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Re: Default of jit-lock-stealth-time
From: |
Eli Zaretskii |
Subject: |
Re: Default of jit-lock-stealth-time |
Date: |
Sat, 03 Mar 2007 15:22:50 +0200 |
> From: Richard Stallman <address@hidden>
> CC: address@hidden
> Date: Thu, 01 Mar 2007 03:14:08 -0500
>
> My recollection is that they do annoy, but I will need to time things
> to give more accurate information instead of hand-waving.
>
> I don't need _more accurate_ information, just confirmation. I would
> like you to try turning off stealth fontification and see if you are
> frequently annoyed by the need to fontify on the fly.
I mostly use very fast (3 Ghz) machines nowadays, which are not easily
forced into annoying delays. I could try to find a slower machine,
but I need to know what is the clock speed we consider as
``reference'' for such investigations. That is, with what slow clock
speeds we would still like Emacs to be reasonably responsive?
On a 3-GHz machine, with jit-lock-stealth-time set to nil, I measure a
consistent 5-10% increase in CPU time when paging up thru sufficiently
long Texinfo documents wrt to an already fontified buffer (18%-25%
percent the first time I page up, vs 10%-16% on subsequent attempts).
By contrast, with the default setting of jit-lock-stealth-time I see
only 1-3% of CPU being used while stealth fontification runs in the
background, which is barely distinguishable from a totally idle
machine.
Re: Default of jit-lock-stealth-time,
Eli Zaretskii <=
Re: Default of jit-lock-stealth-time, David Kastrup, 2007/03/04
Re: Default of jit-lock-stealth-time, Eli Zaretskii, 2007/03/04