3v4l.org

run code in 300+ PHP versions simultaneously
<?php $rest = substr("abcdef", 0,1); echo $rest; ?>

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)
8.3.40.0110.00318.72
8.3.30.0070.00718.91
8.3.20.0070.00020.20
8.3.10.0040.00421.87
8.3.00.0040.00422.34
8.2.170.0030.01618.79
8.2.160.0100.00322.96
8.2.150.0040.00425.66
8.2.140.0040.00424.66
8.2.130.0080.00026.16
8.2.120.0090.00017.50
8.2.110.0000.01121.00
8.2.100.0040.00717.91
8.2.90.0080.00018.03
8.2.80.0000.00917.97
8.2.70.0060.00317.50
8.2.60.0060.00317.91
8.2.50.0090.00018.07
8.2.40.0060.00319.75
8.2.30.0000.00718.13
8.2.20.0040.00417.61
8.2.10.0000.00718.06
8.2.00.0030.00618.04
8.1.270.0070.01120.05
8.1.260.0040.00426.35
8.1.250.0050.00228.09
8.1.240.0000.00922.57
8.1.230.0090.00320.88
8.1.220.0080.00017.74
8.1.210.0070.00019.03
8.1.200.0090.00017.35
8.1.190.0000.00817.23
8.1.180.0050.00218.10
8.1.170.0000.00818.41
8.1.160.0070.00021.94
8.1.150.0000.00718.83
8.1.140.0000.00717.38
8.1.130.0070.00017.64
8.1.120.0030.00317.43
8.1.110.0000.00717.43
8.1.100.0030.00317.43
8.1.90.0040.00417.41
8.1.80.0080.00017.41
8.1.70.0070.00017.37
8.1.60.0050.00317.52
8.1.50.0040.00417.50
8.1.40.0030.00617.43
8.1.30.0050.00317.56
8.1.20.0000.00817.54
8.1.10.0050.00217.52
8.1.00.0070.00017.47
8.0.300.0000.00820.03
8.0.290.0050.00316.75
8.0.280.0030.00318.43
8.0.270.0030.00317.27
8.0.260.0060.00017.13
8.0.250.0030.00316.93
8.0.240.0030.00316.82
8.0.230.0030.00316.81
8.0.220.0050.00216.89
8.0.210.0070.00016.81
8.0.200.0000.00616.87
8.0.190.0040.00416.88
8.0.180.0040.00416.86
8.0.170.0040.00416.87
8.0.160.0000.00816.70
8.0.150.0040.00416.81
8.0.140.0070.00016.76
8.0.130.0030.00313.21
8.0.120.0000.00816.68
8.0.110.0000.00816.84
8.0.100.0000.00816.88
8.0.90.0000.00716.71
8.0.80.0050.01016.82
8.0.70.0000.00716.71
8.0.60.0080.00016.87
8.0.50.0050.00316.71
8.0.30.0070.01217.05
8.0.20.0100.00817.40
8.0.10.0000.00716.79
8.0.00.0080.01016.72
7.4.330.0000.00515.08
7.4.320.0030.00316.52
7.4.300.0060.00016.45
7.4.290.0000.00716.46
7.4.280.0000.00916.57
7.4.270.0040.00416.49
7.4.260.0000.00716.42
7.4.250.0000.00716.46
7.4.240.0040.00316.42
7.4.230.0030.00316.33
7.4.220.0110.00716.52
7.4.210.0000.01416.50
7.4.200.0070.00016.51
7.4.160.0060.01616.58
7.4.150.0130.01317.40
7.4.140.0110.01117.86
7.4.130.0120.01116.42
7.4.120.0060.01216.40
7.4.110.0100.00716.50
7.4.100.0110.00916.25
7.4.90.0110.00616.44
7.4.80.0040.01519.39
7.4.70.0030.01416.33
7.4.60.0100.01016.54
7.4.50.0060.00316.43
7.4.40.0110.00716.57
7.4.30.0090.01316.41
7.4.00.0070.01015.03
7.3.330.0000.00513.12
7.3.320.0020.00213.10
7.3.310.0070.00016.16
7.3.300.0060.00016.19
7.3.290.0070.00016.09
7.3.280.0090.00816.15
7.3.270.0140.00317.40
7.3.260.0090.00616.09
7.3.250.0100.00716.29
7.3.240.0080.00816.15
7.3.230.0090.00916.58
7.3.210.0030.01416.19
7.3.200.0130.00719.39
7.3.190.0040.01216.45
7.3.180.0030.01216.18
7.3.170.0100.00616.33
7.3.160.0130.00316.18
7.3.10.0110.00016.57
7.3.00.0040.00716.57
7.2.330.0120.00616.64
7.2.320.0090.01216.34
7.2.310.0100.00716.43
7.2.300.0090.01316.38
7.2.290.0100.01316.56
7.2.130.0030.01017.00
7.2.120.0040.00416.57
7.2.110.0070.00317.06
7.2.100.0090.00316.86
7.2.90.0100.00316.97
7.2.80.0050.00816.61
7.2.70.0060.00916.43
7.2.60.0090.00616.78
7.2.50.0050.00816.79
7.2.40.0060.00616.45
7.2.30.0090.00316.39
7.2.20.0040.00816.70
7.2.10.0100.00316.77
7.2.00.0030.01217.99
7.1.250.0070.00315.75
7.1.200.0100.00015.72
7.1.100.0030.00818.15
7.1.70.0110.00317.09
7.1.60.0070.00719.59
7.1.50.0140.01116.82
7.1.00.0070.07322.57
7.0.200.0200.00814.80
7.0.60.0100.08320.01
7.0.50.0030.08717.68
7.0.40.0100.08319.98
7.0.30.0270.08020.18
7.0.20.0330.06720.34
7.0.10.0270.08320.30
7.0.00.0100.07320.30
5.6.280.0000.03320.88
5.6.210.0100.07720.66
5.6.200.0070.05718.22
5.6.190.0030.04320.46
5.6.180.3400.04020.41
5.6.170.0400.05020.54
5.6.160.0070.07320.50
5.6.150.0070.05018.12
5.6.140.0100.04718.17
5.6.130.0100.03718.12
5.6.120.0100.08020.98
5.6.110.0170.08021.11
5.6.100.0100.08021.12
5.6.90.0100.08320.97
5.6.80.0000.05720.50
5.6.70.0100.04320.52
5.5.350.0170.08720.43
5.5.340.0100.08017.99
5.5.330.0100.04720.21
5.5.320.0430.07320.20
5.5.310.0070.04720.21
5.5.300.0100.07717.98
5.5.290.0070.03718.01
5.5.280.0070.04020.86
5.5.270.0100.06020.96
5.5.260.0200.07020.75
5.5.250.0070.08020.60
5.5.240.3630.04020.15
5.4.450.0070.07719.52
5.4.440.0430.05719.18
5.4.430.0600.06019.53
5.4.420.0830.06019.65
5.4.410.0670.06319.38
5.4.400.0900.05019.20
5.4.390.0870.05719.33
5.4.380.0700.05319.18
5.4.370.0700.06318.89
5.4.360.0730.04318.93
5.4.350.0230.05018.82
5.4.340.0470.05719.21
5.4.320.0530.06719.19
5.4.310.0800.05319.32
5.4.300.0870.05019.09
5.4.290.0870.04718.89
5.4.280.0830.04719.32
5.4.270.0870.04719.18
5.4.260.0100.06019.00
5.4.250.0330.05719.14
5.4.240.0670.05019.03
5.4.230.0700.05318.99
5.4.220.0930.07318.89
5.4.210.0900.04719.13
5.4.200.0800.04316.71
5.4.190.1070.04318.99
5.4.180.0970.06718.99
5.4.170.0970.06019.14
5.4.160.0630.06719.12
5.4.150.0730.05718.90
5.4.140.0970.05316.38
5.4.130.0570.05316.53
5.4.120.0800.05016.13
5.4.110.0770.05016.34
5.4.100.1030.05316.37
5.4.90.0830.05316.41
5.4.80.0630.05316.16
5.4.70.0800.04316.39
5.4.60.0670.05716.31
5.4.50.0670.05316.20
5.4.40.0670.05016.32
5.4.30.0730.05316.53
5.4.20.0630.05316.48
5.4.10.0800.05016.37
5.4.00.0770.05015.58
5.3.290.0470.06014.66
5.3.280.0400.05714.44
5.3.270.0300.06014.53
5.3.260.0700.05314.61
5.3.250.0770.05714.46
5.3.240.0870.05014.44
5.3.230.0800.04714.54
5.3.220.0730.05314.50
5.3.210.0730.05014.58
5.3.200.0830.05014.52
5.3.190.0870.05314.35
5.3.180.0830.04314.56
5.3.170.0830.04714.47
5.3.160.0700.05714.40
5.3.150.0630.05714.41
5.3.140.0700.05314.55
5.3.130.0730.05314.55
5.3.120.0800.06014.41
5.3.110.0730.05714.37
5.3.100.0570.06314.05
5.3.90.0800.05714.00
5.3.80.0630.06013.90
5.3.70.0900.04713.95
5.3.60.0730.05013.83
5.3.50.0800.05313.83
5.3.40.0900.05713.80
5.3.30.0600.05013.83
5.3.20.0670.05013.54
5.3.10.0670.04313.57
5.3.00.0700.05013.47
5.2.170.0530.03711.13
5.2.160.0730.03710.97
5.2.150.0570.04711.04
5.2.140.0670.05311.05
5.2.130.0670.04711.02
5.2.120.0670.04310.99
5.2.110.0600.04711.04
5.2.100.0700.04311.19
5.2.90.0630.04711.20
5.2.80.0700.04311.03
5.2.70.0670.04010.98
5.2.60.0770.03710.94
5.2.50.0670.05011.01
5.2.40.0500.03711.03
5.2.30.0400.04010.82
5.2.20.0500.04710.89
5.2.10.0570.04010.77
5.2.00.0430.04710.65
5.1.60.0430.0439.96
5.1.50.0500.03310.02
5.1.40.0700.0309.96
5.1.30.0500.04010.27
5.1.20.0630.03710.42
5.1.10.0570.04310.10
5.1.00.0470.0379.95
5.0.50.0300.0278.46
5.0.40.0200.0308.36
5.0.30.0300.0408.21
5.0.20.0270.0278.04
5.0.10.0230.0338.09
5.0.00.0330.0438.13
4.4.90.0170.0235.86
4.4.80.0170.0305.77
4.4.70.0330.0275.72
4.4.60.0300.0175.77
4.4.50.0230.0375.81
4.4.40.0370.0435.90
4.4.30.0230.0235.83
4.4.20.0270.0275.87
4.4.10.0300.0205.80
4.4.00.0130.0405.92
4.3.110.0300.0205.70
4.3.100.0230.0205.68
4.3.90.0370.0275.74
4.3.80.0230.0475.75
4.3.70.0170.0335.73
4.3.60.0270.0235.75
4.3.50.0230.0275.77
4.3.40.0130.0475.68
4.3.30.0130.0204.44
4.3.20.0100.0274.50
4.3.10.0100.0274.34
4.3.00.0100.02310.80

preferences:
54.34 ms | 400 KiB | 5 Q