Online PHP editor | perf for NLM69

@ 2025-11-13T02:30:36Z

<?php

class Expressions
{
    // Prerequisites for examples below
    public $a = 1;
    public static $b = 3;
    function bar() {}
    static function baz() {}

    function foo()
    {
        // Prerequisites for examples below
        $a = 1;
        $b = 2;
        $x = [1, 2];
        file_put_contents('/tmp/a.php', '');

        // Examples based on php-parser expression types
        // Using as few variables within the expressions themselves as the parser allows, to avoid false-positives
        static $arrowFunction = fn() => 1;
        static $assign = ($a = 1);
        static $assignOpAdd = ($a += 1);
        static $assignOpAnd = ($a &= 1);
        static $assignOpConcat = ($a .= "b");
        static $assignOpDiv = ($a /= 2);
        static $assignRef = ($a =& $b);
        static $castInt = (int)"1";
        static $clone = clone (new stdClass());
        static $closure = function () { return 1; };
        static $closureUse = function () use ($x) {};
        static $empty = empty(1);
        static $encapsed = "Value: $a";
        static $errorSuppress = @new stdClass();
        static $eval = eval('1+1;');
        static $funcCall = strlen('x');
        static $include = include '/tmp/a.php';
        static $instanceof = new stdClass() instanceof self;
        static $isset = isset($x);
        static $list = [[$a, $b] = [1, 2]];
        static $match = match (1) {1 => 'a', default => 'b'};
        static $methodCall = (new Expressions())->bar();
        static $nullsafeMethodCall = (new Expressions())?->bar();
        static $postInc = $a++;
        static $print = print '';
        static $shellExec = `whoami`; // expected warning due to sandbox environment
        static $staticCall = self::baz();
        static $staticPropertyFetch = self::$b;
        static $variable = $a;

        // These are invalid but give a different error
        static $nullsafePropertyFetch = (new Expressions())?->a;
        static $propertyFetch = (new Expressions())->a;
    }
}

$expr = new Expressions();
$expr->foo();

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)
8.5.1	0.011	0.006	16.94
8.5.0	0.012	0.009	22.76
8.4.16	0.013	0.009	25.02
8.4.15	0.012	0.001	17.00
8.4.14	0.037	0.007	17.64
8.4.13	0.038	0.007	17.55
8.4.12	0.038	0.008	18.00
8.4.11	0.038	0.008	17.84
8.4.10	0.035	0.014	18.05
8.4.9	0.040	0.011	17.61
8.4.8	0.035	0.010	18.01
8.4.7	0.033	0.013	17.47
8.4.6	0.040	0.011	17.75
8.4.5	0.042	0.009	17.68
8.4.4	0.039	0.010	17.75
8.4.3	0.041	0.007	17.39
8.4.2	0.041	0.006	17.44
8.4.1	0.039	0.008	17.46
8.3.29	0.011	0.010	20.69
8.3.28	0.013	0.008	20.54
8.3.27	0.035	0.009	16.73
8.3.26	0.038	0.007	16.59
8.3.25	0.031	0.012	16.81
8.3.24	0.036	0.007	16.67
8.3.23	0.035	0.008	16.66
8.3.22	0.037	0.007	16.91
8.3.21	0.039	0.005	16.68
8.3.20	0.034	0.009	16.75
8.3.19	0.037	0.008	16.54
8.3.18	0.037	0.008	16.71
8.3.17	0.039	0.009	16.47
8.3.16	0.038	0.010	16.92
8.3.15	0.038	0.010	16.85
8.3.14	0.034	0.012	16.82
8.3.13	0.031	0.011	16.73
8.3.12	0.030	0.011	16.64
8.3.11	0.033	0.009	16.47
8.3.10	0.037	0.010	16.79
8.3.9	0.039	0.012	16.78
8.3.8	0.039	0.009	17.00
8.3.7	0.036	0.009	16.49
8.3.6	0.038	0.008	16.82
8.3.5	0.035	0.011	16.76
8.3.4	0.036	0.009	17.83
8.3.3	0.028	0.009	17.59
8.3.2	0.027	0.009	17.72
8.3.1	0.030	0.007	17.70
8.3.0	0.031	0.008	17.32
8.2.30	0.011	0.012	20.05
8.2.29	0.026	0.010	16.39
8.2.28	0.030	0.007	16.78
8.2.27	0.031	0.007	16.64
8.2.26	0.031	0.008	16.26
8.2.25	0.029	0.010	16.42
8.2.24	0.029	0.008	16.75
8.2.23	0.032	0.009	15.90
8.2.22	0.030	0.009	16.38
8.2.21	0.032	0.010	16.69
8.2.20	0.026	0.008	16.59
8.2.19	0.029	0.011	16.40
8.2.18	0.031	0.007	16.55
8.2.17	0.033	0.006	17.44
8.2.16	0.030	0.008	17.57
8.2.15	0.032	0.008	17.24
8.2.14	0.028	0.010	17.27
8.2.13	0.031	0.009	17.44
8.2.12	0.034	0.007	17.50
8.2.11	0.032	0.006	17.22
8.2.10	0.034	0.007	17.11
8.2.9	0.027	0.011	17.36
8.2.8	0.030	0.008	17.19
8.2.7	0.030	0.011	17.17
8.2.6	0.030	0.007	17.35
8.2.5	0.028	0.009	17.16
8.2.4	0.031	0.008	17.27
8.2.3	0.030	0.009	17.21
8.2.2	0.028	0.009	17.00
8.2.1	0.024	0.012	17.22
8.2.0	0.029	0.009	17.02
8.1.34	0.013	0.009	17.54

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