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To: Robert Elz <kre@munnari.OZ.AU>
Cc: exmh-workers@example.com
Subject: Re: New Sequences Window
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> From: Robert Elz <kre@munnari.OZ.AU>
> Date: Wed, 28 Aug 2002 21:44:26 +0700
>
> Date: Wed, 28 Aug 2002 09:22:34 -0500
> From: Chris Garrigues <cwg-dated-1030976555.34ad5b@DeepEddy.Com>
> Message-ID: <1030544555.28815.TMDA@deepeddy.vircio.com>
>
>
> | so I'll probably poke around at the sequences performance issues,
>
> Well, there's this wonderful piece of code in MhSeqExpand ...
>
> # Hack to weed out sequence numbers for messages that don't exist
> foreach m $rseq {
> if ![file exists $mhProfile(path)/$folder/$m] {
> Exmh_Debug $mhProfile(path)/$folder/$m not found
> set ix [lsearch $seq $m]
> set seq [lreplace $seq $ix $ix]
> } else {
> # Real hack
> break
> }
> }
>
> which is going to run slow if a sequence happens to start with a bunch
> of messages that don't exist. I'm not sure why it is important that the
> first message in the sequence returned exists, but not necessarily any
> of the others, but I'm sure glad it is, as MhSeqExpand gets called lots,
> and I don't know if I could cope if it were checking every file in the
> sequences it is looking at, all the time...
Although my fingerprints are all over that, it's not actually my code and has
been in there since before 1998. (It's code that I moved from mh.tcl to
sequences.tcl and back again). I'm no5 sure either, but it should be a
one-time penalty because the sequence will be re-written with the bad messages
removed. (I think.)
> It may help to keep a list of the valid message numbers for the current
> folder (though that would then need to be verified against changes to the
> directory). Does tcl have a directory read function? I assume so...
>
> Mh_Sequence also goes and rereads the files (.mh_sequences and the
> context file) but I'm not sure how frequently that one is called.
That *was* a problem, but if you look at Mh_Sequence (and Mh_Sequences and
Mh_SequenceUpdate), they all call MhReadSeqs to do the actual reading and it
only reads the sequences if the file has been touched. Look for the
"Exmh_Debug Reading $filename" output in the debug log to see when sequences
are actually reread from disk.
My theory is that Ftoc_ShowSequences is being called too often. I'm about to
investigate that.
> | I'll email anything I figure out since I'm leaving town in less
> | than 48 hours.
>
> Have a good vacation.
Thanks.
Chris
--
Chris Garrigues http://www.DeepEddy.Com/~cwg/
virCIO http://www.virCIO.Com
716 Congress, Suite 200
Austin, TX 78701 +1 512 374 0500
World War III: The Wrong-Doers Vs. the Evil-Doers.
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