* nnmaildir: Performance in nnmaildir-request-update-info
@ 2007-12-01 22:29 Christian Plate
2007-12-02 0:32 ` Paul Jarc
0 siblings, 1 reply; 4+ messages in thread
From: Christian Plate @ 2007-12-01 22:29 UTC (permalink / raw)
To: ding
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Hello,
I found a performance problem in nnmaildir and think i solved it.
Problem: I have various maildirs with >9000 mails. If i read a new
mail, quit the group and then hit "gnus-group-get-new-news" in the
Groups-buffer, it takes 30s till i get an updated Groups-buffer.
Profiling shows that nnmaildir-request-update-info is to
blame. gnus-add-to-range is called for every single article which is
found in the markdirs.
I changed the implementation to collect all article numbers in a list
and then call gnus-add-to-range only once with that list of article
numbers.
This causes a huge performance gain on my machine. For my big
mailboxes now the time for gnus-group-get-new-news is only 0.3s.
Unfortunately I don't have a working installation of latest gnus
sources. I used:
GNU Emacs 22.1.1 (i686-pc-linux-gnu, GTK+ Version 2.6.4) of 2007-06-09 on rhada
Therefore I attached a tar file containing my patch and two dirs: "old"
contains the version i based my work on. "new" contains my patch.
Please take a look at it. For me this delay was a major flaw in my
daily work with nnmaildir. It would be great if a change like this
could be integrated into gnus/emacs.
Thanks for your attention,
Christian
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2007-12-01 22:29 nnmaildir: Performance in nnmaildir-request-update-info Christian Plate
2007-12-02 0:32 ` Paul Jarc
2007-12-02 11:51 ` Christian Plate
2007-12-06 5:51 ` Paul Jarc
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