Online PHP editor | perf for cEoe4

@ 2018-03-30T11:42:51Z

<?php

class StackContainer {
    protected $stack;
    public function __construct( $stack_depth )
    {
        for( $stack_level = 0; $stack_level < $stack_depth; $stack_level++ )
            $this->stack[] = "Some\Namespace\To\Class$stack_level";
    }
}

foreach( [2, 4, 8, 12, 16] as $depth ) {
    $depth = 2**$depth;
    $mem_before = memory_get_usage();
    $instance = new StackContainer( $depth );
    $mem_usage_kb = ( memory_get_usage() - $mem_before ) >> 10; 
    unset( $instance );
    printf("%8d elements involved %8d kB\n", $depth, $mem_usage_kb);
}

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)
7.2.4	0.156	0.028	23.36
7.2.3	0.123	0.019	23.05
7.2.2	0.199	0.029	23.73
7.2.1	0.205	0.027	23.68
7.2.0	0.182	0.025	23.35
7.1.16	0.169	0.028	22.39
7.1.15	0.133	0.026	22.04
7.1.14	0.206	0.025	22.34
7.1.13	0.156	0.027	22.36
7.1.12	0.138	0.021	22.20
7.1.11	0.160	0.023	21.79
7.1.10	0.171	0.029	21.47
7.1.9	0.172	0.026	21.44
7.1.8	0.148	0.021	21.51
7.1.7	0.246	0.021	20.50
7.1.6	0.208	0.032	38.87
7.1.5	0.103	0.026	38.81
7.1.4	0.186	0.034	38.29
7.1.3	0.200	0.025	38.48
7.1.2	0.208	0.025	38.45
7.1.1	0.178	0.023	20.20
7.1.0	0.137	0.018	20.27

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