3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = 8; $a = null; var_dump( isset($a));

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)
8.3.60.0140.00718.18
8.3.50.0130.00321.20
8.3.40.0110.00418.56
8.3.30.0100.00320.05
8.3.20.0080.00020.09
8.3.10.0040.00422.00
8.3.00.0000.00722.45
8.2.180.0090.00916.32
8.2.170.0150.00322.96
8.2.160.0030.01022.26
8.2.150.0080.00024.18
8.2.140.0030.00624.66
8.2.130.0040.00426.16
8.2.120.0050.00320.71
8.2.110.0070.00322.08
8.2.100.0090.00317.91
8.2.90.0060.00617.63
8.2.80.0060.00319.66
8.2.70.0000.00917.91
8.2.60.0000.00717.93
8.2.50.0080.00018.10
8.2.40.0040.00420.46
8.2.30.0030.00319.31
8.2.20.0060.00317.64
8.2.10.0030.00617.51
8.2.00.0030.00617.61
8.1.280.0170.00025.92
8.1.270.0070.00024.66
8.1.260.0040.00426.35
8.1.250.0080.00028.09
8.1.240.0060.00323.89
8.1.230.0040.00719.01
8.1.220.0000.00817.74
8.1.210.0030.00618.77
8.1.200.0000.01017.22
8.1.190.0030.00617.23
8.1.180.0060.00318.10
8.1.170.0030.00618.26
8.1.160.0040.00418.88
8.1.150.0040.00418.56
8.1.140.0040.00417.36
8.1.130.0030.00317.88
8.1.120.0000.00717.35
8.1.110.0000.00717.27
8.1.100.0030.00417.39
8.1.90.0070.00017.31
8.1.80.0000.00717.36
8.1.70.0050.00217.37
8.1.60.0000.00817.57
8.1.50.0040.00817.33
8.1.40.0040.00417.37
8.1.30.0000.00817.45
8.1.20.0040.00417.55
8.1.10.0000.00717.39
8.1.00.0040.00417.36
8.0.300.0060.00319.65
8.0.290.0080.00016.58
8.0.280.0030.00318.37
8.0.270.0070.00017.18
8.0.260.0030.00316.66
8.0.250.0030.00316.75
8.0.240.0040.00416.84
8.0.230.0000.00816.84
8.0.220.0040.00416.82
8.0.210.0000.00716.79
8.0.200.0000.00716.84
8.0.190.0030.00716.75
8.0.180.0000.00716.84
8.0.170.0060.00316.77
8.0.160.0030.00316.91
8.0.150.0030.00316.82
8.0.140.0030.00716.76
8.0.130.0030.00313.22
8.0.120.0050.00316.68
8.0.110.0070.00016.65
8.0.100.0000.00716.79
8.0.90.0070.00016.80
8.0.80.0080.00816.71
8.0.70.0040.00416.93
8.0.60.0070.00016.75
8.0.50.0000.00716.75
8.0.30.0080.01116.92
8.0.20.0120.00717.40
8.0.10.0040.00416.96
8.0.00.0060.01416.62
7.4.330.0030.00214.96
7.4.320.0030.00316.53
7.4.300.0000.00616.35
7.4.290.0070.00016.54
7.4.280.0030.00316.32
7.4.270.0040.00316.45
7.4.260.0000.00613.16
7.4.250.0050.00216.49
7.4.240.0070.00016.52
7.4.230.0070.00016.40
7.4.220.0150.00616.45
7.4.210.0060.01016.53
7.4.200.0070.00016.24
7.4.190.0030.00316.69
7.4.160.0090.00616.28
7.4.150.0130.00317.40
7.4.140.0140.00717.86
7.4.130.0110.00516.48
7.4.120.0070.01016.38
7.4.110.0120.00616.39
7.4.100.0120.00616.42
7.4.90.0120.00416.46
7.4.80.0090.00819.39
7.4.70.0150.00716.28
7.4.60.0090.00816.36
7.4.50.0030.00616.26
7.4.40.0110.00422.77
7.4.30.0090.00916.53
7.4.00.0030.01314.79
7.3.330.0030.00313.00
7.3.320.0070.00012.86
7.3.310.0000.00616.12
7.3.300.0070.00016.11
7.3.290.0080.00616.10
7.3.280.0090.00616.07
7.3.270.0120.00617.40
7.3.260.0060.01816.28
7.3.250.0070.01016.16
7.3.240.0120.00916.28
7.3.230.0030.01216.41
7.3.210.0080.00816.49
7.3.200.0030.01419.39
7.3.190.0120.00916.43
7.3.180.0040.01716.46
7.3.170.0060.00916.38
7.3.160.0110.00716.30
7.3.120.0120.00314.89
7.2.330.0070.01016.55
7.2.320.0050.01816.38
7.2.310.0090.01216.61
7.2.300.0000.01816.32
7.2.290.0120.00616.57
7.2.00.0090.00619.29
7.1.100.0170.00317.94
7.1.70.0030.00716.99
7.1.60.0030.02219.21
7.1.50.0140.01434.71
7.1.00.0000.03722.46
7.0.200.0170.00716.33
7.0.140.0000.07722.18
7.0.70.0030.08721.84
7.0.60.0070.05021.66
7.0.50.0000.04722.04
7.0.40.0070.08320.10
7.0.30.0100.07720.14
7.0.20.0070.05020.03
7.0.10.0130.08020.05
7.0.00.0000.06020.14
5.6.280.0030.07321.14
5.6.220.0070.06720.61
5.6.210.0130.08020.56
5.6.200.0100.04720.89
5.6.190.0030.05720.96
5.6.180.0070.08321.01
5.6.170.0170.07321.04
5.6.160.0030.08020.96
5.6.150.0000.04721.03
5.6.140.0000.04321.01
5.6.130.0030.08721.03
5.6.120.0100.08020.99
5.6.110.0100.07720.94
5.6.100.0030.06020.90
5.6.90.0130.08020.97
5.6.80.0070.05020.29
5.6.70.0030.08320.39
5.6.60.0030.08720.31
5.6.50.0170.06720.45
5.6.40.0030.05720.34
5.6.30.0130.08020.37
5.6.20.0030.04320.35
5.6.10.0000.04320.33
5.6.00.0030.04020.29
5.5.360.0100.08020.34
5.5.350.0100.08320.41
5.5.340.0070.08720.82
5.5.330.0070.08020.91
5.5.320.0070.08020.88
5.5.310.0070.07020.77
5.5.300.0000.04320.86
5.5.290.0070.05320.85
5.5.280.0070.08720.85
5.5.270.0130.07720.86
5.5.260.0100.04020.76
5.5.250.0100.05020.73
5.5.240.0130.07020.18
5.5.230.0100.08020.27
5.5.220.0070.04720.12
5.5.210.0100.07720.19
5.5.200.0000.08320.23
5.5.190.0070.05320.10
5.5.180.0130.03720.23
5.5.160.0000.04720.25
5.5.150.0030.06720.20
5.5.140.0000.04320.06
5.5.130.0030.05320.26
5.5.120.0030.04020.06
5.5.110.0070.03720.20
5.5.100.0030.04020.16
5.5.90.0070.05320.04
5.5.80.0100.03320.16
5.5.70.0070.03720.13
5.5.60.0000.04320.03
5.5.50.0030.03720.14
5.5.40.0100.08019.94
5.5.30.0030.04020.07
5.5.20.0100.03320.07
5.5.10.0030.04020.04
5.5.00.0030.08020.03
5.4.450.0070.03719.45
5.4.440.0100.08019.41
5.4.430.0100.06019.35
5.4.420.0170.06319.39
5.4.410.0030.07319.16
5.4.400.0130.06719.08
5.4.390.0130.05019.23
5.4.380.0100.07719.03
5.4.370.0230.06319.05
5.4.360.0070.07719.07
5.4.350.0030.08319.03
5.4.340.0000.04019.03
5.4.320.0000.04019.14
5.4.310.0130.05318.98
5.4.300.0030.03718.78
5.4.290.0070.04018.81
5.4.280.0000.04319.09
5.4.270.0000.04019.07
5.4.260.0030.03719.02
5.4.250.0070.05719.14
5.4.240.0070.03319.09
5.4.230.0130.02718.89
5.4.220.0100.03019.11
5.4.210.0070.03319.04
5.4.200.0070.04318.77
5.4.190.0070.06018.96
5.4.180.0070.03319.04
5.4.170.0030.03719.02
5.4.160.0070.03318.79
5.4.150.0030.03019.10
5.4.140.0000.04016.27
5.4.130.0000.04016.27
5.4.120.0070.02316.38
5.4.110.0000.07716.30
5.4.100.0000.03316.36
5.4.90.0000.03316.44
5.4.80.0030.03716.37
5.4.70.0030.03316.19
5.4.60.0030.06316.21
5.4.50.0030.02716.39
5.4.40.0030.03316.37
5.4.30.0070.03016.32
5.4.20.0030.03316.18
5.4.10.0000.03716.35
5.4.00.0000.03015.78
5.3.290.0070.08014.66
5.3.280.0030.04014.57
5.3.270.0000.04014.54
5.3.260.0030.04714.59
5.3.250.0000.04014.57
5.3.240.0000.03314.59
5.3.230.0000.04014.60
5.3.220.0030.02714.42
5.3.210.0030.03714.54
5.3.200.0000.03314.57
5.3.190.0030.03714.56
5.3.180.0000.05714.57
5.3.170.0030.03714.55
5.3.160.0030.03314.50
5.3.150.0030.03314.53
5.3.140.0000.03714.49
5.3.130.0000.07714.39
5.3.120.0000.03314.40
5.3.110.0000.03714.54
5.3.100.0070.02714.01
5.3.90.0000.03713.83
5.3.80.0030.03313.98
5.3.70.0030.03313.77
5.3.60.0000.05313.85
5.3.50.0000.03713.89
5.3.40.0030.03313.88
5.3.30.0000.04013.89
5.3.20.0030.07313.44
5.3.10.0030.03313.51
5.3.00.0030.04013.54
5.2.170.0030.02713.11
5.2.160.0000.03013.11
5.2.150.0030.02713.11
5.2.140.0000.06713.11
5.2.130.0030.06013.11
5.2.120.0030.06013.11
5.2.110.0000.05013.11
5.2.100.0000.06713.11
5.2.90.0030.03713.11
5.2.80.0000.04713.11
5.2.70.0000.04013.11
5.2.60.0070.04013.11
5.2.50.0000.06313.11
5.2.40.0030.06313.11
5.2.30.0030.04013.11
5.2.20.0000.05313.11
5.2.10.0070.06013.11
5.2.00.0070.05313.11
5.1.60.0030.05013.11
5.1.50.0030.05713.11
5.1.40.0030.04313.11
5.1.30.0000.04713.11
5.1.20.0000.05713.11
5.1.10.0030.05013.11
5.1.00.0100.04313.11
5.0.50.0030.04713.11
5.0.40.0030.04013.11
5.0.30.0000.07013.11
5.0.20.0030.04713.11
5.0.10.0000.04013.11
5.0.00.0030.05313.11
4.4.90.0070.03313.11
4.4.80.0000.02013.11
4.4.70.0000.02313.11
4.4.60.0000.02013.11
4.4.50.0000.03713.11
4.4.40.0030.05013.11
4.4.30.0030.03313.11
4.4.20.0070.02713.11
4.4.10.0030.03713.11
4.4.00.0030.05313.11
4.3.110.0030.03313.11
4.3.100.0000.03713.11
4.3.90.0030.03313.11
4.3.80.0030.03013.11
4.3.70.0000.03713.11
4.3.60.0000.02713.11
4.3.50.0000.03013.11
4.3.40.0030.05313.11
4.3.30.0070.02713.11
4.3.20.0000.03713.11
4.3.10.0000.04013.11
4.3.00.0030.03713.11

preferences:
62.4 ms | 401 KiB | 5 Q