3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = "abababas"; $d1 = []; $d2 = []; $l = 0; $r = -1; for ($i = 0, $n = strlen($str); $i < $n; $i++) { $k = ($i > $r ? 1 : min($d1[$l + $r - $i], $r - $i)); while ($i - $k >= 0 && $i + $k < $n && $str[$i - $k] == $str[$i + $k]) { $k++; } $d1[$i] = $k; if ($i + $k - 1 > $r) { $l = $i - $k + 1; $r = $i + $k - 1; } } $l = 0; $r = -1; for ($i = 0; $i < $n; $i++) { $k = ($i > $r ? 0 : min($d2[$l + $r - $i - 1], $r - $i)); while ($i - $k >= 0 && $i + $k + 1 < $n && $str[$i - $k] == $str[$i + $k + 1]) { $k++; } $d2[$i] = $k; if ($i + $k > $r) { $l = $i - $k + 1; $r = $i + $k; } } var_dump($d2);

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)
8.3.60.0070.00716.63
8.3.50.0120.00621.93
8.3.40.0070.01418.63
8.3.30.0110.00418.47
8.3.20.0030.00520.16
8.3.10.0070.00023.52
8.3.00.0080.00019.91
8.2.180.0060.00918.16
8.2.170.0080.00822.96
8.2.160.0140.00020.35
8.2.150.0040.00424.18
8.2.140.0050.00324.66
8.2.130.0060.00321.04
8.2.120.0090.00026.35
8.2.110.0030.00622.13
8.2.100.0090.00319.45
8.2.90.0060.00319.39
8.2.80.0040.00417.97
8.2.70.0090.00017.75
8.2.60.0090.00017.93
8.2.50.0030.00518.07
8.2.40.0030.00620.97
8.2.30.0070.00020.56
8.2.20.0000.00717.77
8.2.10.0030.00618.20
8.2.00.0080.00018.04
8.1.280.0000.01525.92
8.1.270.0080.00018.83
8.1.260.0000.00826.35
8.1.250.0040.00428.09
8.1.240.0070.00319.09
8.1.230.0110.00019.11
8.1.220.0080.00017.74
8.1.210.0050.00318.77
8.1.200.0060.00317.36
8.1.190.0030.00517.64
8.1.180.0040.00418.10
8.1.170.0030.00618.69
8.1.160.0000.00720.78
8.1.150.0040.00418.82
8.1.140.0040.00419.60
8.1.130.0000.00717.71
8.1.120.0040.00417.55
8.1.110.0030.00617.47
8.1.100.0000.00917.46
8.1.90.0030.00517.43
8.1.80.0030.00517.45
8.1.70.0030.00517.43
8.1.60.0030.00517.58
8.1.50.0080.00017.44
8.1.40.0050.00317.58
8.1.30.0040.00417.63
8.1.20.0030.00517.57
8.1.10.0000.00717.56
8.1.00.0000.00817.52
8.0.300.0040.00418.77
8.0.290.0070.00016.75
8.0.280.0040.00218.47
8.0.270.0070.00017.25
8.0.260.0040.00417.27
8.0.250.0030.00316.98
8.0.240.0000.00716.94
8.0.230.0030.00316.89
8.0.220.0030.00316.91
8.0.210.0000.00716.80
8.0.200.0020.00517.03
8.0.190.0070.00016.96
8.0.180.0030.00516.96
8.0.170.0070.00016.94
8.0.160.0000.00716.96
8.0.150.0000.00916.76
8.0.140.0060.00316.79
8.0.130.0080.00013.31
8.0.120.0040.00416.79
8.0.110.0040.00416.77
8.0.100.0070.00016.73
8.0.90.0000.00716.96
8.0.80.0060.00916.84
8.0.70.0000.00716.77
8.0.60.0040.00416.91
8.0.50.0070.00016.70
8.0.30.0070.01116.88
8.0.20.0130.00717.40
8.0.10.0040.00417.09
8.0.00.0120.00716.69
7.4.330.0050.00016.79
7.4.320.0040.00416.64
7.4.300.0000.00616.37
7.4.290.0080.00016.59
7.4.280.0030.00516.55
7.4.270.0000.00716.61
7.4.260.0000.00916.50
7.4.250.0040.00416.58
7.4.240.0060.00116.53
7.4.230.0080.00016.42
7.4.220.0060.01316.73
7.4.210.0160.00016.71
7.4.200.0030.00316.52
7.4.160.0060.00916.38
7.4.150.0140.01117.40
7.4.140.0150.00317.86
7.4.130.0160.00516.49
7.4.120.0100.00716.58
7.4.110.0060.01616.41
7.4.100.0090.00916.50
7.4.90.0090.01216.55
7.4.80.0090.01219.39
7.4.70.0130.01016.36
7.4.60.0090.00816.56
7.4.50.0120.00316.46
7.4.40.0140.00716.54
7.4.30.0100.00716.60
7.4.00.0070.00714.75
7.3.330.0060.00013.13
7.3.320.0000.00613.08
7.3.310.0070.00016.42
7.3.300.0070.00016.25
7.3.290.0050.01016.28
7.3.280.0100.00816.34
7.3.270.0200.00417.40
7.3.260.0090.01316.59
7.3.250.0130.00716.35
7.3.240.0110.00616.60
7.3.230.0180.00416.42
7.3.210.0100.00716.56
7.3.200.0000.01816.55
7.3.190.0130.00316.24
7.3.180.0070.01016.40
7.3.170.0160.00716.38
7.3.160.0160.00016.44
7.2.330.0080.01116.54
7.2.320.0070.01416.36
7.2.310.0060.01216.82
7.2.300.0090.01016.80
7.2.290.0070.01016.60
7.2.60.0070.00716.92
7.2.00.0070.00719.45
7.1.200.0050.00315.93
7.1.100.0040.01118.18
7.1.70.0000.00917.32
7.1.60.0030.01319.50
7.1.50.0060.01616.90
7.1.00.0000.08022.54
7.0.200.0000.01116.73
7.0.60.0030.07719.92
7.0.50.0170.07017.89
7.0.40.0070.04020.12
7.0.30.0130.04320.21
7.0.20.0400.05320.16
7.0.10.0170.07020.09
7.0.00.0100.07320.16
5.6.280.0000.05721.07
5.6.210.0130.07720.63
5.6.200.0200.03718.12
5.6.190.0030.04320.61
5.6.180.0530.06320.41
5.6.170.0230.08320.38
5.6.160.0000.04720.48
5.6.150.0100.07018.15
5.6.140.0030.05318.18
5.6.130.0030.04018.11
5.6.120.0070.04020.91
5.6.110.0030.04321.12
5.6.100.0070.08321.00
5.6.90.0170.07721.04
5.6.80.0000.06020.48
5.5.350.0030.08320.32
5.5.340.0100.07717.88
5.5.330.0070.04020.40
5.5.320.0030.05020.24
5.5.310.0230.05320.41
5.5.300.0030.07017.93
5.5.290.0130.06718.02
5.5.280.0030.09020.80
5.5.270.0000.06720.89
5.5.260.0030.09320.73
5.5.250.0000.09320.69
5.5.240.0200.07720.35

preferences:
58.72 ms | 401 KiB | 5 Q