On Sun, 2002-02-03 at 12:12, Mike Frazer wrote:
> Your reply piqued my curiosity so I whipped together a script that times the
> execution of a foreach(), a while() and a for() loop executing the same
> commands. The results were rather surprising in some ways but not really
> overall.
>
> The while() loop is, as you stated, is quicker than a foreach() loop.
> However, the for() loop is the fastest of all three. Below are the results
> of three tests:
Odd.. I get the opposite result:
Running test_foreach() 5000 times...2.6176570653915 seconds
Running test_for() 5000 times...3.0155370235443 seconds
Running test_while() 5000 times...2.0656290054321 seconds
Results:
test_foreach_1: 2.6176570653915
test_for_2: 3.0155370235443
test_while_3: 2.0656290054321
Using the following code:
<?php
error_reporting(E_ALL);
function test_while() {
global $upload_file;
reset($upload_file);
foreach ($upload_file as $line) {
$num_pipes = substr_count($line, '|');
if ($num_pipes < 2 || $num_pipes > 4) {
return false;
}
}
return true;
}
function test_foreach() {
global $upload_file;
reset($upload_file);
while (list(, $line) = each($upload_file)) {
$num_pipes = substr_count($line, '|');
if ($num_pipes < 2 || $num_pipes > 4) {
return false;
}
}
return true;
}
function test_for() {
global $upload_file;
for ($i = 0; $i < count($upload_file); $i++) {
$num_pipes = substr_count($upload_file[$i], '|');
if ($num_pipes < 2 || $num_pipes > 4) {
return false;
}
}
return true;
}
$filename = 'testpipes.txt';
$upload_file = file($filename);
speedtest(array('test_foreach',
'test_for',
'test_while'), 5000);
?>
Curioser and curiouser....
Torben
--
Torben Wilson <[EMAIL PROTECTED]>
http://www.thebuttlesschaps.com
http://www.hybrid17.com
http://www.inflatableeye.com
+1.604.709.0506
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