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From: Nordlöw <per.nordlow@gmail.com>
To: help-gnu-emacs@gnu.org
Subject: Use of purecopy()
Date: Tue, 3 Nov 2009 02:00:56 -0800 (PST)	[thread overview]
Message-ID: <7db147f3-8de9-4b69-b7e0-d8e1a9983cc6@m26g2000yqb.googlegroups.com> (raw)

I have seen a lot adding of purecopy() to Emacs CVS.
Why? Does it reduce memory use and performance?
Should it be used everywhere we have static string initializations in
emacs-lisp code?

I discovered it in Emacs CVS python.el and I have seen that emacs/lisp/
ChangeLog contains lots of such changes.
Here are two sample lines taken from python.el
  (add-to-list 'auto-mode-alist (cons (purecopy "\\.py\\'")  'python-
mode))
  (add-to-list 'same-window-buffer-names (purecopy "*Python*"))
Is this some special case where purecopy() is especially motivated?

Thanks in advance,
Nordlöw


                 reply	other threads:[~2009-11-03 10:00 UTC|newest]

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