3v4l.org

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

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)
8.3.60.0190.00616.25
8.3.50.0090.01221.97
8.3.40.0120.00918.85
8.3.30.0100.00318.88
8.3.20.0080.00018.48
8.3.10.0040.00423.64
8.3.00.0040.00418.92
8.2.180.0100.01016.38
8.2.170.0070.00718.79
8.2.160.0090.00622.96
8.2.150.0040.00424.18
8.2.140.0030.00524.66
8.2.130.0000.00826.16
8.2.120.0080.00022.09
8.2.110.0090.00020.96
8.2.100.0120.00317.78
8.2.90.0050.00318.96
8.2.80.0000.00917.97
8.2.70.0050.00317.35
8.2.60.0000.00817.91
8.2.50.0000.00818.07
8.2.40.0060.00618.03
8.2.30.0040.00418.04
8.2.20.0060.00317.63
8.2.10.0000.00817.90
8.2.00.0080.00317.97
8.1.280.0100.01325.92
8.1.270.0110.00420.25
8.1.260.0070.00026.35
8.1.250.0070.00028.09
8.1.240.0030.00622.48
8.1.230.0090.00320.84
8.1.220.0000.00818.77
8.1.210.0000.00918.92
8.1.200.0050.00517.24
8.1.190.0080.00017.10
8.1.180.0050.00318.10
8.1.170.0000.00818.59
8.1.160.0000.00721.88
8.1.150.0000.00818.76
8.1.140.0070.00017.32
8.1.130.0030.00317.75
8.1.120.0000.00817.35
8.1.110.0070.00017.22
8.1.100.0000.00817.30
8.1.90.0030.00317.37
8.1.80.0040.00417.21
8.1.70.0030.00317.17
8.1.60.0060.00317.47
8.1.50.0040.00417.32
8.1.40.0040.00417.18
8.1.30.0060.00317.45
8.1.20.0030.00517.44
8.1.10.0000.00717.43
8.1.00.0000.01117.38
8.0.300.0000.00820.01
8.0.290.0040.00416.75
8.0.280.0000.00718.33
8.0.270.0030.00317.18
8.0.260.0060.00017.24
8.0.250.0040.00416.91
8.0.240.0030.00316.65
8.0.230.0030.00716.68
8.0.220.0000.00716.75
8.0.210.0040.00416.66
8.0.200.0000.00716.70
8.0.190.0030.00316.72
8.0.180.0000.00716.69
8.0.170.0040.00416.76
8.0.160.0050.00316.73
8.0.150.0000.00716.74
8.0.140.0040.00416.76
8.0.130.0030.00313.11
8.0.120.0050.00316.63
8.0.110.0000.00816.73
8.0.100.0040.00416.79
8.0.90.0050.00316.80
8.0.80.0060.00916.71
8.0.70.0040.00416.74
8.0.60.0040.00416.73
8.0.50.0000.00716.78
8.0.30.0090.00916.98
8.0.20.0100.01017.40
8.0.10.0000.00716.92
8.0.00.0090.00816.68
7.4.330.0070.00015.03
7.4.320.0030.00516.35
7.4.300.0060.00016.33
7.4.290.0040.00416.35
7.4.280.0040.00416.30
7.4.270.0000.00616.39
7.4.260.0030.00616.49
7.4.250.0030.00316.46
7.4.240.0020.00516.38
7.4.230.0030.00316.53
7.4.220.0090.00916.40
7.4.210.0080.00816.50
7.4.200.0030.00316.41
7.4.160.0150.00716.54
7.4.150.0090.00917.40
7.4.140.0120.00517.86
7.4.130.0170.00616.28
7.4.120.0110.00716.51
7.4.110.0070.01116.24
7.4.100.0060.01216.51
7.4.90.0030.02016.38
7.4.80.0120.00619.39
7.4.70.0110.00616.42
7.4.60.0030.01316.51
7.4.50.0030.00316.48
7.4.40.0090.00616.47
7.4.30.0110.00516.36
7.4.00.0100.00714.98
7.3.330.0000.00512.88
7.3.320.0030.00313.04
7.3.310.0040.00316.26
7.3.300.0060.00016.01
7.3.290.0030.00315.95
7.3.280.0070.01016.14
7.3.270.0180.00717.40
7.3.260.0030.01316.26
7.3.250.0080.00916.22
7.3.240.0110.00716.51
7.3.230.0190.00316.39
7.3.210.0100.00616.31
7.3.200.0160.00919.39
7.3.190.0030.01316.32
7.3.180.0050.01116.22
7.3.170.0120.00616.38
7.3.160.0030.01216.40
7.2.330.0170.00716.57
7.2.320.0070.01716.44
7.2.310.0100.00716.40
7.2.300.0140.00316.51
7.2.290.0110.00716.43
7.2.00.0040.00819.16
7.1.100.0310.00417.86
7.1.70.0030.00617.04
7.1.60.0060.01919.38
7.1.50.0160.00916.77
7.1.00.0100.07022.48
7.0.200.0080.00416.64
7.0.60.0030.04719.85
7.0.50.0000.06317.90
7.0.40.0100.08320.04
7.0.30.0270.07720.05
7.0.20.0330.07020.20
7.0.10.0100.08720.16
7.0.00.0100.08320.00
5.6.280.0030.07320.89
5.6.210.0170.05320.62
5.6.200.0030.05018.23
5.6.190.0030.08320.57
5.6.180.0400.07320.77
5.6.170.0270.03720.50
5.6.160.0100.06720.52
5.6.150.0000.04718.18
5.6.140.0070.05018.07
5.6.130.0100.05018.07
5.6.120.0000.09321.14
5.6.110.0070.08021.00
5.6.100.0130.07321.00
5.6.90.0030.04721.02
5.6.80.0200.03720.40
5.5.350.0200.08020.46
5.5.340.0130.07718.00
5.5.330.0100.08020.37
5.5.320.0330.04020.29
5.5.310.0200.04020.34
5.5.300.0000.04017.97
5.5.290.0100.06017.91
5.5.280.0130.04020.76
5.5.270.0030.04020.80
5.5.260.0170.07320.63
5.5.250.0000.04720.68
5.5.240.0030.07720.36
5.4.450.0670.07019.55
5.4.440.0570.07719.24
5.4.430.0870.05319.57
5.4.420.0130.05019.51
5.4.410.0100.05319.51
5.4.400.0100.05018.94
5.4.390.0070.05319.05
5.4.380.0130.05019.16
5.4.370.0000.06019.00
5.4.360.0030.05719.07
5.4.350.0070.05719.26
5.4.340.0200.04319.09
5.4.320.0170.04719.12
5.4.310.0070.05719.18
5.4.300.0130.05319.05
5.4.290.0170.04318.92
5.4.280.0100.05719.25
5.4.270.0100.05019.05
5.4.260.0000.06019.05
5.4.250.0130.05719.06
5.4.240.0070.05719.00
5.4.230.0070.05319.07
5.4.220.0070.06019.05
5.4.210.0130.04719.14
5.4.200.0130.04316.90
5.4.190.0100.05018.96
5.4.180.0100.05018.90
5.4.170.0170.05318.94
5.4.160.0070.05319.12
5.4.150.0070.05719.02
5.4.140.0130.05016.51
5.4.130.0030.06016.39
5.4.120.0100.04716.41
5.4.110.0200.04016.23
5.4.100.0130.04716.13
5.4.90.0030.05716.34
5.4.80.0100.04716.35
5.4.70.0170.04316.16
5.4.60.0070.05016.19
5.4.50.0030.05316.53
5.4.40.0130.04716.04
5.4.30.0070.05016.48
5.4.20.0130.05716.50
5.4.10.0130.04316.48
5.4.00.0070.05015.58
5.3.290.0070.05714.66
5.3.280.0130.05014.42
5.3.270.0130.05014.54
5.3.260.0100.05714.61
5.3.250.0070.05714.52
5.3.240.0070.05714.61
5.3.230.0030.05714.49
5.3.220.0170.04314.45
5.3.210.0070.05314.43
5.3.200.0130.04714.45
5.3.190.0100.05314.42
5.3.180.0000.06014.41
5.3.170.0030.05714.56
5.3.160.0130.04314.56
5.3.150.0000.06014.43
5.3.140.0100.05014.39
5.3.130.0070.05314.42
5.3.120.0030.06014.38
5.3.110.0100.05314.44
5.3.100.0100.05013.91
5.3.90.0070.05313.93
5.3.80.0070.05313.84
5.3.70.0100.05713.94
5.3.60.0170.04013.86
5.3.50.0030.05313.95
5.3.40.0070.05013.83
5.3.30.0170.04313.79
5.3.20.0100.04713.69
5.3.10.0070.04713.54
5.3.00.0130.04713.46
5.2.170.0100.04311.08
5.2.160.0070.04011.06
5.2.150.0030.04311.14
5.2.140.0030.04710.93
5.2.130.0030.04711.02
5.2.120.0030.04311.05
5.2.110.0070.04011.14
5.2.100.0070.04311.21
5.2.90.0070.04011.14
5.2.80.0070.04011.17
5.2.70.0130.03710.93
5.2.60.0000.05010.98
5.2.50.0070.04010.91
5.2.40.0130.03310.81
5.2.30.0030.04710.91
5.2.20.0030.04310.89
5.2.10.0030.04710.88
5.2.00.0030.04010.63
5.1.60.0070.0339.91
5.1.50.0070.0379.92
5.1.40.0100.0309.85
5.1.30.0030.03710.25
5.1.20.0030.04010.34
5.1.10.0070.03310.16
5.1.00.0000.0409.97
5.0.50.0100.0238.46
5.0.40.0070.0278.35
5.0.30.0030.0438.15
5.0.20.0070.0278.22
5.0.10.0100.0238.21
5.0.00.0000.0578.14
4.4.90.0030.0205.85
4.4.80.0000.0235.85
4.4.70.0070.0175.88
4.4.60.0070.0175.73
4.4.50.0030.0205.75
4.4.40.0030.0335.79
4.4.30.0100.0175.76
4.4.20.0030.0235.91
4.4.10.0000.0235.85
4.4.00.0000.0375.86
4.3.110.0030.0235.79
4.3.100.0030.0205.77
4.3.90.0000.0235.75
4.3.80.0030.0375.75
4.3.70.0070.0235.69
4.3.60.0070.0175.82
4.3.50.0030.0205.66
4.3.40.0030.0335.61
4.3.30.0070.0174.44
4.3.20.0100.0134.39
4.3.10.0000.0234.34
4.3.00.0130.0207.13

preferences:
56.38 ms | 401 KiB | 5 Q