3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump((string)substr('X', 1));

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)
8.3.60.0040.01116.50
8.3.50.0070.00717.96
8.3.40.0070.00718.73
8.3.30.0090.00618.92
8.3.20.0040.00420.16
8.3.10.0070.00021.90
8.3.00.0040.00419.13
8.2.180.0120.00616.50
8.2.170.0110.00422.96
8.2.160.0100.00720.48
8.2.150.0040.00424.18
8.2.140.0050.00324.66
8.2.130.0080.00026.16
8.2.120.0070.00019.65
8.2.110.0030.00621.00
8.2.100.0180.00617.37
8.2.90.0050.00319.08
8.2.80.0000.00817.97
8.2.70.0060.00317.50
8.2.60.0030.00617.91
8.2.50.0040.00418.07
8.2.40.0000.00717.97
8.2.30.0000.00717.98
8.2.20.0020.00517.55
8.2.10.0000.00717.87
8.2.00.0000.00817.54
8.1.280.0170.00325.92
8.1.270.0030.00518.83
8.1.260.0000.00726.35
8.1.250.0070.00028.09
8.1.240.0030.00622.12
8.1.230.0050.00518.87
8.1.220.0050.00317.74
8.1.210.0000.00818.77
8.1.200.0000.00817.23
8.1.190.0080.00017.11
8.1.180.0030.00518.10
8.1.170.0040.00818.57
8.1.160.0040.00421.87
8.1.150.0070.00018.76
8.1.140.0030.00517.25
8.1.130.0030.00317.43
8.1.120.0030.00317.34
8.1.110.0050.00317.39
8.1.100.0000.00717.36
8.1.90.0030.00517.42
8.1.80.0000.00717.29
8.1.70.0030.00317.21
8.1.60.0080.00017.54
8.1.50.0050.00317.42
8.1.40.0050.00217.35
8.1.30.0060.00317.41
8.1.20.0000.00817.48
8.1.10.0040.00417.38
8.1.00.0080.00017.18
8.0.300.0040.00418.77
8.0.290.0050.00216.63
8.0.280.0000.00718.24
8.0.270.0040.00417.00
8.0.260.0030.00316.61
8.0.250.0000.00716.83
8.0.240.0040.00416.83
8.0.230.0000.00916.80
8.0.220.0020.00516.82
8.0.210.0000.00716.68
8.0.200.0000.00616.81
8.0.190.0040.00416.69
8.0.180.0000.00716.86
8.0.170.0050.00216.78
8.0.160.0040.00416.71
8.0.150.0040.00416.62
8.0.140.0050.00216.62
8.0.130.0050.00013.18
8.0.120.0030.00616.74
8.0.110.0070.00016.68
8.0.100.0000.00716.80
8.0.90.0040.00416.66
8.0.80.0110.00716.81
8.0.70.0000.00716.57
8.0.60.0000.00716.80
8.0.50.0000.00816.63
8.0.30.0090.01017.08
8.0.20.0130.00517.40
8.0.10.0040.00416.80
8.0.00.0120.00516.57
7.4.330.0050.00015.03
7.4.320.0000.00616.45
7.4.300.0000.00716.38
7.4.290.0030.00516.44
7.4.280.0040.00416.55
7.4.270.0030.00316.52
7.4.260.0000.00716.55
7.4.250.0040.00416.47
7.4.240.0060.00216.44
7.4.230.0000.00716.34
7.4.220.0090.00916.45
7.4.210.0110.00816.38
7.4.200.0030.00516.48
7.4.160.0040.01116.40
7.4.150.0080.00817.40
7.4.140.0070.01317.86
7.4.130.0060.01216.45
7.4.120.0090.00716.38
7.4.110.0090.00916.43
7.4.100.0060.01216.40
7.4.90.0130.00316.50
7.4.80.0060.01019.39
7.4.70.0110.00716.36
7.4.60.0090.00616.28
7.4.50.0040.00416.33
7.4.40.0110.00516.42
7.4.30.0100.00616.35
7.4.00.0080.00814.87
7.3.330.0000.00613.04
7.3.320.0060.00612.94
7.3.310.0030.00316.27
7.3.300.0040.00416.23
7.3.290.0040.00416.05
7.3.280.0100.00716.16
7.3.270.0120.01217.40
7.3.260.0060.01316.29
7.3.250.0100.00916.23
7.3.240.0080.00816.23
7.3.230.0030.01316.41
7.3.210.0080.00816.39
7.3.200.0040.01419.39
7.3.190.0070.01016.15
7.3.180.0040.01116.24
7.3.170.0060.00916.27
7.3.160.0140.00316.31
7.3.120.0130.00614.65
7.3.110.0070.00814.59
7.3.100.0030.01114.80
7.3.90.0110.00314.66
7.3.80.0070.01014.47
7.3.70.0080.00714.72
7.3.60.0030.01214.78
7.3.50.0050.00714.51
7.3.40.0090.00414.75
7.3.30.0060.00414.50
7.3.20.0070.00816.52
7.3.10.0060.00716.48
7.3.00.0070.00616.49
7.2.330.0130.00316.23
7.2.320.0390.00716.67
7.2.310.0160.00616.49
7.2.300.0110.00716.57
7.2.290.0130.01016.29
7.2.250.0060.01114.80
7.2.240.0080.01214.86
7.2.230.0060.00814.80
7.2.220.0030.01014.68
7.2.210.0050.00914.93
7.2.200.0060.00914.90
7.2.190.0010.01214.62
7.2.180.0020.01314.63
7.2.170.0070.01014.55
7.2.00.0040.01419.23
7.1.330.0070.01015.65
7.1.320.0050.01015.71
7.1.310.0070.00715.73
7.1.300.0050.00715.72
7.1.290.0030.01115.70
7.1.280.0060.01015.56
7.1.270.0100.00315.73
7.1.260.0090.00515.67
7.1.100.0130.00618.24
7.1.70.0070.00317.07
7.1.60.0070.01419.50
7.1.50.0140.01016.57
7.1.00.0000.08022.44
7.0.200.0040.00716.85
7.0.140.0000.07721.98
7.0.60.0130.07319.89
7.0.50.0070.06717.84
7.0.40.0100.06320.26
7.0.30.0200.04020.01
7.0.20.0230.05720.04
7.0.10.0300.08020.00
7.0.00.0200.07720.33
5.6.280.0000.07720.80
5.6.210.0230.07020.50
5.6.200.0070.04018.21
5.6.190.0130.07020.60
5.6.180.0370.06720.32
5.6.170.0330.06320.40
5.6.160.0070.05020.51
5.6.150.0070.08018.19
5.6.140.0030.08318.18
5.6.130.0000.04318.21
5.6.120.0130.06721.10
5.6.110.0100.03721.08
5.6.100.0170.06321.02
5.6.90.0030.04720.87
5.6.80.0030.08020.51
5.6.70.0230.07720.34
5.5.350.0030.05020.38
5.5.340.0030.06018.02
5.5.330.0170.07320.47
5.5.320.0130.04020.27
5.5.310.0230.08720.19
5.5.300.0100.05318.00
5.5.290.0070.08018.01
5.5.280.0070.03720.95
5.5.270.0130.08020.78
5.5.260.0030.08720.63
5.5.250.0000.08720.49
5.5.240.0070.07720.25
5.4.450.0730.05019.13
5.4.440.0930.05019.52
5.4.430.0970.05319.54
5.4.420.0900.05719.63
5.4.410.0130.05019.42
5.4.400.0300.05318.73
5.4.390.0400.05318.69
5.4.380.0330.06718.72
5.4.370.0400.05018.71
5.4.360.0330.05018.68
5.4.350.0230.06318.63
5.4.340.0230.06318.53
5.4.320.0400.06018.48
5.4.310.0300.05018.71
5.4.300.0470.04018.61
5.4.290.0400.04318.49
5.4.280.0300.05318.54
5.4.270.0370.05018.61
5.4.260.0270.05718.67
5.4.250.0330.05718.69
5.4.240.0330.05018.52
5.4.230.0370.04318.67
5.4.220.0400.04718.64
5.4.210.0270.06718.68
5.4.200.0330.05016.56
5.4.190.0370.05318.79
5.4.180.0230.06018.74
5.4.170.0330.05018.70
5.4.160.0400.05718.59
5.4.150.0370.06318.70
5.4.140.0270.06016.17
5.4.130.0400.04316.31
5.4.120.0430.04716.21
5.4.110.0400.05016.06
5.4.100.0330.05316.19
5.4.90.0330.05316.11
5.4.80.0230.06016.29
5.4.70.0400.05316.27
5.4.60.0200.05716.29
5.4.50.0370.04316.01
5.4.40.0300.05316.13
5.4.30.0330.05716.31
5.4.20.0330.05316.18
5.4.10.0370.05016.08
5.4.00.0300.06015.77
5.3.290.0300.06314.73
5.3.280.0400.04714.58
5.3.270.0370.04714.53
5.3.260.0270.06014.55
5.3.250.0200.06314.65
5.3.240.0300.05314.53
5.3.230.0270.05714.57
5.3.220.0330.05314.49
5.3.210.0330.06714.51
5.3.200.0400.05714.59
5.3.190.0330.04714.59
5.3.180.0270.05714.54
5.3.170.0270.05014.58
5.3.160.0230.05714.65
5.3.150.0330.05014.49
5.3.140.0300.05714.54
5.3.130.0370.05714.52
5.3.120.0330.05314.55
5.3.110.0370.05714.54
5.3.100.0330.04314.02
5.3.90.0300.05014.02
5.3.80.0370.04314.09
5.3.70.0230.05313.96
5.3.60.0400.04314.09
5.3.50.0370.04713.97
5.3.40.0230.06013.91
5.3.30.0370.05313.92
5.3.20.0270.05713.59
5.3.10.0230.05313.64
5.3.00.0270.07313.63
5.2.170.0230.04011.14
5.2.160.0270.03711.27
5.2.150.0200.04311.09
5.2.140.0270.04011.16
5.2.130.0270.04011.05
5.2.120.0170.04311.02
5.2.110.0200.04011.03
5.2.100.0130.04311.25
5.2.90.0170.04711.05
5.2.80.0230.04011.23
5.2.70.0130.04711.09
5.2.60.0300.03311.05
5.2.50.0370.04310.96
5.2.40.0170.04010.97
5.2.30.0170.05310.95
5.2.20.0130.04010.93
5.2.10.0070.05310.99
5.2.00.0200.04310.85
5.1.60.0130.0309.99
5.1.50.0100.03710.09
5.1.40.0100.04310.00
5.1.30.0200.04010.32
5.1.20.0270.05010.46
5.1.10.0230.03710.13
5.1.00.0370.03710.08
5.0.50.0130.0408.56
5.0.40.0130.0278.38
5.0.30.0130.0478.27
5.0.20.0130.0378.32
5.0.10.0070.0438.35
5.0.00.0170.0508.33
4.4.90.0070.0235.90
4.4.80.0070.0235.86
4.4.70.0170.0175.87
4.4.60.0130.0275.91
4.4.50.0130.0175.87
4.4.40.0070.0405.85
4.4.30.0130.0275.89
4.4.20.0100.0305.88
4.4.10.0100.0205.88
4.4.00.0130.0335.93
4.3.110.0100.0235.80
4.3.100.0100.0235.79
4.3.90.0100.0205.79
4.3.80.0100.0335.81
4.3.70.0100.0235.93
4.3.60.0030.0275.85
4.3.50.0130.0205.83
4.3.40.0170.0305.75
4.3.30.0070.0274.58
4.3.20.0100.0204.58
4.3.10.0100.0174.58
4.3.00.0070.0236.95

preferences:
57.74 ms | 400 KiB | 5 Q