From: Marc Chantreux <eiro@phear.org>
To: Zsh Users <zsh-users@zsh.org>
Subject: zsh poor performances while reading and testing ?
Date: Wed, 3 Jul 2019 15:58:24 +0200 [thread overview]
Message-ID: <20190703135824.GA19289@prometheus.u-strasbg.fr> (raw)
hello people,
i recently made a benchmark to emphasize the gain of speed
people can have using filters instead of pure shell loops.
however i was surprised to see how slow zsh is compared to
other shells when it comes to read data.
the interesting part of the benchmark is:
for it (bash zsh ksh) {
TIMEFMT=": $it %U %S %E"
time $it -c 'while read it; do : ; done < x > /dev/null'
}
: bash 4,95s 1,21s 6,18s
: zsh 12,65s 28,12s 40,82s
: ksh 9,87s 26,52s 36,42s
is there any obvious reason for that? is there a way to make
it faster without diving in the C code?
regards,
marc
next reply other threads:[~2019-07-03 13:59 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-03 13:58 Marc Chantreux [this message]
[not found] <20190703135824.GA19289__20170.6622539618$1562162400$gmane$org@prometheus.u-strasbg.fr>
2019-07-03 14:28 ` Stephane Chazelas
2019-07-05 13:28 ` Marc Chantreux
2019-07-05 13:44 ` Peter Stephenson
2019-07-05 14:21 ` Marc Chantreux
2019-07-05 14:29 ` Peter Stephenson
2019-07-05 15:53 ` Marc Chantreux
2019-07-05 13:44 ` Mikael Magnusson
[not found] ` <20190705132842.GA21074__38577.2207098611$1562333415$gmane$org@prometheus.u-strasbg.fr>
2019-07-05 18:05 ` Stephane Chazelas
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