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Re: mark_object crash in 22.1 and latest CVS (as of tonight)
From: |
Stefan Monnier |
Subject: |
Re: mark_object crash in 22.1 and latest CVS (as of tonight) |
Date: |
Mon, 19 Nov 2007 02:50:10 -0500 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/23.0.50 (gnu/linux) |
>> It's an "optimization" and nothing more. In my book, if an
>> optimization is unsafe, it had better make a good case for itself.
>> As it stands I see no evidence that this optimization is ever
>> useful. As long as nobody can show us numbers that demonstrate a
>> measurable performance impact, I think we're better off without
>> this optimization.
>>
>> Yes, that's the crucial question. It should be easy to get some
>> numbers by running an interactive application that often uses
>> save-match-data and compare the memory usage and amount of GC of the
>> two versions.
Someone needs to write the "optimized" but correct version first.
> The problem is not the memory usage: garbage collection will set in
> anyway when the memory is tight.
> The problem is that editing becomes awfully slow in a buffer with many
> markers. And temporary markers created with save-match-data will only
> be unseated from the buffer once they get collected.
No: the current code (where I removed the `evaporate' optimization)
still unseats the markers right away. It just doesn't free them.
> Perhaps it would be a useful idea to have the "evaporate" argument only
> unseat the markers from the buffer (the equivalent of (move-marker
> marker nil)) without garbage-collecting it.
That's already what the `unseat' argument does (which used to accept
a special `evaporate' value to imply that it shouldn't just unseat but
also free).
Stefan
- Re: mark_object crash in 22.1 and latest CVS (as of tonight), (continued)
- Re: mark_object crash in 22.1 and latest CVS (as of tonight), Stefan Monnier, 2007/11/16
- Re: mark_object crash in 22.1 and latest CVS (as of tonight), martin rudalics, 2007/11/16
- Re: mark_object crash in 22.1 and latest CVS (as of tonight), Stefan Monnier, 2007/11/16
- Re: mark_object crash in 22.1 and latest CVS (as of tonight), Stefan Monnier, 2007/11/16
- Re: mark_object crash in 22.1 and latest CVS (as of tonight), Kalman Reti, 2007/11/16
- Re: mark_object crash in 22.1 and latest CVS (as of tonight), Stefan Monnier, 2007/11/16
- Re: mark_object crash in 22.1 and latest CVS (as of tonight), Richard Stallman, 2007/11/17
- Re: mark_object crash in 22.1 and latest CVS (as of tonight), Stefan Monnier, 2007/11/17
- Re: mark_object crash in 22.1 and latest CVS (as of tonight), Richard Stallman, 2007/11/18
- Re: mark_object crash in 22.1 and latest CVS (as of tonight), David Kastrup, 2007/11/18
- Re: mark_object crash in 22.1 and latest CVS (as of tonight),
Stefan Monnier <=
- Re: mark_object crash in 22.1 and latest CVS (as of tonight), Richard Stallman, 2007/11/19
- Re: mark_object crash in 22.1 and latest CVS (as of tonight), Richard Stallman, 2007/11/16
- Re: mark_object crash in 22.1 and latest CVS (as of tonight), Richard Stallman, 2007/11/14
- Re: mark_object crash in 22.1 and latest CVS (as of tonight), Kalman Reti, 2007/11/15
- Re: mark_object crash in 22.1 and latest CVS (as of tonight), Kalman Reti, 2007/11/16
- Re: mark_object crash in 22.1 and latest CVS (as of tonight), Stefan Monnier, 2007/11/16
- Re: mark_object crash in 22.1 and latest CVS (as of tonight), martin rudalics, 2007/11/16
Re: mark_object crash in 22.1 and latest CVS (as of tonight), Richard Stallman, 2007/11/13