3v4l.org

run code in 300+ PHP versions simultaneously
<?php function get_next_colid(string $id): string { if ($id === '') { return "\0"; } $chrs = str_split($id); $bytes = array_map(fn(string $chr): int => ord($chr), $chrs); $last = array_pop($bytes); $last++; $bytes[] = $last; $reveresed = array_reverse($bytes); foreach($reveresed as $pos => $val) { if ($val > 255) { $reveresed[$pos] = 255; if (isset($reveresed[$pos+1])) { $reveresed[$pos+1] += ($val - 255); } else { $reveresed[$pos+1] = ($val - 255); } } } $bytes = array_reverse($reveresed); $chrs = array_map(fn(int $byte): string => chr($byte), $bytes); return join('', $chrs); } $s = '~'; for($i = 0; $i <= 1000; $i++) { $s = get_next_colid($s); } var_dump($s);

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)
8.5.30.0140.00620.16
8.5.20.0060.01420.18
8.5.10.0090.00920.27
8.5.00.0160.00920.17
8.4.180.0140.00919.63
8.4.170.0130.01022.15
8.4.160.0120.01123.96
8.4.150.0090.00516.87
8.4.140.0120.01117.62
8.4.130.0120.00917.86
8.4.120.0130.00822.18
8.4.110.0130.00920.50
8.4.100.0140.00817.83
8.4.90.0060.00320.68
8.4.80.0020.00720.56
8.4.70.0100.01118.84
8.4.60.0110.01120.80
8.4.50.0090.00418.75
8.4.40.0060.00319.48
8.4.30.0060.01518.52
8.4.20.0100.01019.56
8.4.10.0070.00320.73
8.3.300.0100.01319.32
8.3.290.0130.00820.89
8.3.280.0100.01118.35
8.3.270.0100.01116.52
8.3.260.0070.00616.53
8.3.250.0100.01018.86
8.3.240.0120.00816.79
8.3.230.0100.00916.66
8.3.220.0130.00720.86
8.3.210.0130.00816.50
8.3.200.0030.00616.84
8.3.190.0070.00819.06
8.3.180.0090.01118.92
8.3.170.0100.01017.13
8.3.160.0100.00716.70
8.3.150.0080.01216.54
8.3.140.0080.00016.54
8.3.130.0130.01018.50
8.3.120.0220.00019.24
8.3.110.0070.01016.53
8.3.100.0070.00318.32
8.3.90.0050.00326.77
8.3.80.0040.00716.50
8.3.70.0100.01316.75
8.3.60.0100.01318.55
8.3.50.0000.01520.14
8.3.40.0130.00719.17
8.3.30.0090.00619.47
8.3.20.0080.00024.18
8.3.10.0060.00324.66
8.3.00.0000.01126.16
8.2.300.0150.00817.92
8.2.290.0110.00717.38
8.2.280.0120.00920.05
8.2.270.0070.00416.62
8.2.260.0100.01017.00
8.2.250.0110.00016.72
8.2.240.0100.00716.66
8.2.230.0070.00320.94
8.2.220.0030.00724.06
8.2.210.0030.00626.77
8.2.200.0100.00016.75
8.2.190.0060.01316.58
8.2.180.0140.01025.92
8.2.170.0100.00618.88
8.2.160.0080.00822.96
8.2.150.0030.00525.66
8.2.140.0040.00424.66
8.2.130.0040.00426.16
8.2.120.0030.00526.16
8.2.110.0070.00322.16
8.2.100.0050.00917.91
8.2.90.0030.00620.07
8.2.80.0000.00917.97
8.2.70.0030.00617.49
8.2.60.0060.00317.63
8.2.50.0030.00617.98
8.2.40.0000.00818.34
8.2.30.0000.00818.38
8.2.20.0040.00420.50
8.2.10.0030.00518.03
8.2.00.0000.00819.23
8.1.340.0120.00819.35
8.1.330.0140.00616.14
8.1.320.0030.00620.04
8.1.310.0090.00916.99
8.1.300.0050.00516.36
8.1.290.0090.00030.84
8.1.280.0040.01125.92
8.1.270.0040.00423.99
8.1.260.0000.00826.35
8.1.250.0030.00628.09
8.1.240.0100.00022.06
8.1.230.0070.00421.04
8.1.220.0060.00317.74
8.1.210.0030.00618.77
8.1.200.0040.00817.22
8.1.190.0000.00917.23
8.1.180.0090.00018.10
8.1.170.0030.00617.62
8.1.160.0000.00918.80
8.1.150.0030.00618.61
8.1.140.0000.00917.41
8.1.130.0000.00818.90
8.1.120.0060.00317.49
8.1.110.0040.00417.34
8.1.100.0030.00517.39
8.1.90.0030.00617.49
8.1.80.0030.00617.34
8.1.70.0040.00417.36
8.1.60.0030.00617.54
8.1.50.0000.00917.42
8.1.40.0000.00817.55
8.1.30.0070.00417.61
8.1.20.0070.00417.58
8.1.10.0000.01317.54
8.1.00.0040.00817.43
8.0.300.0040.00419.63
8.0.290.0040.00416.75
8.0.280.0000.00818.41
8.0.270.0040.00416.88
8.0.260.0040.00418.40
8.0.250.0000.00916.96
8.0.240.0030.00516.91
8.0.230.0040.00416.95
8.0.220.0050.00316.91
8.0.210.0040.00416.77
8.0.200.0000.00916.91
8.0.190.0000.00816.95
8.0.180.0060.00316.91
8.0.170.0000.01116.96
8.0.160.0030.00716.84
8.0.150.0000.01216.79
8.0.140.0060.00616.80
8.0.130.0030.00716.74
8.0.120.0030.00816.92
8.0.110.0080.00416.92
8.0.100.0060.00616.86
8.0.90.0030.00716.80
8.0.80.0030.00716.89
8.0.70.0070.00316.76
8.0.60.0040.00716.83
8.0.50.0000.01216.70
8.0.30.0030.00916.87
8.0.20.0060.00616.90
8.0.10.0090.00316.82
7.4.330.0050.00015.55
7.4.320.0000.00716.54
7.4.300.0050.00216.40
7.4.290.0050.00516.38
7.4.280.0000.01116.48
7.4.270.0080.00316.53
7.4.260.0060.00616.45
7.4.250.0070.00316.58
7.4.240.0030.00616.57
7.4.230.0060.00616.45
7.4.220.0030.00616.47
7.4.210.0080.00316.58
7.4.200.0080.00316.39
7.4.190.0060.00616.62
7.4.180.0000.01216.65
7.4.160.0000.01116.58
7.4.150.0030.00916.50
7.4.140.0040.00816.51
7.4.130.0090.00316.35
7.4.120.0100.00016.45
7.4.110.0000.01016.46
7.4.100.0060.00316.40
7.4.90.0030.00716.52
7.4.80.0000.01016.35
7.4.70.0060.00616.44
7.4.60.0060.00316.35
7.4.50.0040.00716.39
7.4.40.0030.00816.39
7.4.30.0040.00716.40
7.4.20.0100.00016.34
7.4.10.0060.00516.46
7.4.00.0070.00416.39

preferences:
44.48 ms | 1251 KiB | 5 Q