Online PHP editor | perf for 5e5uJ

<?php //$states = json_decode('[[[2,0,1],[1,1,0]],[[4,1],[3,0,1]]]'); $states = json_decode('[[[2,0,1],[1,1,0]],[[4,1,2],[3,0,1]],[[99,0],[99,0],[22,0],[33,1,2]]]'); $state = 0; $tape = array(1, 1, 1, 1, 0, 0, 0); if (substr(phpversion(), -5) == '-hhvm') { $updatesInternalPointer = true; $noticesPointerOnlyMutation = true; $rightEdgeBug = false; } elseif (substr(phpversion(), 0, 1) == 7) { $updatesInternalPointer = false; $noticesPointerOnlyMutation = true; $rightEdgeBug = false; } else { $updatesInternalPointer = true; $noticesPointerOnlyMutation = false; $rightEdgeBug = true; } if ($rightEdgeBug) $tape[] = 0; foreach ($tape as $k => &$v) { if (is_null($state)) break; @list ($v, $d, $state) = $states[$state][$v]; if ($d) { if (count($tape) - $k < ($rightEdgeBug ? 3 : 2)) $tape[] = 0; if (!$updatesInternalPointer) next($tape); } elseif ($k) { $lol = $tape; if ($noticesPointerOnlyMutation) { prev($tape); if ($updatesInternalPointer) prev($tape); } else { prev($lol); if ($updatesInternalPointer) prev($lol); $tape = $lol; } unset($lol); } else { array_unshift($tape, 0); if (!$updatesInternalPointer) { $lol = $tape; reset($tape); unset($lol); } } } unset($v); if ($rightEdgeBug) array_pop($tape); var_dump($tape);

Version	System time (s)	User time (s)	Memory (MiB)
7.2.6	0.011	0.003	16.73
7.2.0	0.010	0.010	19.30
7.1.10	0.003	0.007	18.35
7.1.7	0.004	0.004	17.23
7.1.6	0.006	0.006	17.37
7.1.5	0.070	0.010	32.71
7.1.4	0.017	0.013	32.52
7.1.3	0.067	0.007	32.50
7.1.2	0.057	0.013	32.70
7.1.1	0.050	0.007	14.63
7.1.0	0.037	0.010	14.54
7.0.20	0.000	0.010	16.52
7.0.19	0.050	0.010	14.61
7.0.18	0.003	0.010	14.32
7.0.17	0.057	0.013	14.38
7.0.16	0.043	0.010	14.32
7.0.15	0.057	0.003	14.35
7.0.14	0.043	0.013	14.30
7.0.13	0.037	0.007	14.67
7.0.12	0.023	0.017	14.68
7.0.11	0.040	0.013	14.56
7.0.10	0.037	0.013	14.61
7.0.9	0.023	0.010	14.21
7.0.8	0.037	0.013	14.65
7.0.7	0.033	0.007	14.44
7.0.6	0.003	0.013	14.14
7.0.5	0.023	0.013	14.54
7.0.4	0.030	0.010	14.62
7.0.3	0.030	0.007	14.61
7.0.2	0.003	0.010	14.41
7.0.1	0.033	0.007	14.45
7.0.0	0.027	0.010	14.67