Online PHP editor | refs for FY4re

<?php interface I {} class A implements I{} $results = []; [$key, $value] = compute('instanceof [object]', function($instance) { $instance instanceof I; }); $results[$key] = $value; [$key, $value] = compute('is_subclass_of [object]', function($instance) { is_subclass_of($instance, I::class); }); $results[$key] = $value; [$key, $value] = compute('is_subclass_of [class]', function($instance) { is_subclass_of(A::class, I::class); }); $results[$key] = $value; [$key, $value] = compute('class_implements [object]', function($instance) { in_array(I::class, class_implements(A::class)); }); $results[$key] = $value; [$key, $value] = compute('is_a [object]', function($instance) { is_a($instance, I::class); }); $results[$key] = $value; [$key, $value] = compute('is_a [class]', function($instance) { is_a(A::class, I::class, true); }); $results[$key] = $value; [$key, $value] = compute('reflection [class]', function($instance) { ( new ReflectionClass(A::class))->implementsInterface(I::class); }); $results[$key] = $value; function compute($name, $callback) { $instance = new A; $start = microtime(true); for($i = 1e5; $i; $i--) { $callback($instance); } $elapsedMs = (microtime(true) - $start)*1000; return [$name, $elapsedMs]; } asort($results); $best = min($results); $results = array_map(function($result) use($best) { return [ $result, $result / $best, ]; }, $results); $performance = 0; foreach($results as $name => $result) { [$elapsedMs, $performance] = $result; $extraTimeInPercent = ($performance - 1) * 100; echo sprintf( '%25s took %6.2f ms | +%3.0f%% | %s', $name, $elapsedMs, $extraTimeInPercent, str_pad('', ($performance * 10), '.') ) . PHP_EOL; }