Online PHP editor | rfc for ri89S

@ 2024-03-28T04:26:52Z

<?php

function generate($array) {  // 1 loop over data
    foreach ($array as $v) {
        yield 'key' . $v => 'value' . $v;
    }
}

function generator($array) {  // 1 parent loop over data
    return iterator_to_array(generate($array));
}

function construct($array) {  // 1 loop over data
    $result = [];
    foreach ($array as $v) {
        $result['key' . $v] = 'value' . $v;
    }
    return $result;
}

function substrReplaceCombine($array) {
    return array_combine(
        substr_replace($array, 'key', 0, 0),
        substr_replace($array, 'value', 0, 0)
    );
}

function mapCombine($array) {  // 3 loops over data
    return array_combine(
               array_map(
                   fn($v) => 'key' . $v,
                   $array
               ),
               array_map(
                   fn($v) => 'value' . $v,
                   $array
               ),
           );
}

function mapFlatten($array) {  // 3 loops over data
    return array_merge(
               ...array_map(
                   fn($v) => ['key' . $v => 'value' . $v],
                   $array
               ),
           );
}

function mapUncolumn($array) {  // 2 loops over data
    return array_column(
               array_map(
                   fn($v) => ['key' . $v, 'value' . $v],
                   $array
               ),
               1,
               0
           );
}

function walk($array) {  // 1 loop over data
    $result = [];
    array_walk(
        $array,
        function($v) use (&$result) {
            $result['key' . $v] = 'value' . $v;
        }
    );
    return $result;
}

function reduce($array) {  // 1 loop over data
    return array_reduce(
               $array,
               function($result, $v) {
                   $result['key' . $v] = 'value' . $v;
                   return $result;
               },
               new ArrayObject()
           );
}

function returnTime(callable $function, int $repeat = 20)
{
    $tests = [];
    for ($i = 0; $i < $repeat; ++$i) {
        $startTime = microtime(true);
        $function();
        $endTime = microtime(true);
        $tests[] = $endTime - $startTime;
    }
    // Representing the average
    return 1000 * array_sum($tests) / $repeat;
}

$array = range(0, 5000);

foreach (['generator', 'construct', 'substrReplaceCombine', 'mapCombine', 'mapFlatten', 'mapUncolumn', 'walk', 'reduce'] as $test) {
    echo "Duration of $test: ", returnTime(fn() => $test($array)) . PHP_EOL;
}

Output for git.master_jit: Duration of generator: 0.93539953231812 Duration of construct: 0.69663524627686 Duration of substrReplaceCombine: 0.73616504669189 Duration of mapCombine: 0.94695091247559 Duration of mapFlatten: 1.1117935180664 Duration of mapUncolumn: 1.1517643928528 Duration of walk: 1.1464715003967 Duration of reduce: 0.92320442199707
Output for git.master: Duration of generator: 0.98052024841309 Duration of construct: 0.69215297698975 Duration of substrReplaceCombine: 0.74890851974487 Duration of mapCombine: 0.93257427215576 Duration of mapFlatten: 1.14825963974 Duration of mapUncolumn: 1.142156124115 Duration of walk: 1.1546969413757 Duration of reduce: 0.95226764678955
Output for rfc.property-hooks: Duration of generator: 1.4171838760376 Duration of construct: 0.72499513626099 Duration of substrReplaceCombine: 0.85246562957764 Duration of mapCombine: 1.0023713111877 Duration of mapFlatten: 1.2841463088989 Duration of mapUncolumn: 1.1592626571655 Duration of walk: 1.1334538459778 Duration of reduce: 0.91099739074707

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2022-12-01 RFC: Property hooks - included in PHP 8.4
2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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