Online PHP editor | perf for paaK1

<?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']));

Version	System time (s)	User time (s)	Memory (MiB)
8.3.11	0.009	0.012	18.42
8.3.1	0.007	0.014	21.88
8.3.0	0.011	0.007	18.84
8.2.14	0.007	0.018	20.47
8.2.13	0.003	0.017	20.53
8.2.12	0.009	0.006	18.82
8.2.11	0.013	0.009	19.28
8.2.10	0.008	0.008	19.05
8.2.9	0.003	0.013	19.00
8.2.8	0.010	0.006	18.95
8.2.7	0.009	0.009	18.88
8.2.6	0.010	0.013	18.74
8.2.5	0.014	0.007	18.64
8.2.4	0.019	0.000	18.89
8.2.3	0.006	0.009	18.68
8.2.2	0.003	0.006	18.69
8.2.1	0.013	0.007	18.78
8.2.0	0.009	0.000	18.53
8.1.27	0.015	0.004	22.19
8.1.26	0.013	0.006	22.12
8.1.25	0.010	0.010	22.02
8.1.24	0.009	0.000	18.75
8.1.23	0.009	0.009	18.62
8.1.22	0.009	0.006	18.82
8.1.21	0.010	0.006	18.55
8.1.20	0.007	0.014	18.81
8.1.19	0.014	0.007	18.80
8.1.18	0.013	0.009	18.51
8.1.17	0.007	0.010	18.52
8.1.16	0.003	0.006	18.60
8.1.15	0.004	0.012	18.49
8.1.14	0.009	0.006	18.51
8.1.13	0.009	0.000	18.72
8.1.12	0.008	0.004	18.53
8.1.11	0.006	0.003	18.54
8.1.10	0.006	0.003	18.57
8.1.9	0.009	0.000	18.66
8.1.8	0.009	0.000	18.58
8.1.7	0.000	0.008	18.47
8.1.6	0.003	0.006	18.73
8.1.5	0.006	0.003	18.63
8.1.4	0.008	0.000	18.75
8.1.3	0.009	0.000	18.87
8.1.2	0.003	0.006	18.69
8.1.1	0.003	0.006	18.61
8.1.0	0.008	0.000	18.57
7.4.33	0.017	0.002	17.30
7.2.16	0.018	0.009	22.96