Online PHP editor | perf for IfpNO

@ 2023-06-08T17:42:51Z

<?php

class Immutable {
    public function __construct(/** @psalm-readonly */ public stdClass $neverChange) {}
	public function mutate(): void { $this->neverChange->foo = 1; }
}

class DoOtherStuff {
    public function doStuff(Immutable $immutable): void { $immutable->mutate(); }
}

$data = new stdClass;
$data->foo = 0;

$immutable = new Immutable($data);

/* ... */
if ($immutable->neverChange->foo === 0) {
    /* ... */
    (new DoOtherStuff())->doStuff($immutable);
	
    /* Here I would assume, that my immutable object still holds the not change value stdClass::foo = 0
       but it got mutated to stdClass::foo = 1
    */
}

echo "Does this code actually run without any syntax errors? " . ($immutable->neverChange->foo ? 'Me definetly think so...' : 'No, some internet rando was smarter than me rapid typing some example which everybody did understand anyways');

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)
8.3.13	0.006	0.003	18.44
8.3.12	0.016	0.003	18.62
8.3.11	0.016	0.003	16.50
8.3.10	0.003	0.006	18.43
8.3.9	0.010	0.010	18.43
8.3.8	0.004	0.004	18.56
8.3.7	0.010	0.005	18.56
8.3.6	0.004	0.014	18.31
8.3.5	0.012	0.006	16.47
8.3.4	0.007	0.007	22.14
8.3.3	0.014	0.000	20.22
8.3.2	0.005	0.003	24.18
8.3.1	0.004	0.004	24.66
8.3.0	0.004	0.004	26.16
8.2.24	0.008	0.011	17.30
8.2.23	0.007	0.007	20.94
8.2.22	0.008	0.000	24.06
8.2.21	0.000	0.010	26.77
8.2.20	0.004	0.004	18.25
8.2.19	0.012	0.006	16.75
8.2.18	0.009	0.006	18.04
8.2.17	0.013	0.006	18.96
8.2.16	0.012	0.003	22.96
8.2.15	0.004	0.004	25.66
8.2.14	0.000	0.008	24.66
8.2.13	0.000	0.008	26.16
8.2.12	0.000	0.008	19.66
8.2.11	0.007	0.003	20.22
8.2.10	0.006	0.003	20.38
8.2.7	0.003	0.007	17.80
8.1.30	0.004	0.004	18.48
8.1.29	0.003	0.006	18.88
8.1.28	0.007	0.007	25.92
8.1.27	0.008	0.000	24.66
8.1.26	0.004	0.004	26.35
8.1.25	0.007	0.000	28.09
8.1.24	0.006	0.003	18.95
8.1.23	0.003	0.006	22.15

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