From: "Aaron Voisine" <[EMAIL PROTECTED]>
I read in the docs several comments that $_SESSION is slower that other
arrays. One
comment even had benchmarking info indicating it was about half as
fast. I don't understand
why this should be. Isn't $_SESSION just a normal super global array
like any other, except that it get serialized and written to disk *once at the end* of a
request? Why on earth would this impact the performance of reading and
writing in the middle of a request? Is there some
funkyness going on under the covers that I'm missing? Can it be made to
work as I described?
Do you have links to these "docs"??
The following code gives me this: Normal $val: 9.4890594482422E-05 Session var: 1.1920928955078E-05
<?php
function gt() { list($usec, $sec) = explode(" ", microtime()); return ((float)$usec + (float)$sec); }
session_start();
$s1 = gt(); $val['key'] = array('foo'); $e1 = gt();
$s2 = gt(); $_SESSION['key'] = array('foo'); $e2 = gt();
echo 'Normal $val: ' . ($e1 - $s1) . '<br />Session var: ' . ($e2-$s2);
?>
Sligtly modified code, $_SESSION is almost always faster then regular variable. I even tried testing $_SESSION first, then $val, same result. Now why is it so?
<?php
function gt()
{
list($usec, $sec) = explode(" ", microtime());
return ((float)$usec + (float)$sec);
}session_start(); $val = array();
$s1 = gt();
for($i = 0; $i < 50000; $i++) {
$val['key' . $i] = array('foo');
}
$e1 = gt();$s2 = gt();
for($i = 0; $i < 50000; $i++) {
$_SESSION['key' . $i] = array('foo');
}
$e2 = gt();echo 'Normal $val: ' . ($e1 - $s1) . '<br />Session var: ' . ($e2-$s2);
?>
-- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
