Online PHP editor | rfc for jfHCR

@ 2024-03-28T02:37:43Z

<?php

function generator($array, $prefix) {
    foreach ($array as $k => $v) {
        yield $prefix . $k => $v;
    }
}

function generatorPrefix($array, $prefix = 'prefix') {
    return iterator_to_array(generator($array, $prefix));
}

function constructPrefix($array, $prefix = 'prefix') {  // 1 loop over data
    $result = [];
    foreach ($array as $k => $v) {
        $result[$prefix . $k] = $v;
    }
    return $result;
}

function mapKeyAndCombinePrefix($array, $prefix = 'prefix') {  // 3 loops over data
    return array_combine(
               array_map(
                   fn($k) => $prefix . $k,
                   array_keys($array)
               ),
               $array
           );
}

function substrReplaceAndCombinePrefix($array, $prefix = 'prefix') {  // 3 loops over data
    return array_combine(
               substr_replace(array_keys($array), $prefix, 0, 0),
               $array
           );
}

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

function reducePrefix($array, $prefix = 'prefix') {  // 2 loops over data
    return array_reduce(
               array_keys($array),
               function($result, $k) use ($array, $prefix) {
                   $result[$prefix . $k] = $array[$k];
                   return $result;
               },
               []
           );
}

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, 2000);

foreach (['substrReplaceAndCombinePrefix', 'constructPrefix', 'mapKeyAndCombinePrefix', 'generatorPrefix', 'walkPrefix', 'reducePrefix'] as $test) {
    echo "Duration of $test: ", returnTime(fn() => $test($array)) . PHP_EOL;
}

Output for git.master_jit: Duration of substrReplaceAndCombinePrefix: 0.18355846405029 Duration of constructPrefix: 0.17215013504028 Duration of mapKeyAndCombinePrefix: 0.23632049560547 Duration of generatorPrefix: 0.25166273117065 Duration of walkPrefix: 0.32198429107666 Duration of reducePrefix: 11.581778526306
Output for git.master: Duration of substrReplaceAndCombinePrefix: 0.16965866088867 Duration of constructPrefix: 0.1738429069519 Duration of mapKeyAndCombinePrefix: 0.22979974746704 Duration of generatorPrefix: 0.25275945663452 Duration of walkPrefix: 0.3203272819519 Duration of reducePrefix: 11.507129669189
Output for rfc.property-hooks: Duration of substrReplaceAndCombinePrefix: 0.18290281295776 Duration of constructPrefix: 0.17499923706055 Duration of mapKeyAndCombinePrefix: 0.22473335266113 Duration of generatorPrefix: 0.24400949478149 Duration of walkPrefix: 0.31160116195679 Duration of reducePrefix: 11.333823204041

This tab shows result from various feature-branches currently under review by the php developers. Contact me to have additional branches featured.

Active branches

Archived branches

Once feature-branches are merged or declined, they are no longer available. Their functionality (when merged) can be viewed from the main output page

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

preferences:dark modelive previewkey bindings