* font-lock-maximum-size
@ 2011-10-17 9:19 Chong Yidong
2011-10-17 14:00 ` font-lock-maximum-size Alan Mackenzie
2011-10-17 15:30 ` font-lock-maximum-size Stefan Monnier
0 siblings, 2 replies; 4+ messages in thread
From: Chong Yidong @ 2011-10-17 9:19 UTC (permalink / raw)
To: emacs-devel
font-lock-maximum-size is a variable defined in `font-lock.el'.
Its value is 256000
Documentation:
Maximum size of a buffer for buffer fontification.
Only buffers less than this can be fontified when Font Lock mode is
turned on.
Looks like this variable doesn't work, and hasn't worked for a long
time. It nothing when JIT lock mode is in use, and since fast-lock and
lazy-lock are obsolete, it's pretty useless. (Anyway, source files
larger than 250K are not uncommon.)
If there are no objections, I am going to mark it as deprecated, and
remove it from the manual.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: font-lock-maximum-size
2011-10-17 9:19 font-lock-maximum-size Chong Yidong
@ 2011-10-17 14:00 ` Alan Mackenzie
2011-10-17 15:30 ` font-lock-maximum-size Stefan Monnier
1 sibling, 0 replies; 4+ messages in thread
From: Alan Mackenzie @ 2011-10-17 14:00 UTC (permalink / raw)
To: Chong Yidong; +Cc: emacs-devel
Hi, Yidong.
On Mon, Oct 17, 2011 at 05:19:21AM -0400, Chong Yidong wrote:
> font-lock-maximum-size is a variable defined in `font-lock.el'.
> Its value is 256000
> Documentation:
> Maximum size of a buffer for buffer fontification.
> Only buffers less than this can be fontified when Font Lock mode is
> turned on.
> Looks like this variable doesn't work, and hasn't worked for a long
> time. It nothing when JIT lock mode is in use, and since fast-lock and
> lazy-lock are obsolete, it's pretty useless. (Anyway, source files
> larger than 250K are not uncommon.)
Doesn't it work when no font-lock-support-mode is in operation?
> If there are no objections, I am going to mark it as deprecated, and
> remove it from the manual.
I don't object - even if it were still operational, modern PCs are so
fast now that f-l-max-size would have to be so big to be sensible that it
would exceed the size of nearly all source code buffers.
However, please don't ever downplay the usefulness of (eq
f-l-support-mode nil). This is very useful for debugging f-l-keywords,
etc., and also works well when jit-lock doesn't - I've had quite a few
problems with font lock over the years, many of them being caused by a
jit-lock chunk starting in the middle of a (largish) syntactical
construct.
--
Alan Mackenzie (Nuremberg, Germany).
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: font-lock-maximum-size
2011-10-17 9:19 font-lock-maximum-size Chong Yidong
2011-10-17 14:00 ` font-lock-maximum-size Alan Mackenzie
@ 2011-10-17 15:30 ` Stefan Monnier
2011-10-18 3:11 ` font-lock-maximum-size Chong Yidong
1 sibling, 1 reply; 4+ messages in thread
From: Stefan Monnier @ 2011-10-17 15:30 UTC (permalink / raw)
To: Chong Yidong; +Cc: emacs-devel
> Looks like this variable doesn't work, and hasn't worked for a long
> time. It nothing when JIT lock mode is in use, and since fast-lock and
> lazy-lock are obsolete, it's pretty useless. (Anyway, source files
> larger than 250K are not uncommon.)
It does work, but only when setting font-lock-support-mode to nil
(which makes sense if you consider that the purpose was to avoid
performance problems with the eager fontification of large buffers).
> If there are no objections, I am going to mark it as deprecated, and
> remove it from the manual.
Fine by me, tho I agree with Alan that font-lock-support-mode is not
obsolete (it's indispensable to debug font-lock problems).
Stefan
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2011-10-18 3:11 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
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2011-10-17 9:19 font-lock-maximum-size Chong Yidong
2011-10-17 14:00 ` font-lock-maximum-size Alan Mackenzie
2011-10-17 15:30 ` font-lock-maximum-size Stefan Monnier
2011-10-18 3:11 ` font-lock-maximum-size Chong Yidong
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