gistfile1.php

<?php

/*
optimalisation for path modification
dirname returns an \ on dirname('/') under windows

case 1: 'the right way' check if this is the case, and if so, fixit
case 1: 'the ugly way' just fixit

it is normal for this code path to be hit +1milion times per request

 */

$max = 1000000;
$starttime1 = microtime(true);

$path = '/test/stuffs/';

for ($i =0; $i<$max; $i++) {
    if ($path[0] === '\\') {
        $path[0] = '/';
    }
}
$endtime1 = microtime(true);
echo 'the right way:'.($endtime1 - $starttime1)."<br>\n";
echo "<br>\n";


$starttime2 = microtime(true);

for ($i =0; $i<$max; $i++) {
    $path[0] = '/';
}
$endtime2 = microtime(true);
echo 'the ugly way:'.($endtime2 - $starttime2)."<br>\n";
echo "<br>\n";

/*
    next case adding an / after dirname() stripped it away
    option 1: test if path[1] is set, ifso add a slash
    option 2: test if the strlen is longer then 1
*/

$max = 1000000;
$starttime1 = microtime(true);

$path = '/test/stuffs/';

for ($i =0; $i<$max; $i++) {
    $testpath = dirname($path);
    if (isset($testpath[1])){
        $testpath .= '/';
    }
}
$endtime1 = microtime(true);
echo 'isset:'.($endtime1 - $starttime1)."<br>\n";
echo "<br>\n";


$starttime2 = microtime(true);

for ($i =0; $i<$max; $i++) {
    $testpath = dirname($path);
    if (strlen($testpath) >= 2){
        $testpath .= '/';
    }
}
$endtime2 = microtime(true);
echo 'strlen:'.($endtime2 - $starttime2)."<br>\n";
echo "<br>\n";