Viewing file:  Iterator.php (2.72 KB) -rw-r--r--
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<?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.
*
* @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 $this->getReport();
}
return null;
}
/**
* Get results.
*/
public function getReport(): string
{
if (empty($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/>';
}
}
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