From: nix@myproxylists.com
To: zsh-users@zsh.org
Subject: Why large arrays are extremely slow to handle?
Date: Fri, 25 Mar 2011 02:37:45 +0200 [thread overview]
Message-ID: <5c830d92034e61a01c96e6aa4d10798c.squirrel@gameframe.net> (raw)
Tested on AMD Phenom(tm) II X6 1090T Processor 3.6GHz using one core.
I think there's is a big flaw somewhere that causes the following:
#!/bin/zsh
emulate zsh
TEST=()
for i in {1..10000} ; do
TEST+="$i" # append (push) to an array
done
--- 10K
time ./bench
real 0m3.944s
--- 50K BOOOM! WTF?
time ./bench
real 1m53.321s
Does not make much sense to me. Im also a PHP developer. Just for
comparison, let's do the same with PHP.
<?php
$test = array();
for ($i=1; $i < 50000; $i++) {
$test[] = $i;
}
print_r($test);
?>
--- 10K
time php TEST_PHP
real 0m0.011s
--- 50K
time php TEST_PHP
real 0m0.025s
Any ideas why it's extremely slow? I have need to use very large arrays
(even over one million elements in a single array) but it's currently
impossible due to the above.
next reply other threads:[~2011-03-25 0:37 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-25 0:37 nix [this message]
2011-03-25 0:46 ` Mikael Magnusson
2011-03-25 1:12 ` nix
2011-03-25 2:29 ` Bart Schaefer
2011-03-25 2:50 ` nix
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