3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Palindrome { public static function isPalindrome($str) { $s = preg_replace('/^[^A-Za-z]/', '', $str); echo $s; throw new Exception('Not implemented'); } } // For testing purposes (do not submit uncommented): echo Palindrome::isPalindrome('Noel sees Leon.');

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)
8.3.70.0110.00718.43
8.3.60.0180.00416.88
8.3.50.0040.01522.05
8.3.40.0110.00419.09
8.3.30.0120.00418.91
8.3.20.0070.00720.34
8.3.10.0040.00423.66
8.3.00.0030.00519.79
8.2.190.0130.00316.75
8.2.180.0130.00317.00
8.2.170.0210.00022.96
8.2.160.0140.00320.33
8.2.150.0080.00024.18
8.2.140.0050.00324.66
8.2.130.0000.01119.30
8.2.120.0000.00826.35
8.2.110.0030.00620.53
8.2.100.0070.00417.93
8.2.90.0050.00319.05
8.2.80.0060.00317.97
8.2.70.0040.00417.85
8.2.60.0040.00417.89
8.2.50.0000.00918.07
8.2.40.0110.00019.41
8.2.30.0000.00820.64
8.2.20.0070.00017.77
8.2.10.0030.00618.16
8.2.00.0000.00718.00
8.1.280.0120.00625.92
8.1.270.0060.00322.24
8.1.260.0080.00028.09
8.1.250.0080.00028.09
8.1.240.0030.00623.97
8.1.230.0120.00319.15
8.1.220.0080.00017.78
8.1.210.0080.00018.77
8.1.200.0040.00417.60
8.1.190.0040.00417.70
8.1.180.0050.00218.10
8.1.170.0040.00418.78
8.1.160.0040.00420.73
8.1.150.0050.00218.90
8.1.140.0000.00819.64
8.1.130.0070.00017.73
8.1.120.0070.00017.67
8.1.110.0070.00017.60
8.1.100.0000.00717.63
8.1.90.0030.00517.48
8.1.80.0080.00017.64
8.1.70.0070.00017.52
8.1.60.0050.00217.68
8.1.50.0040.00417.68
8.1.40.0030.00517.56
8.1.30.0030.00517.85
8.1.20.0040.00417.78
8.1.10.0070.00017.75
8.1.00.0080.00017.61
8.0.300.0050.00218.77
8.0.290.0070.00016.88
8.0.280.0000.00818.38
8.0.270.0020.00517.11
8.0.260.0050.00317.19
8.0.250.0030.00317.18
8.0.240.0030.00317.15
8.0.230.0000.00717.13
8.0.220.0040.00417.05
8.0.210.0040.00417.00
8.0.200.0000.00616.94
8.0.190.0000.00817.05
8.0.180.0030.00516.94
8.0.170.0040.00417.05
8.0.160.0050.00317.07
8.0.150.0000.00717.01
8.0.140.0040.00416.91
8.0.130.0030.00313.56
8.0.120.0000.00816.97
8.0.110.0000.00717.10
8.0.100.0000.00717.16
8.0.90.0040.00417.13
8.0.80.0090.00617.07
8.0.70.0000.00817.11
8.0.60.0030.00517.08
8.0.50.0080.00017.16
8.0.30.0120.00817.39
8.0.20.0100.01017.45
8.0.10.0040.00417.22
8.0.00.0120.00517.08
7.4.330.0000.00516.72
7.4.320.0000.00616.82
7.4.300.0030.00316.61
7.4.290.0000.00716.71
7.4.280.0050.00516.69
7.4.270.0000.00716.73
7.4.260.0030.00316.67
7.4.250.0030.00516.73
7.4.240.0040.00416.61
7.4.230.0030.00316.79
7.4.220.0100.01016.80
7.4.210.0060.01216.75
7.4.200.0030.00316.84
7.4.160.0100.00716.86
7.4.150.0150.00917.40
7.4.140.0150.00817.86
7.4.130.0090.00816.77
7.4.120.0120.00516.75
7.4.110.0030.01516.79
7.4.100.0080.01216.64
7.4.90.0000.01816.55
7.4.80.0090.00919.39
7.4.70.0110.00616.68
7.4.60.0080.01216.75
7.4.50.0080.00816.64
7.4.40.0070.01016.63
7.4.30.0100.00616.81
7.4.00.0070.00315.21
7.3.330.0000.00613.46
7.3.320.0030.00313.50
7.3.310.0080.00016.50
7.3.300.0000.00716.55
7.3.290.0050.01016.47
7.3.280.0110.00716.49
7.3.270.0120.01217.40
7.3.260.0070.01016.64
7.3.250.0080.01116.62
7.3.240.0140.00416.54
7.3.230.0080.00816.75
7.3.210.0150.00016.68
7.3.200.0080.01116.46
7.3.190.0130.00416.91
7.3.180.0080.00816.87
7.3.170.0130.00716.77
7.3.160.0090.01216.75
7.2.330.0120.00616.82
7.2.320.0170.00016.79
7.2.310.0100.00716.88
7.2.300.0100.00716.89
7.2.290.0130.00416.77
7.2.60.0030.00816.91
7.2.00.0030.01319.49
7.1.200.0000.01315.61
7.1.100.0070.00718.32
7.1.70.0030.00917.29
7.1.60.0030.02019.50
7.1.50.0090.01317.23
7.1.00.0030.07722.45
7.0.200.0560.00614.67
7.0.100.0600.07020.01
7.0.90.0430.07719.87
7.0.80.0370.08319.88
7.0.70.0430.07719.90
7.0.60.0430.07720.04
7.0.50.0330.05020.28
7.0.40.0100.07720.05
7.0.30.0130.08020.10
7.0.20.0130.08020.08
7.0.10.0070.07720.13
7.0.00.0070.05320.10
5.6.280.0030.03020.93
5.6.250.0130.07320.48
5.6.240.0130.06020.75
5.6.230.0130.07320.61
5.6.220.0130.07720.46
5.6.210.0030.08020.63
5.6.200.0130.08021.09
5.6.190.0070.04321.11
5.6.180.0070.08021.11
5.6.170.0100.08021.01
5.6.160.0130.08020.95
5.6.150.0070.07020.94
5.6.140.0100.07721.17
5.6.130.0030.08321.01
5.6.120.0030.08720.97
5.6.110.0130.04721.09
5.6.100.0100.08721.16
5.6.90.0100.07721.03
5.6.80.0170.07320.41
5.6.70.0100.08320.40
5.6.60.0030.07320.31
5.6.50.0070.04720.45
5.6.40.0130.07320.41
5.6.30.0100.08320.38
5.6.20.0130.07320.39
5.6.10.0170.07020.40
5.6.00.0070.08320.43
5.5.380.0030.09020.34
5.5.370.0070.08020.37
5.5.360.0070.08320.46
5.5.350.0070.08020.43
5.5.340.0130.07320.91
5.5.330.0270.06320.79
5.5.320.0030.05720.91
5.5.310.0030.07020.80
5.5.300.0130.07320.89
5.5.290.0030.08720.81
5.5.280.0030.08320.93
5.5.270.0030.08720.70
5.5.260.0100.08720.86
5.5.250.0100.08020.71
5.5.240.0070.08020.03
5.5.230.0030.08020.11
5.5.220.0100.07720.20
5.5.210.0070.07320.28
5.5.200.0130.04020.16
5.5.190.0000.09020.16
5.5.180.0070.08020.27
5.5.160.0030.07720.26
5.5.150.0030.08720.13
5.5.140.0070.08020.24
5.5.130.0100.07320.11
5.5.120.0070.04720.23
5.5.110.0070.04320.12
5.5.100.0070.08320.13
5.5.90.0130.07020.10
5.5.80.0000.08020.11
5.5.70.0070.05320.16
5.5.60.0100.04320.16
5.5.50.0100.07020.18
5.5.40.0030.07720.00
5.5.30.0100.06720.09
5.5.20.0000.05320.13
5.5.10.0070.07320.06
5.5.00.0070.07720.05
5.4.450.0130.07319.18
5.4.440.0070.07719.51
5.4.430.0130.07719.48
5.4.420.0100.05319.22
5.4.410.0170.07319.29
5.4.400.0130.07719.21
5.4.390.0030.08019.10
5.4.380.0070.07019.13
5.4.370.0030.07719.13
5.4.360.0070.07719.13
5.4.350.0070.06319.18
5.4.340.0030.07019.04
5.4.320.0130.07019.04
5.4.310.0000.08018.90
5.4.300.0070.07019.04
5.4.290.0000.08719.21
5.4.280.0070.08019.16
5.4.270.0100.07318.85
5.4.260.0170.06318.89
5.4.250.0030.08019.12
5.4.240.0030.06018.84
5.4.230.0100.07019.05
5.4.220.0130.03718.95
5.4.210.0200.04019.18
5.4.200.0030.07319.09
5.4.190.0130.04019.15
5.4.180.0000.08018.87
5.4.170.0070.04319.02
5.4.160.0030.08018.98
5.4.150.0000.08018.86
5.4.140.0100.07016.29
5.4.130.0070.04016.48
5.4.120.0100.06716.33
5.4.110.0070.06016.43
5.4.100.0100.07016.46
5.4.90.0100.06316.46
5.4.80.0030.04316.50
5.4.70.0130.06316.45
5.4.60.0030.07716.44
5.4.50.0100.06316.45
5.4.40.0070.07016.35
5.4.30.0030.07316.45
5.4.20.0100.07316.48
5.4.10.0070.07016.26
5.4.00.0030.07315.86
5.3.290.0100.07714.77
5.3.280.0030.08014.55
5.3.270.0130.07014.72
5.3.260.0030.08014.67
5.3.250.0100.06714.68
5.3.240.0070.07314.73
5.3.230.0000.08014.66
5.3.220.0130.07314.62
5.3.210.0030.07714.60
5.3.200.0030.07714.70
5.3.190.0100.07314.66
5.3.180.0030.07714.67
5.3.170.0100.05714.57
5.3.160.0070.07314.62
5.3.150.0000.07314.57
5.3.140.0070.04014.70
5.3.130.0000.07714.61
5.3.120.0070.08014.64
5.3.110.0070.07314.57
5.3.100.0130.04314.16
5.3.90.0030.07314.09
5.3.80.0000.07313.95
5.3.70.0030.07714.09
5.3.60.0130.07313.93
5.3.50.0100.06314.00
5.3.40.0100.04013.95
5.3.30.0070.06313.93
5.3.20.0030.05013.58
5.3.10.0030.07313.59
5.3.00.0030.07313.64
5.2.170.0100.05711.21
5.2.160.0070.05711.08
5.2.150.0030.04711.01
5.2.140.0070.06011.04
5.2.130.0000.06311.17
5.2.120.0030.04711.09
5.2.110.0070.06011.11
5.2.100.0100.05311.02
5.2.90.0170.05711.21
5.2.80.0070.06311.16
5.2.70.0100.05311.22
5.2.60.0100.05311.11
5.2.50.0030.06011.12
5.2.40.0030.03711.11
5.2.30.0000.07011.10
5.2.20.0070.04311.10
5.2.10.0100.05710.89
5.2.00.0030.06010.63
5.1.60.0030.03710.07
5.1.50.0030.03010.07
5.1.40.0030.03010.07
5.1.30.0100.05310.37
5.1.20.0030.05710.28
5.1.10.0070.05310.10
5.1.00.0030.06010.10
5.0.50.0000.03710.07
5.0.40.0030.04710.07
5.0.30.0000.07010.07
5.0.20.0100.03710.07
5.0.10.0100.03710.07
5.0.00.0100.06010.07
4.4.90.0100.02710.07
4.4.80.0000.02310.07
4.4.70.0030.03310.07
4.4.60.0000.04010.07
4.4.50.0070.03310.07
4.4.40.0000.05710.07
4.4.30.0000.04010.07
4.4.20.0000.03010.07
4.4.10.0000.03710.07
4.4.00.0030.05310.07
4.3.110.0070.03010.07
4.3.100.0030.01710.07
4.3.90.0070.03010.07
4.3.80.0070.04010.07
4.3.70.0070.03010.07
4.3.60.0030.02710.07
4.3.50.0030.03310.07
4.3.40.0070.04710.07
4.3.30.0030.03010.07
4.3.20.0000.02010.07
4.3.10.0000.03710.07
4.3.00.0030.02710.07

preferences:
55.31 ms | 401 KiB | 5 Q