3v4l.org

run code in 300+ PHP versions simultaneously
<?php $string = "foobar"; var_dump(isset($string[1]), isset($string[997])); unset($string[1]); unset($string[997]); var_dump(bin2hex($string));

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)
8.3.70.0190.00018.55
8.3.60.0140.00718.55
8.3.50.0120.01021.98
8.3.40.0110.00418.82
8.3.30.0000.01419.22
8.3.20.0070.00020.35
8.3.10.0080.00022.13
8.3.00.0040.00422.27
8.2.180.0080.00816.88
8.2.170.0130.00622.96
8.2.160.0070.00720.80
8.2.150.0030.00724.18
8.2.140.0000.00824.66
8.2.130.0140.00326.16
8.2.120.0050.00317.63
8.2.110.0040.00421.04
8.2.100.0040.00817.91
8.2.90.0080.00018.96
8.2.80.0030.00517.97
8.2.70.0030.00617.63
8.2.60.0040.00717.93
8.2.50.0090.00018.10
8.2.40.0080.00018.22
8.2.30.0000.00718.04
8.2.20.0000.00817.59
8.2.10.0050.00217.60
8.2.00.0000.00817.79
8.1.280.0140.00325.92
8.1.270.0060.00321.92
8.1.260.0000.00726.35
8.1.250.0070.00028.09
8.1.240.0040.00422.20
8.1.230.0070.00317.83
8.1.220.0000.00717.74
8.1.210.0040.00418.77
8.1.200.0090.00017.22
8.1.190.0050.00317.10
8.1.180.0040.00418.10
8.1.170.0000.00818.59
8.1.160.0040.00421.98
8.1.150.0050.00218.53
8.1.140.0040.00417.41
8.1.130.0030.00317.73
8.1.120.0000.00717.29
8.1.110.0030.00617.43
8.1.100.0030.00517.44
8.1.90.0000.00717.29
8.1.80.0030.00517.41
8.1.70.0040.00417.25
8.1.60.0040.00417.38
8.1.50.0060.00317.51
8.1.40.0000.00717.50
8.1.30.0040.00417.57
8.1.20.0000.00817.65
8.1.10.0040.00417.56
8.1.00.0000.00817.42
8.0.300.0090.00018.77
8.0.290.0030.00616.75
8.0.280.0070.00018.32
8.0.270.0000.00717.13
8.0.260.0030.00316.83
8.0.250.0030.00316.92
8.0.240.0070.00016.96
8.0.230.0000.01016.70
8.0.220.0000.00716.91
8.0.210.0000.00716.78
8.0.200.0000.00616.95
8.0.190.0030.00616.97
8.0.180.0000.00716.80
8.0.170.0040.00416.90
8.0.160.0040.00416.91
8.0.150.0000.00716.84
8.0.140.0040.00416.75
8.0.130.0000.00513.34
8.0.120.0040.00416.87
8.0.110.0070.00016.79
8.0.100.0070.00016.91
8.0.90.0030.00516.89
8.0.80.0060.00916.89
8.0.70.0030.00616.69
8.0.60.0040.00416.93
8.0.50.0040.00416.79
8.0.30.0080.01317.19
8.0.20.0120.00917.40
8.0.10.0030.00516.81
8.0.00.0110.00816.73
7.4.330.0050.00015.00
7.4.320.0000.00616.50
7.4.300.0030.00316.59
7.4.290.0000.00716.59
7.4.280.0000.00616.44
7.4.270.0000.00716.61
7.4.260.0030.00316.41
7.4.250.0030.00516.46
7.4.240.0020.00516.58
7.4.230.0030.00316.53
7.4.220.0130.00316.60
7.4.210.0030.01216.59
7.4.200.0000.00716.38
7.4.190.0030.00316.61
7.4.160.0130.00616.48
7.4.150.0160.00617.40
7.4.140.0100.01017.86
7.4.130.0080.00916.54
7.4.120.0060.01216.54
7.4.110.0140.00316.61
7.4.100.0100.00716.50
7.4.90.0100.01016.46
7.4.80.0090.01319.39
7.4.70.0070.01016.41
7.4.60.0070.01016.63
7.4.50.0050.00316.41
7.4.40.0120.00422.77
7.4.30.0060.01116.59
7.4.00.0030.01215.14
7.3.330.0050.00013.25
7.3.320.0000.00513.23
7.3.310.0070.00016.16
7.3.300.0000.00716.32
7.3.290.0140.00716.28
7.3.280.0090.00716.31
7.3.270.0070.01017.40
7.3.260.0110.00516.44
7.3.250.0150.00616.25
7.3.240.0070.01016.30
7.3.230.0130.01016.39
7.3.210.0140.00316.64
7.3.200.0110.00519.39
7.3.190.0140.00816.27
7.3.180.0110.00416.20
7.3.170.0120.00616.33
7.3.160.0160.00716.36
7.3.120.0000.01714.75
7.2.330.0120.00816.59
7.2.320.0100.00716.45
7.2.310.0060.01216.66
7.2.300.0060.01016.32
7.2.290.0070.01016.62
7.2.60.0060.00916.79
7.2.00.0000.01219.09
7.1.200.0040.00815.57
7.1.100.0030.00918.24
7.1.70.0040.01116.89
7.1.60.0100.00719.82
7.1.50.0100.01016.93
7.1.00.0000.08022.35
7.0.200.0030.00716.74
7.0.140.0030.07721.95
7.0.60.0070.08020.05
7.0.50.0100.04317.66
7.0.40.0170.08020.05
7.0.30.0330.07320.23
7.0.20.0170.04720.09
7.0.10.0000.06020.30
7.0.00.0100.08320.20
5.6.280.0000.09321.10
5.6.210.0100.08020.69
5.6.200.0000.04718.21
5.6.190.0030.09020.45
5.6.180.0330.06720.65
5.6.170.0200.05020.42
5.6.160.0170.07020.38
5.6.150.0070.04718.16
5.6.140.0130.03318.18
5.6.130.0100.07018.15
5.6.120.0030.06720.95
5.6.110.0070.09021.03
5.6.100.0100.07020.97
5.6.90.0100.06320.96
5.6.80.0130.07020.37
5.5.350.3330.04320.34
5.5.340.0030.04718.00
5.5.330.0100.08020.29
5.5.320.0170.04320.17
5.5.310.0270.06320.17
5.5.300.0100.04017.98
5.5.290.0000.04718.02
5.5.280.0230.05020.79
5.5.270.0030.04320.64
5.5.260.0070.04320.83
5.5.250.0030.08320.60
5.5.240.0270.07020.06
5.4.450.0430.06019.26
5.4.440.0470.07319.48
5.4.430.0500.04719.56
5.4.420.0400.04719.20
5.4.410.0470.06718.97
5.4.400.0570.06018.78
5.4.390.0470.05318.77
5.4.380.0370.04019.08
5.4.370.0470.06019.16
5.4.360.0330.04319.12
5.4.350.0470.03019.25
5.4.340.0400.03318.91
5.4.320.0500.04319.24
5.4.310.0530.06319.13
5.4.300.0470.05319.08
5.4.290.0470.07018.80
5.4.280.0430.07018.82
5.4.270.0500.06018.93
5.4.260.0470.05019.13
5.4.250.0400.04019.23
5.4.240.0470.04319.08
5.4.230.0400.03319.07
5.4.220.0300.04319.09
5.4.210.0370.03719.23
5.4.200.0430.07018.79
5.4.190.0500.07019.07
5.4.180.0400.04019.08
5.4.170.0400.04719.08
5.4.160.0600.05719.14
5.4.150.0370.04019.18
5.4.140.0270.04316.34
5.4.130.0330.04016.45
5.4.120.0530.05716.16
5.4.110.0470.04716.38
5.4.100.0470.05716.39
5.4.90.0370.04016.43
5.4.80.0500.03716.41
5.4.70.0470.04016.41
5.4.60.0470.04016.37
5.4.50.0570.06016.32
5.4.40.0430.03016.36
5.4.30.0400.03016.36
5.4.20.0500.05716.26
5.4.10.0570.04016.39
5.4.00.0330.03715.71
5.3.290.0400.06714.50
5.3.280.0370.04014.52
5.3.270.0530.06014.54
5.3.260.0470.06714.46
5.3.250.0400.03714.44
5.3.240.0400.07014.50
5.3.230.0270.05314.50
5.3.220.0470.05314.42
5.3.210.0500.04714.51
5.3.200.0430.05014.66
5.3.190.0470.06314.50
5.3.180.0330.04014.40
5.3.170.0370.03714.40
5.3.160.0400.06714.51
5.3.150.0430.07014.46
5.3.140.0430.04014.46
5.3.130.0300.04014.64
5.3.120.0370.03714.48
5.3.110.0300.03714.40
5.3.100.0270.04014.30
5.3.90.0370.06714.30
5.3.80.0330.04314.30
5.3.70.0370.06314.30
5.3.60.0370.03714.30
5.3.50.0330.05014.30
5.3.40.0370.04014.30
5.3.30.0330.03314.30
5.3.20.0370.04014.30
5.3.10.0330.03714.30
5.3.00.0400.06014.30
5.2.170.0230.03014.30
5.2.160.0230.03014.30
5.2.150.0330.06014.30
5.2.140.0230.04014.30
5.2.130.0270.02714.30
5.2.120.0300.03314.30
5.2.110.0400.04714.30
5.2.100.0230.03714.30
5.2.90.0370.04314.30
5.2.80.0270.02714.30
5.2.70.0200.03314.30
5.2.60.0270.03714.30
5.2.50.0300.03714.30
5.2.40.0230.03014.30
5.2.30.0230.04314.30
5.2.20.0230.03314.30
5.2.10.0200.03014.30
5.2.00.0200.04314.30
5.1.60.0270.04014.30
5.1.50.0170.03014.30
5.1.40.0200.03014.30
5.1.30.0170.03014.30
5.1.20.0230.05014.30
5.1.10.0300.04314.30
5.1.00.0330.04314.30
5.0.50.0170.02314.30
5.0.40.0200.03314.30
5.0.30.0170.03014.30
5.0.20.0230.02014.30
5.0.10.0130.01714.30
5.0.00.0130.05314.30
4.4.90.0130.01714.30
4.4.80.0200.03014.30
4.4.70.0130.02714.30
4.4.60.0100.01714.30
4.4.50.0200.02314.30
4.4.40.0130.05014.30
4.4.30.0200.01014.30
4.4.20.0170.02314.30
4.4.10.0170.02714.30
4.4.00.0170.02714.30
4.3.110.0130.02014.30
4.3.100.0170.01314.30
4.3.90.0130.02014.30
4.3.80.0170.02014.30
4.3.70.0100.01714.30
4.3.60.0130.02314.30
4.3.50.0170.01314.30
4.3.40.0100.03014.30
4.3.30.0100.02714.30
4.3.20.0070.01714.30
4.3.10.0070.02314.30
4.3.00.0070.01714.30

preferences:
55.16 ms | 401 KiB | 5 Q