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File Name : Iterator.php

<?php

/**
 * This file is part of CodeIgniter 4 framework.
 *
 * (c) CodeIgniter Foundation <admin@codeigniter.com>
 *
 * For the full copyright and license information, please view
 * the LICENSE file that was distributed with this source code.
 */

namespace CodeIgniter\Debug;

use Closure;

/**
 * Iterator for debugging.
 */
class Iterator
{
    /**
     * Stores the tests that we are to run.
     *
     * @var array
     */
    protected $tests = [];

/**
     * Stores the results of each of the tests.
     *
     * @var array
     */
    protected $results = [];

/**
     * Adds a test to run.
     *
     * Tests are simply closures that the user can define any sequence of
     * things to happen during the test.
     *
     * @param Closure(): mixed $closure
     *
     * @return $this
     */
    public function add(string $name, Closure $closure)
    {
        $name = strtolower($name);

$this->tests[$name] = $closure;

return $this;
    }

/**
     * Runs through all of the tests that have been added, recording
     * time to execute the desired number of iterations, and the approximate
     * memory usage used during those iterations.
     *
     * @return string|null
     */
    public function run(int $iterations = 1000, bool $output = true)
    {
        foreach ($this->tests as $name => $test) {
            // clear memory before start
            gc_collect_cycles();

$start    = microtime(true);
            $startMem = $maxMemory = memory_get_usage(true);

for ($i = 0; $i < $iterations; $i++) {
                $result    = $test();
                $maxMemory = max($maxMemory, memory_get_usage(true));

unset($result);
            }

$this->results[$name] = [
                'time'   => microtime(true) - $start,
                'memory' => $maxMemory - $startMem,
                'n'      => $iterations,
            ];
        }

if ($output) {
            return $this->getReport();
        }

return null;
    }

/**
     * Get results.
     */
    public function getReport(): string
    {
        if ($this->results === []) {
            return 'No results to display.';
        }

helper('number');

// Template
        $tpl = '<table>
			<thead>
				<tr>
					<td>Test</td>
					<td>Time</td>
					<td>Memory</td>
				</tr>
			</thead>
			<tbody>
				{rows}
			</tbody>
		</table>';

$rows = '';

foreach ($this->results as $name => $result) {
            $memory = number_to_size($result['memory'], 4);

$rows .= "<tr>
				<td>{$name}</td>
				<td>" . number_format($result['time'], 4) . "</td>
				<td>{$memory}</td>
			</tr>";
        }

$tpl = str_replace('{rows}', $rows, $tpl);

return $tpl . '<br/>';
    }
}

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	linkwbay/linkwbay	0755	2024-05-11 08:52:14
..	dir	-	linkwbay/linkwbay	0755	2024-05-11 08:52:16
Toolbar	dir	-	linkwbay/linkwbay	0755	2024-05-11 08:52:14
BaseExceptionHandler.php	text/x-php	8.06 KB	linkwbay/linkwbay	0644	2024-05-11 08:50:02
ExceptionHandler.php	text/x-php	4.62 KB	linkwbay/linkwbay	0644	2024-05-11 08:50:02
ExceptionHandlerInterface.php	text/x-php	679 B	linkwbay/linkwbay	0644	2024-05-11 08:50:02
Exceptions.php	text/x-php	20.08 KB	linkwbay/linkwbay	0644	2024-05-11 08:50:02
Iterator.php	text/x-php	2.76 KB	linkwbay/linkwbay	0644	2024-05-11 08:50:02
Timer.php	text/x-php	3.65 KB	linkwbay/linkwbay	0644	2024-05-11 08:50:02
Toolbar.php	text/x-php	17.89 KB	linkwbay/linkwbay	0644	2024-05-11 08:50:02

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