PHP code example of drupol / memoize

1. Go to this page and download the library: Download drupol/memoize library. Choose the download type require.

2. Extract the ZIP file and open the index.php.

3. Add this code to the index.php.

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

drupol / memoize example snippets




declare(strict_types=1);

namespace App;

Memoizer;

$fibonacci = static function (int $number) use (&$fibonacci): int {
    return (1 >= $number) ?
        $number :
        $fibonacci($number - 1) + $fibonacci($number - 2);
};

$fibonacciMemoized = static function (int $number) use (&$fibonacciMemoized): int {
    return (1 >= $number) ?
        $number :
        $fibonacciMemoized($number - 1) + $fibonacciMemoized($number - 2);
};
$fibonacciMemoized = Memoizer::fromClosure($fibonacciMemoized);

function bench(Closure $closure, ...$arguments): array
{
    $eval = static function (Closure $closure, ...$arguments): Generator {
        yield microtime(true);
        yield $closure(...$arguments);
        yield microtime(true);
    };

    $result = iterator_to_array($eval($closure, ...$arguments));

    return [
        $result[1],
        $result[2] - $result[0],
    ];
}

var_dump(sprintf('[return: %s] [duration: %s]', ...bench($fibonacci, 30))); // ~3 seconds
var_dump(sprintf('[return: %s] [duration: %s]', ...bench($fibonacciMemoized, 30))); // ~0.0003 seconds