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I recently installed an Ubuntu VM, and I'm working on getting all set up. I've run into a small issue, in that my configuration now takes nearly 30 seconds to start up, where it used to be nearly instant.

I've narrowed the issue down to the (require 'ess-site) line in my configuration, but I haven't figured out how to speed it up or replace it. I need to load ess there so that I can do my next customization, which is (ess-toggle-underscore nil). Without the require, I get errors on that next line. Do I just have to deal with the slow startup time, or is there something I can do to speed this up?

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    A shot in the dark: did you bytecompile it? Bytecompiled ELisp code typically loads faster. There's also eval-after-load macro you could try, if loading ESS isn't essential at startup (can be delayed until actually used). – wvxvw Jul 10 '15 at 22:21
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    Why don't you use eval-after-load? – lunaryorn Jul 11 '15 at 12:20
  • Thank you. I didn't use it because, even after a year and a half of using emacs, I still don't know what I'm doing. Feel free to post an answer, one of you, and I'll mark it correct. – Ryan Jul 11 '15 at 23:56
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Rather than using require in the init file, I've switched to eval-after-load for most things.

So where the line before read:

(require 'ess-site)
(ess-toggle-underscore nil)

I now have

(eval-after-load 'ess-site '(ess-toggle-underscore nil))

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