Package: mutt
Version: 1.5.20-8
Severity: normal
There is no way in hell this should actually be true, but it is. I ran
an actual benchmark to prove it. Maybe there is a bug in the current
SID version of TC, maybe mutt isn't using it in an optimal manner, I
don't know. But for the current way mutt handles the hcache, GDBM is
outperforming TC.
The mailbox size tested was 47,317 messages. I ran a baseline test
without any hcache involved and then two tests with the two hcache
backends:
1. time to build the hcache
2. time to load the existing hcache
* I got mutt to terminate immediately after mailbox load by throwing a
exit(0) on line 696 of mx.c
* For all tests I did a dummy run to prime the disk cache.
Here is our baseline test case, loading from the cache should be
faster than this, creating the cache should be slower:
Mutt w/o hcache
1 2 3 avg
real 2.944 2.910 2.910 2.921
user 1.584 1.660 1.772 1.672
sys 1.368 1.252 1.136 1.252
Mutt w/ GDBM:
Building hcache:
real 5.268 5.187 5.182 5.212
user 1.968 2.148 2.012 2.043
sys 2.356 2.072 2.212 2.213
Loading existing hcache:
real 0.950 0.906 0.952 0.936
user 0.452 0.380 0.340 0.391
sys 0.468 0.528 0.572 0.523
Mutt w/ TokyoCabinet
Building hcache:
real 9.007 8.907 8.974 8.963
user 7.000 6.916 6.744 6.887
sys 1.756 1.820 2.004 1.860
Loading existing hcache:
real 2.429 2.432 2.429 2.430
user 1.936 1.972 1.892 1.933
sys 0.488 0.452 0.536 0.492
TokyoCabinet is significantly slower than gdbm here and only barely
faster than not using an hcache at all. Based on this, I have to ask
that mutt's hcache be switched back to GDBM until this is improved.
Since bug 530670 referenced IMAP, I thought I should be fair and run a
test against an IMAP server too. I happen to have a mailbox on IMAP with
26,579 messages on it. (Hypothesis: network latency, not hcache
backend performance, is the bottleneck here)
Mutt w/o hcache
no-cache:
real 149.220 143.424 140.908 144.517
user 2.520 2.688 2.740 2.649
sys 1.084 1.048 0.956 1.029
Mutt w/ GDBM
Building hcache:
real 171.871 139.978 155.925
user 1.968 2.832 2.400
sys 2.356 1.800 2.078
Loading existing hcache:
real 14.711 14.841 13.577 14.376
user 0.732 0.768 0.836 0.779
sys 0.448 0.420 0.404 0.424
Mutt w/ TokyoCabinet
Building hcache:
real 165.273 143.932 154.603
user 3.400 3.328 3.364
sys 1.160 1.224 1.192
Loading existing hcache:
real 14.570 13.904 13.148 13.874
user 0.976 1.020 1.068 1.021
sys 0.468 0.392 0.328 0.396
The only conclusion I can draw from this is that the hcache backend is
mostly irrelevant to IMAP performance. Both are far superior to no
caching and the performance difference between the two is largely
insigificant compared to the overall runtimes caused by network latency.
-- Package-specific info:
Mutt 1.5.20 (2009-06-14)
Copyright (C) 1996-2009 Michael R. Elkins and others.
Mutt comes with ABSOLUTELY NO WARRANTY; for details type `mutt -vv'.
Mutt is free software, and you are welcome to redistribute it
under certain conditions; type `mutt -vv' for details.
System: Linux 2.6.32-5-amd64 (x86_64)
ncurses: ncurses 5.7.20100313 (compiled with 5.7)
libidn: 1.18 (compiled with 1.18)
hcache backend: tokyocabinet 1.4.37
Compile options:
-DOMAIN
+DEBUG
-HOMESPOOL +USE_SETGID +USE_DOTLOCK +DL_STANDALONE +USE_FCNTL -USE_FLOCK
+USE_POP +USE_IMAP +USE_SMTP
-USE_SSL_OPENSSL +USE_SSL_GNUTLS +USE_SASL +USE_GSS +HAVE_GETADDRINFO
+HAVE_REGCOMP -USE_GNU_REGEX
+HAVE_COLOR +HAVE_START_COLOR +HAVE_TYPEAHEAD +HAVE_BKGDSET
+HAVE_CURS_SET +HAVE_META +HAVE_RESIZETERM
+CRYPT_BACKEND_CLASSIC_PGP +CRYPT_BACKEND_CLASSIC_SMIME +CRYPT_BACKEND_GPGME
-EXACT_ADDRESS -SUN_ATTACHMENT
+ENABLE_NLS -LOCALES_HACK +COMPRESSED +HAVE_WC_FUNCS +HAVE_LANGINFO_CODESET
+HAVE_LANGINFO_YESEXPR
+HAVE_ICONV -ICONV_NONTRANS +HAVE_LIBIDN +HAVE_GETSID +USE_HCACHE
-ISPELL
SENDMAIL="/usr/sbin/sendmail"
MAILPATH="/var/mail"
PKGDATADIR="/usr/share/mutt"
SYSCONFDIR="/etc"
EXECSHELL="/bin/sh"
MIXMASTER="mixmaster"
To contact the developers, please mail to <mutt-...@mutt.org>.
To report a bug, please visit http://bugs.mutt.org/.
debian-specific/467432-write_bcc.patch
debian-specific/Md.etc_mailname_gethostbyname.diff
debian-specific/Muttrc
debian-specific/assumed_charset-compat
debian-specific/build_doc_adjustments.diff
debian-specific/correct_docdir_in_man_page.diff
debian-specific/document_debian_defaults
debian-specific/dont_document_not_present_features.diff
debian-specific/sort-patchlist
debian-specific/use_usr_bin_editor.diff
features-old/patch-1.5.4.vk.pgp_verbose_mime
features/compressed-folders
features/compressed-folders.debian
features/ifdef
features/purge-message
features/sensible_browser_position
features/trash-folder
features/xtitles
misc/am-maintainer-mode
misc/define-pgp_getkeys_command.diff
misc/gpg.rc-paths
misc/hg.pmdef.debugtime
misc/hyphen-as-minus.patch
misc/smime.rc
misc/smime_keys-manpage.patch
mutt.org
upstream/228671-pipe-mime.patch
upstream/311296-rand-mktemp.patch
upstream/383769-score-match.patch
upstream/393926-internal-viewer.patch
upstream/528233-readonly-open.patch
upstream/531430-imapuser.patch
upstream/533209-mutt_perror.patch
upstream/533370-pgp-inline.patch
upstream/533439-mbox-time.patch
upstream/533459-unmailboxes.patch
upstream/533520-signature-highlight.patch
upstream/534543-imap-port.patch
upstream/535096-pop-port.patch
upstream/537694-segv-imap-headers.patch
upstream/537818-emptycharset.patch
upstream/538128-mh-folder-access.patch
upstream/542344-dont_fold_From_
upstream/542817-smimekeys-tmpdir.patch
upstream/542910-search-segfault.patch
upstream/543467-thread-segfault.patch
upstream/544180-italian-yesorno.patch
upstream/544794-smtp-batch.patch
upstream/545316-header-color.patch
upstream/547739-manual-typos.patch
upstream/547980-smime_keys-chaining.patch
upstream/548494-swedish-intl.patch
upstream/548577-gpgme-1.2.patch
upstream/553238-german-intl.patch
upstream/553321-ansi-escape-segfault.patch
upstream/557395-muttrc-crypto.patch
upstream/568295-references.patch
upstream/573823-imap_internal_date
-- System Information:
Debian Release: squeeze/sid
APT prefers unstable
APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)
Kernel: Linux 2.6.32-5-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages mutt depends on:
ii libc6 2.11.1-3 Embedded GNU C Library: Shared lib
ii libcomerr2 1.41.12-2 common error description library
ii libgnutls26 2.8.6-1 the GNU TLS library - runtime libr
ii libgpg-error0 1.6-1 library for common error values an
ii libgpgme11 1.2.0-1.2 GPGME - GnuPG Made Easy
ii libgssapi-krb5-2 1.8.1+dfsg-5 MIT Kerberos runtime libraries - k
ii libidn11 1.18-1 GNU Libidn library, implementation
ii libk5crypto3 1.8.1+dfsg-5 MIT Kerberos runtime libraries - C
ii libkrb5-3 1.8.1+dfsg-5 MIT Kerberos runtime libraries
ii libncursesw5 5.7+20100313-2 shared libraries for terminal hand
ii libsasl2-2 2.1.23.dfsg1-5 Cyrus SASL - authentication abstra
ii libtokyocabinet8 1.4.37-6 Tokyo Cabinet Database Libraries [
Versions of packages mutt recommends:
ii libsasl2-modules 2.1.23.dfsg1-5 Cyrus SASL - pluggable authenticat
ii locales 2.11.1-3 Embedded GNU C Library: National L
ii mime-support 3.48-1 MIME files 'mime.types' & 'mailcap
ii postfix [mail-transport-a 2.7.0-1 High-performance mail transport ag
Versions of packages mutt suggests:
pn aspell | ispell <none> (no description available)
ii ca-certificates 20090814 Common CA certificates
ii gnupg 1.4.10-4 GNU privacy guard - a free PGP rep
pn mixmaster <none> (no description available)
ii openssl 0.9.8o-1 Secure Socket Layer (SSL) binary a
pn urlview <none> (no description available)
Versions of packages mutt is related to:
ii mutt 1.5.20-8 text-based mailreader supporting M
pn mutt-dbg <none> (no description available)
pn mutt-patched <none> (no description available)
-- no debconf information
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