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array_lookup.php
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array_lookup.php
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<?php
/**
* Benchmark tests for reading of file
* Usage: php -q array_lookup.php
*/
if(!function_exists('memory_get_usage')) {
function memory_get_usage() {
return -1;
}
}
if(PHP_SAPI != 'cli') {
die("Please run this script from command line");
}
$loops = 2000000;
if($_SERVER['argc'] == 1) {
$secs = array();
$results = array();
echo 'Running bench:';
for($i = 1; $i <= 2; $i++) {
$cmd = $_SERVER[_] . ' ' . $_SERVER['SCRIPT_FILENAME'] . ' ' . $i;
$ret = unserialize(`$cmd`);
$secs[] = $ret[1];
$results[] = $ret;
echo '.';
}
echo 'done' . PHP_EOL;
} else {
$array = array(array(array(array())));
for($i = 0; $i < 10; $i++) {
$array[0][0][0][$i] = $i;
}
switch ($_SERVER['argv'][1]) {
case '1':
$m = memory_get_usage();
$s = microtime(1);
for($i = 0; $i < $loops; $i++) {
$v = $array[0][0][0][0];
}
$return = array(
'$v = array[a][b][c][d];',
(microtime(1)-$s),
(memory_get_usage()-$m)
);
echo serialize($return);
break;
case '2':
$m = memory_get_usage();
$s = microtime(1);
$arr =& $array[0][0][0];
for($i = 0; $i < $loops; $i++) {
$v = $arr[0];
}
$return = array(
'$ref=&array[a][b][c]; $v=$ref[d];',
(microtime(1)-$s),
(memory_get_usage()-$m)
);
echo serialize($return);
break;
}
exit;
}
$php = PHP_VERSION;
$type = gettype($elem);
echo <<<head
access multidimensional array element in PHP v$php
+-------------------------------------+-------+----------+---------+
| description | sec | memory | % |
+-------------------------------------+-------+----------+---------+
head;
asort($secs);
$i = 0;
foreach ($secs as $k => $v) {
if($i == 0) {
$best = $results[$k][1];
$results[$k][3] = '100%';
} else {
$results[$k][3] = round(($results[$k][1] * 100) / $best) . '%';
}
echo sprintf(
"| %-35s | %-5s | %-8s | %-7s |\n+%'-37s+%'-7s+%'-10s+%'-9s+\n",
$results[$k][0],
round($results[$k][1],3),
$results[$k][2],
$results[$k][3],
'','','',''
);
$i++;
}
echo "\n\n";