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I have a ipython config which imports lots of packages.

I also have some configs in my python setup like

  (setq python-shell-interpreter "ipython3"
        python-shell-interpreter-args "-i --profile=ipy --simple-prompt --pprint")

Loading a lot of packages will cause slow ipython shell startup. But this also happens when python-mode is being enabled.

Moreover, even after opened a python file, when I use C-c C-p to start an interactive shell, the slow progress happens again. Here is the illustration

enter image description here

After removing the --profile=ipy part, both the mode enabling and interactive shell starting will have a significant speed up.

enter image description here

I can understand the slowness of starting an interactive shell process when with --profile=ipy, but not the python mode enabling.

My question is what is the appropriate way to avoid this ? As I don't see any shell process when python mode is being enabled. The mode enabling is still very slow. Thanks!

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2
  • Sorry for going off topic, but what theme are you using ?
    – Chakravarthy Raghunandan
    Oct 22, 2016 at 4:15
  • @ChakravarthyRaghunandan It's spacemacs-light-theme, available in ELPA.
    – Saddle Point
    Oct 22, 2016 at 4:35

1 Answer 1

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This is due to semantic-mode.

It will call python-shell-internal-send-string which depends on python-shell-interpreter and python-shell-interpreter-args.

Thus using a non-profile python-shell-interpreter-args to start this shell and set the profile one back after semantic-mode is enabled solves the problem.

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