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Re: make-variable-buffer-local change

From: Dan Nicolaescu
Subject: Re: make-variable-buffer-local change
Date: Fri, 25 Sep 2009 14:25:12 -0700 (PDT)

Stefan Monnier <address@hidden> writes:

  > >> Isn't it slightly more efficient to access global bindings than buffer
  > >> local bindings,
  > > No.
  > Sorry, I think I misread.  The answer is "yes".
  > But the efficiency is the same for a variable after
  > make-variable-buffer-local as after make-local-variable.

So if you have:

(defvar foo nil)
(make-variable-buffer-local 'foo)

The do: (if (buffer-local-value 'foo) BLAH)


(defvar foo nil)

and then in very few buffers, majority do not change the value of foo:

(set (make-local-variable 'foo) 'bar)

and do the same computation:

(if (buffer-local-value 'foo) BLAH)

is one of these 2 versions more efficient than the other?

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