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<?php

namespace Bench;

/**
 * 1. ZEND_IS_BOOL 命令にコンパイルされる (最速期待)
 */
function is_bool_native(mixed $v): bool { return \is_bool($v); }

/**
 * 2. 名前空間解決による DO_FCALL。実行時にグローバル関数を探す
 */
function is_bool_ns(mixed $v): bool { return is_bool($v); }

/**
 * 3. ZEND_IN_ARRAY 命令にコンパイルされる (O(1) 最適化)
 */
function in_array_native(mixed $v): bool { return \in_array($v, [true, false], true); }

/**
 * 4. 名前空間解決 + DO_FCALL + 通常の線形探索 (O(n))
 */
function in_array_ns(mixed $v): bool { return in_array($v, [true, false], true); }

/**
 * 5. ユーザー定義ロジック：キャストと比較
 */
function is_bool_cast(mixed $v): bool { return $v === (bool)$v; }

/**
 * 6. ユーザー定義ロジック：論理和
 */
function is_bool_or(mixed $v): bool { return $v === true || $v === false; }


/**
 *  7. match式
 */
function is_bool_match(mixed $v): bool {
    return match ($v) {
        true, false => true,
        default => false,
    };
}

/**
 * データセット
 */
$datasets = [
    'all_bool'    => [true, false, true, false],
    'no_bool'     => [1, 0, "1", "0", "true", [], new \stdClass(), null],
    'half_half'   => [true, 1, false, "test", true, null, false, []],
];

$testcases = [
    'is_bool (\native)'  => is_bool_native(...),
    'is_bool (ns)'       => is_bool_ns(...),
    'in_array (\native)' => in_array_native(...),
    'in_array (ns)'      => in_array_ns(...),
    'is_bool_cast'       => is_bool_cast(...),
    'logical OR'         => is_bool_or(...),
    'match_expression'   => is_bool_match(...),
];

$iterations = 100000;

echo "PHP Version: " . PHP_VERSION . "\n";
echo str_repeat('=', 60) . "\n";

foreach ($datasets as $data_name => $values) {
    echo "\nDataset: $data_name\n";
    echo str_repeat('-', 60) . "\n";
    
    $results = [];
    foreach ($testcases as $name => $test) {
        $start = hrtime(true);
        for ($i = 0; $i < $iterations; $i++) {
            foreach ($values as $value) {
                $test($value);
            }
        }
        $end = hrtime(true);
        // 合計実行回数で割って平均を出すのではなく、あえて「このデータセット一式の処理時間」とする
        $results[$name] = ($end - $start) / 1e+6;
    }

    asort($results);
    foreach ($results as $name => $ms) {
        printf("%-20s : %10.4f ms\n", $name, $ms);
    }
}

Output for git.master_jit: PHP Version: 8.6.0-dev ============================================================ Dataset: all_bool ------------------------------------------------------------ match_expression : 10.2944 ms logical OR : 16.0196 ms is_bool_cast : 21.0079 ms is_bool (\native) : 22.8886 ms in_array (\native) : 28.2440 ms in_array (ns) : 30.2819 ms is_bool (ns) : 30.9460 ms Dataset: no_bool ------------------------------------------------------------ is_bool (\native) : 16.8444 ms is_bool_cast : 19.6260 ms logical OR : 20.8472 ms in_array (\native) : 21.7079 ms match_expression : 22.0952 ms is_bool (ns) : 23.6228 ms in_array (ns) : 23.7126 ms Dataset: half_half ------------------------------------------------------------ is_bool (\native) : 16.9744 ms is_bool_cast : 19.3227 ms match_expression : 20.2042 ms logical OR : 20.3736 ms in_array (ns) : 24.1670 ms is_bool (ns) : 24.3117 ms in_array (\native) : 25.4683 ms
Output for git.master: PHP Version: 8.6.0-dev ============================================================ Dataset: all_bool ------------------------------------------------------------ is_bool_cast : 9.6891 ms match_expression : 9.9284 ms logical OR : 9.9347 ms in_array (ns) : 19.6511 ms is_bool (\native) : 23.0480 ms in_array (\native) : 26.0762 ms is_bool (ns) : 30.4578 ms Dataset: no_bool ------------------------------------------------------------ is_bool (\native) : 16.5884 ms is_bool_cast : 19.5895 ms logical OR : 19.8684 ms in_array (\native) : 21.5842 ms match_expression : 22.1797 ms in_array (ns) : 23.5397 ms is_bool (ns) : 23.8009 ms Dataset: half_half ------------------------------------------------------------ is_bool (\native) : 16.8493 ms is_bool_cast : 19.4046 ms logical OR : 20.2830 ms match_expression : 20.8154 ms in_array (\native) : 21.6090 ms in_array (ns) : 23.2462 ms is_bool (ns) : 23.6496 ms

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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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