Online PHP editor | perf for cP7IT

<?php $rows = [ ['`1234567890-=', '~!@#$%^&*()_+'], ['qwertyuiop[]\\', 'QWERTYUIOP{}|'], ['asdfghjkl;\'', 'ASDFGHJKL:"'], ['zxcvbnm,./', 'ZXCVBNM<>?'] ]; $wholeregex = []; foreach($rows as $k => $row) { $num = $k + 1; echo "Row $num\n"; $array = []; foreach($row as $subrow) { $subarray = array_map('ord', str_split($subrow)); $array = array_merge($subarray, $array); } sort($array); echo "\t" . implode( ' ', $array), "\n"; $ret = [$array[0]]; for($i = 1; $i < count($array); $i++) { $num = $array[$i]; if(($array[$i - 1] + 1) == $num) { if( ($i == (count($array) - 1)) || ($array[$i + 1] != ($num + 1)) ) { $ret[] = array_pop($ret) . '-' . $num; } } else { $ret[] = $num; } } echo "\t" . implode( ' ', $ret), "\n"; $regex = '(['; $subregex = implode( '', array_map(function($el) { $vals = explode('-', $el); if(count($vals) == 1) { return chr($vals[0]); } return chr($vals[0]) . '-' . chr($vals[1]); }, $ret)); $regex .= $subregex; $regex .= '])'; echo "\t" . $regex, "\n"; $wholeregex[] = $regex; } $finalregex = '%' . implode('|', $wholeregex) . '%'; $finalregex = str_replace('(-', '\(-', $finalregex); echo $finalregex, "\n"; echo strlen($finalregex), "\n"; $argv[1] = "a"; $i=$argv[1];preg_match("%([!#-&\(-+-0-9=@^-`~])|([EIO-RT-UWY[-]eio-rt-uwy{-}])|(["':-;ADF-HJ-LSadf-hj-ls])|([,.-/<>-?B-CM-NVXZb-cm-nvxz])%",$i,$m);echo array_flip($m)[$i];

Version	System time (s)	User time (s)	Memory (MiB)
7.0.2	0.027	0.083	20.24
7.0.1	0.007	0.067	20.33
7.0.0	0.000	0.057	20.20
5.6.17	0.023	0.033	20.47
5.6.16	0.010	0.040	20.43
5.6.15	0.010	0.073	18.13
5.6.14	0.003	0.050	18.24
5.6.13	0.013	0.057	18.21
5.6.12	0.013	0.077	21.06
5.6.11	0.000	0.047	21.03
5.6.10	0.010	0.080	21.15
5.6.9	0.000	0.093	21.14
5.6.8	0.013	0.040	20.52
5.5.31	0.027	0.053	20.25
5.5.30	0.003	0.080	18.08
5.5.29	0.007	0.060	18.09
5.5.28	0.010	0.077	20.98
5.5.27	0.007	0.047	20.78
5.5.26	0.007	0.077	20.96
5.5.25	0.013	0.040	20.63
5.5.24	0.027	0.050	20.14