Online PHP editor | perf for qa5KQ

@ 2016-01-17T01:20:05Z

<?php
function evalJS($code)
{
    $matches = [];
    $code = preg_match_all('#var (.*)( |=|;)#', '\$', $code, $matches);
    foreach($matches[1] as $val)
    {
        $code = preg_replace('#'.$val.'#', '\$'.$val, $code)
        $code = preg_replace('#var \$'.$val.'#', '\$'.$val, $code);
        $code = preg_replace('#\$'.$val.'\.#', '\$'.$val.'->', $code);
    }
    $code = preg_replace('#.#', '::', $code);
    $code = preg_replace('#(\'|")\+#', '$1.', $code);
    $code = preg_replace('#\+(\'|")#', '.$1', $code);
    echo($code);
    eval($code);
}
class document
{
    public function print($arg)
    {
        echo($arg);
    }
}

$js = <<<JS
var foo = 'Hello '+'World!';
document.print(foo);
JS;
evalJS($js);

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).

Version	System time (s)	User time (s)	Memory (MiB)
7.0.2	0.027	0.067	20.19
7.0.1	0.007	0.053	20.07
7.0.0	0.013	0.053	20.18
5.6.17	0.023	0.067	20.48
5.6.16	0.000	0.060	20.52
5.6.15	0.003	0.077	18.15
5.6.14	0.013	0.077	18.15
5.6.13	0.000	0.047	18.20
5.6.12	0.000	0.093	21.14
5.6.11	0.007	0.087	21.01
5.6.10	0.007	0.083	21.04
5.6.9	0.007	0.063	20.98
5.6.8	0.007	0.067	20.44
5.5.31	0.027	0.043	20.34
5.5.30	0.013	0.037	18.02
5.5.29	0.007	0.053	17.92
5.5.28	0.013	0.077	20.90
5.5.27	0.007	0.070	20.79
5.5.26	0.007	0.080	20.79
5.5.25	0.007	0.077	20.69
5.5.24	0.023	0.037	20.27

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