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Re: Font-lock in COMINT modes
From: |
Stefan Monnier |
Subject: |
Re: Font-lock in COMINT modes |
Date: |
Mon, 18 Dec 2006 15:38:34 -0500 |
User-agent: |
Gnus/5.11 (Gnus v5.11) Emacs/22.0.91 (gnu/linux) |
>> I listed in FOR-RELEASE that this case is slow:
>>
>> You must have gotten that impression from Stefan's 12/08 message:
>>
>> if [font-lock-defaults ] is nil font-lock-mode-internal is not
>> activated at all. AFAIK nil and (nil t) are equivalent (i.e. don't
>> highlight anything), except that (nil t) takes a lot more CPU to do
>> nothing (it runs all the font-lock-foo-function hooks, enables
>> jit-lock so as to do nothing just-in-time rather than eagerly,
>> checks where nothing needs to be done, rounds up to a whole number
>> of lines the region upon which inaction is requested, checks if
>> there's a multiline entity and extends the region even more, so that
>> nothing is done in a multiline way, ...).
>>
>> Even though it is true that font lock jumps through more hoops with
>> (nil t), there is no evidence that this slowdown affects the user.
>>
>>
>> Could you check and see?
> I haven't been able to observe any slowdown when font-lock-defaults is
> (nil t). Not surprising, since I don't notice any slowdown when
> font-lock-defaults is (something t), i.e. normal font-lock situations!
> Maybe someone running on a 486 can observe a difference, who knows.
Indeed, the "slowdown" should be completely and absolutely neligible, even
on a 16MHz 386sx.
Stefan
- Font-lock in COMINT modes, JD Smith, 2006/12/06
- Re: Font-lock in COMINT modes, JD Smith, 2006/12/07
- Re: Font-lock in COMINT modes, JD Smith, 2006/12/07
- Re: Font-lock in COMINT modes, Richard Stallman, 2006/12/08
- Re: Font-lock in COMINT modes, JD Smith, 2006/12/08
- Re: Font-lock in COMINT modes, Stefan Monnier, 2006/12/08
- Re: Font-lock in COMINT modes, JD Smith, 2006/12/11
- Re: Font-lock in COMINT modes, Richard Stallman, 2006/12/12
- Message not available
- Re: Font-lock in COMINT modes, Richard Stallman, 2006/12/18
- Re: Font-lock in COMINT modes, Chong Yidong, 2006/12/18
- Re: Font-lock in COMINT modes,
Stefan Monnier <=
- Re: Font-lock in COMINT modes, Richard Stallman, 2006/12/20
- Re: Font-lock in COMINT modes, Stefan Monnier, 2006/12/20
- Re: Font-lock in COMINT modes, Richard Stallman, 2006/12/09