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@ 2025-11-11T11:36:49Z

<?php

function benchmark(callable ...$functions): void
{
    $times = array_combine(array_keys($functions), array_fill(0, count($functions), 0.0));
    $baseTime = 0.0;
    $baseCallable = fn() => null;
    $start = hrtime(true);
    $count = 0;

    while (hrtime(true) < $start + 1e9) {
        $startCall = hrtime(true);
        $baseCallable();
        $baseTime += hrtime(true) - $startCall;

        foreach ($functions as $key => $function) {
            $startCall = hrtime(true);
            $function();
            $times[$key] += hrtime(true) - $startCall;
        }
        $count++;
    }

    foreach ($times as $key => $time) {
        $times[$key] = $time - $baseTime;
    }

    if ($count < 100) {
        echo "Methods too low. Iterated only {$count} times\n";
    }

    asort($times);

    echo "Benchmark results after {$count} iterations in nanoseconds:\n";
    foreach ($times as $key => $time) {
        echo $key . ': ' . $time . "\n";
    }
}

enum OptionEnum: string
{
    case Option1 = 'opt1';
    case Option2 = 'opt2';
    case Option3 = 'opt3';
    case Option4 = 'opt4';
    case Option5 = 'opt5';

    public static function values(): array
    {
        return ['opt1', 'opt2', 'opt3', 'opt4', 'opt5'];
    }

    public static function valuesArrayMap(): array
    {
        return array_map(static fn(self $c) => $c->value, self::cases());
    }

    public static function valuesArrayColumn(): array
    {
        return array_column(self::cases(), 'value');
    }
}

benchmark(
    arrayRaw: fn() => OptionEnum::values(),
    arrayMap: fn() => OptionEnum::valuesArrayMap(),
    arrayCol: fn() => OptionEnum::valuesArrayColumn(),
);

Output for git.master_jit: Benchmark results after 1177549 iterations in nanoseconds: arrayRaw: 10983186 arrayCol: 162673721 arrayMap: 326444981
Output for git.master: Benchmark results after 1171213 iterations in nanoseconds: arrayRaw: 10801054 arrayCol: 162088255 arrayMap: 332194832

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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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