3v4l.org

run code in 500+ PHP versions simultaneously
<?php function lookAndSay(int $n): string { if ($n <= 1) return '1'; $r = $lastSeq = '1'; while($n-- > 0) $r .= ' '.($lastSeq = tokenize($lastSeq)); return $r; } function tokenize(string $str): string { $r = ''; $c = 1; for ($i = 0; $i < strlen($str); $i++) { if($str[$i] == ($str[$i + 1] ?? '')) { $c++; continue; } ($r .= $c.$str[$i]) && ($c = 1); } return $r; } echo lookAndSay(3);

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).

VersionSystem time (s)User time (s)Memory (MiB)
8.5.80.0110.00816.85
8.5.70.0120.00616.89
8.5.60.0110.00716.98
8.5.50.0080.00718.52
8.5.30.0150.00619.24
8.5.20.0130.00719.70
8.5.10.0110.00721.92
8.5.00.0110.01020.00
8.4.230.0040.00719.63
8.4.220.0050.00419.60
8.4.210.0140.00719.57
8.4.180.0090.01219.54
8.4.170.0100.01123.89
8.4.160.0140.00922.14
8.4.150.0080.00416.87
8.4.140.0150.00617.47
8.4.130.0030.00618.85
8.4.120.0110.00920.81
8.4.110.0070.01519.57
8.4.100.0110.00917.71
8.4.90.0050.00420.38
8.4.80.0060.00318.98
8.4.70.0060.00318.95
8.4.60.0110.00718.79
8.4.50.0120.00720.33
8.4.40.0100.00719.54
8.4.30.0030.00918.83
8.4.20.0080.00417.74
8.4.10.0100.00622.01
8.3.320.0120.00618.70
8.3.310.0050.00420.20
8.3.300.0180.00918.45
8.3.290.0140.01120.88
8.3.280.0120.00818.42
8.3.270.0130.00816.48
8.3.260.0080.01116.50
8.3.250.0150.00416.55
8.3.240.0040.00418.16
8.3.230.0090.01016.57
8.3.220.0120.00519.23
8.3.210.0110.00816.75
8.3.200.0060.00416.82
8.3.190.0060.00217.47
8.3.180.0080.01017.19
8.3.170.0070.01019.09
8.3.160.0080.01117.27
8.3.150.0140.00317.14
8.3.140.0100.00017.22
8.3.130.0000.00818.28
8.3.120.0070.01020.95
8.3.110.0090.00020.94
8.3.100.0030.00724.06
8.3.90.0040.00426.77
8.3.80.0060.00316.63
8.3.70.0130.00716.63
8.3.60.0070.00718.43
8.3.50.0100.00318.29
8.3.40.0040.01120.09
8.3.30.0040.01118.88
8.3.20.0040.00424.18
8.3.10.0080.00024.66
8.3.00.0110.00026.16
8.2.320.0110.00918.00
8.2.310.0110.00918.23
8.2.300.0130.00622.34
8.2.290.0080.01116.55
8.2.280.0090.00918.17
8.2.270.0000.01917.19
8.2.260.0090.00916.50
8.2.250.0090.01216.42
8.2.240.0060.00317.29
8.2.230.0000.00722.58
8.2.220.0030.00737.54
8.2.210.0100.00526.77
8.2.200.0090.00016.88
8.2.190.0070.00716.58
8.2.180.0180.00425.92
8.2.170.0120.00319.04
8.2.160.0100.00322.96
8.2.150.0000.00825.66
8.2.140.0040.00424.66
8.2.130.0080.00026.16
8.2.120.0070.00021.09
8.2.110.0090.00020.47
8.2.100.0070.00320.52
8.1.340.0100.00923.83
8.1.330.0150.00416.02
8.1.320.0130.00616.43
8.1.310.0030.01418.31
8.1.300.0130.00317.86
8.1.290.0030.00730.84
8.1.280.0180.00325.92
8.1.270.0060.00324.66
8.1.260.0040.00426.35
8.1.250.0080.00028.09
8.1.240.0080.00418.62
8.1.230.0100.00018.59
7.4.300.0070.00316.46

preferences:
76.74 ms | 889 KiB | 5 Q