc-mode)
 (add-hook 'lisp-interaction-mode-hook 'turn-on-eldoc-mode)
 (add-hook 'ielm-mode-hook 'turn-on-eldoc-mode)

and then when I use Emacs, it uses 100% CPU. But when I delete this code in .emacs, my Emacs works.

Does anyone have any idea about this? Or how to debug the problem.

Or something else to substitute for eldoc?

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