Online PHP editor | perf for GM147

<?php /** * Run it: php r30.php * Run it with a custom number of rows: php r30.php <number> * Have fun :) */ function createRows($numRows, $rule) { $getNextRow = function ($currRow) use ($rule) { $nextRow = [0, 0]; for ($i = 1, $iMax = count($currRow) - 1; $i < $iMax; $i++) { $nextRow[] = $rule[$currRow[$i - 1] . $currRow[$i] . $currRow[$i + 1]]; } array_push($nextRow, 0, 0); return $nextRow; }; $rows[0] = [0, 0, 1, 0, 0]; for ($i = 1; $i <= $numRows; $i++) { $rows[$i] = $getNextRow($rows[$i - 1]); } return $rows; } function displayRows($rows, $isDownwards, $micSleep) { $rowCount = count($rows); $getRow = function ($rows, $isDownwards) use ($rowCount) { if ($isDownwards === true) { for ($i = 0; $i < $rowCount; $i++) { yield [$i, $rows[$i]]; } } else { for ($i = $rowCount - 1; $i >= 0; $i--) { yield [$i, $rows[$i]]; } } } foreach ($getRow($rows, $isDownwards) as [$pad, $row]) { echo str_repeat(' ', $rowCount - $pad); foreach ($row as $cell) { echo $cell === 1 ? '█' : ' '; } echo PHP_EOL; usleep($micSleep); } } // https://en.wikipedia.org/wiki/Rule_30 const RULE_30 = [ '111' => 0, '110' => 0, '101' => 0, '100' => 1, '011' => 1, '010' => 1, '001' => 1, '000' => 0, ]; $numRows = isset($argv[1]) && (int)$argv[1] > 0 && (int)$argv[1] <= 1000 ? (int)$argv[1] : 80; $rows = createRows($numRows, RULE_30); while (true) { displayRows($rows, true, 5000); displayRows($rows, false, 5000); }

Version	System time (s)	User time (s)	Memory (MiB)
7.1.7	0.007	0.009	17.04
7.1.6	0.027	0.009	35.14
7.1.5	0.035	0.006	34.41
7.1.4	0.019	0.013	34.45
7.1.3	0.020	0.016	34.31
7.1.2	0.027	0.011	34.58
7.1.1	0.014	0.006	16.48
7.1.0	0.009	0.012	16.43
7.0.20	0.007	0.007	16.67
7.0.19	0.009	0.010	16.42
7.0.18	0.006	0.011	16.02
7.0.17	0.006	0.012	16.09
7.0.16	0.006	0.014	16.04
7.0.15	0.000	0.017	15.99
7.0.14	0.010	0.010	15.91
7.0.13	0.006	0.014	16.39
7.0.12	0.006	0.013	16.53
7.0.11	0.004	0.015	15.89
7.0.10	0.003	0.016	16.08
7.0.9	0.003	0.017	16.01
7.0.8	0.011	0.009	16.09
7.0.7	0.008	0.012	16.15
7.0.6	0.019	0.000	16.06
7.0.5	0.006	0.015	16.41
7.0.4	0.010	0.012	16.20
7.0.3	0.006	0.014	16.37
7.0.2	0.006	0.011	16.20
7.0.1	0.015	0.004	16.22
7.0.0	0.014	0.003	16.33