From: Helmut Jarausch <jarausch@igpm.rwth-aachen.de>
To: zsh-workers@zsh.org
Subject: 100,000 calls to rt_sigprocmask for a single <Tab>?
Date: Mon, 21 Oct 2013 12:29:20 +0200 [thread overview]
Message-ID: <1382351360.2595.0@numa-i.igpm.rwth-aachen.de> (raw)
Hi,
on one of my machines ZSH is incredibly slow for <tab> completion.
In a directory with a single executable 'hg_upd' and a single
subdirectory
./hg<tab>
takes more than 20 seconds. An strace shows that zsh executes nearly
100,000
calls to rt_sigprocmask like
mmap(NULL, 16384, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0x7ff4da23f000
then 2602 times
rt_sigprocmask(SIG_UNBLOCK, [WINCH], [CHLD WINCH], 8) = 0
rt_sigprocmask(SIG_BLOCK, [WINCH], [CHLD], 8) = 0
and this pattern about 20 times.
The whole strace log has 111,036 lines for just one entry of <tab>
What's wrong with my machine/installation?
I'm using zsh-5.0.2-dev-0 (GIT version) on my Gentoo system,
which is nearly "bleeding edge".
This problem is not knew, I've been just too lazy to run zsh under
strace.
Many thanks for a hint,
Helmut.
P.S. On a different but very similar machine this doesn't occur.
next reply other threads:[~2013-10-21 10:39 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-21 10:29 Helmut Jarausch [this message]
2013-10-21 15:30 ` Bart Schaefer
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