Online PHP editor | rfc for paaK1

@ 2024-01-15T05:22:31Z

<?php

$testList = [
    [
        'array' => [],
        'expect' => true,
    ],
    [
        'array' => ['a', 'b', 'c'],
        'expect' => true,
    ],
    [
        'array' => ["0" => 'a', "1" => 'b', "2" => 'c'],
        'expect' => true,
    ],
    [
        'array' => ["1" => 'a', "0" => 'b', "2" => 'c'],
        'expect' => false,
    ],
    [
        'array' => ["a" => 'a', "b" => 'b', "c" => 'c'],
        'expect' => false,
    ],
];


function displayBenchmark($function)
{
    global $testList;
    echo '<h5>use function <code>' . $function . '</code></h5>';

    $i = 0;
    $startTime = microtime(true);
    for ($i = 0; $i <= 1000; ++$i) {
        foreach ($testList as $testItem) {
            $result = $function($testItem['array']);
            assert($result === $testItem['expect'], 'Unexpect matched on index ' . $i);
            ++$i;
        }
    }
    $totalTime = microtime(true) - $startTime;
    echo 'total time: ' . var_export($totalTime, true) . '<br>';
}

function array_is_list1(array $arr)
{
    if ($arr === []) {
        return true;
    }
    return array_keys($arr) === range(0, count($arr) - 1);
}

function array_is_list2(array $array): bool
{
    $i = -1;
    foreach ($array as $k => $v) {
        ++$i;
        if ($k !== $i) {
            return false;
        }
    }
    return true;
}

class Benchmark
{
   private static $max, $memory;

   public static function memoryTick()
   {
      self::$memory = memory_get_usage() - self::$memory;
      self::$max    = self::$memory>self::$max?self::$memory:self::$max;
      self::$memory = memory_get_usage();
   }

   public static function benchmarkMemory(callable $function, $args=null)
   {
      declare(ticks=1);
      self::$memory = memory_get_usage();
      self::$max    = 0;

      register_tick_function('call_user_func_array', ['Benchmark', 'memoryTick'], []);
      $result = is_array($args)?
                call_user_func_array($function, $args):
                call_user_func($function);
      unregister_tick_function('call_user_func_array');
      return [
         'memory' => self::$max
      ];
   }
}

var_dump(Benchmark::benchmarkMemory('displayBenchmark', ['array_is_list']));
var_dump(Benchmark::benchmarkMemory('displayBenchmark', ['array_is_list1']));
var_dump(Benchmark::benchmarkMemory('displayBenchmark', ['array_is_list2']));

Output for git.master_jit: <h5>use function <code>array_is_list</code></h5>total time: 7.987022399902344E-5<br>array(1) { ["memory"]=> int(280) } <h5>use function <code>array_is_list1</code></h5>total time: 0.0002980232238769531<br>array(1) { ["memory"]=> int(192) } <h5>use function <code>array_is_list2</code></h5>total time: 0.00010204315185546875<br>array(1) { ["memory"]=> int(192) }
Output for git.master: <h5>use function <code>array_is_list</code></h5>total time: 9.107589721679688E-5<br>array(1) { ["memory"]=> int(280) } <h5>use function <code>array_is_list1</code></h5>total time: 0.00015306472778320312<br>array(1) { ["memory"]=> int(192) } <h5>use function <code>array_is_list2</code></h5>total time: 0.0001270771026611328<br>array(1) { ["memory"]=> int(192) }
Output for rfc.property-hooks: <h5>use function <code>array_is_list</code></h5>total time: 7.796287536621094E-5<br>array(1) { ["memory"]=> int(280) } <h5>use function <code>array_is_list1</code></h5>total time: 0.00013494491577148438<br>array(1) { ["memory"]=> int(192) } <h5>use function <code>array_is_list2</code></h5>total time: 0.00013494491577148438<br>array(1) { ["memory"]=> int(192) }

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2020-03-21 RFC: Is_Literal - declined
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2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
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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
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