3v4l.org

run code in 300+ PHP versions simultaneously
<?php $undef; $undef2 = null; $undef3 = null; unset($undef3); echo '$undef === $undef2?'; var_dump($undef === $undef2); echo '$undef === $undef3?'; var_dump($unedf === $undef3); echo '$undef2 === $undef3?'; var_dump($undef2 === $undef3);

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)
8.3.40.0170.00318.65
8.3.30.0090.00618.84
8.3.20.0070.00720.29
8.3.10.0040.00421.90
8.3.00.0050.00319.42
8.2.170.0110.00322.96
8.2.160.0000.01420.39
8.2.150.0040.00424.18
8.2.140.0130.00724.66
8.2.130.0070.00026.16
8.2.120.0040.00420.96
8.2.110.0090.00022.10
8.2.100.0090.00317.63
8.2.90.0030.00619.07
8.2.80.0060.00317.97
8.2.70.0060.00317.75
8.2.60.0080.00017.79
8.2.50.0030.00518.07
8.2.40.0040.00419.28
8.2.30.0040.00419.66
8.2.20.0040.00417.74
8.2.10.0050.00317.90
8.2.00.0000.00818.05
8.1.270.0050.00320.43
8.1.260.0050.00226.35
8.1.250.0070.00028.09
8.1.240.0060.00322.38
8.1.230.0080.00417.48
8.1.220.0040.00717.74
8.1.210.0000.00818.77
8.1.200.0070.00417.23
8.1.190.0000.00816.85
8.1.180.0070.00018.10
8.1.170.0030.00518.44
8.1.160.0000.00721.86
8.1.150.0030.00718.73
8.1.140.0050.00317.43
8.1.130.0030.00317.63
8.1.120.0030.00317.39
8.1.110.0050.00217.42
8.1.100.0000.00817.36
8.1.90.0050.00217.38
8.1.80.0080.00017.38
8.1.70.0040.00417.39
8.1.60.0060.00317.54
8.1.50.0070.00017.40
8.1.40.0050.00317.33
8.1.30.0000.00917.61
8.1.20.0030.00517.63
8.1.10.0040.00417.52
8.1.00.0000.00817.33
8.0.300.0040.00418.77
8.0.290.0000.00716.75
8.0.280.0050.00318.37
8.0.270.0050.00217.19
8.0.260.0000.00617.24
8.0.250.0000.00816.93
8.0.240.0040.00416.86
8.0.230.0030.00316.91
8.0.220.0040.00416.90
8.0.210.0030.00516.89
8.0.200.0030.00316.93
8.0.190.0060.00316.90
8.0.180.0040.00416.79
8.0.170.0000.00716.82
8.0.160.0000.00716.80
8.0.150.0040.00416.91
8.0.140.0030.00516.82
8.0.130.0030.00313.33
8.0.120.0030.00616.86
8.0.110.0040.00416.80
8.0.100.0000.00716.85
8.0.90.0070.00016.88
8.0.80.0070.01016.84
8.0.70.0070.00016.93
8.0.60.0000.00716.73
8.0.50.0050.00216.74
8.0.30.0140.00717.07
8.0.20.0080.01117.40
8.0.10.0040.00416.88
8.0.00.0080.01016.51
7.4.330.0020.00215.08
7.4.320.0000.00716.54
7.4.300.0060.00016.52
7.4.290.0040.00416.60
7.4.280.0090.00016.50
7.4.270.0030.00316.54
7.4.260.0030.00316.47
7.4.250.0000.00816.47
7.4.240.0010.00616.54
7.4.230.0030.00316.34
7.4.220.0040.01516.54
7.4.210.0080.00816.53
7.4.200.0040.00416.35
7.4.160.0080.00816.58
7.4.150.0060.01217.40
7.4.140.0160.00817.86
7.4.130.0110.00716.60
7.4.120.0110.00816.54
7.4.110.0040.01316.64
7.4.100.0070.01416.42
7.4.90.0100.00616.44
7.4.80.0040.01219.39
7.4.70.0110.00616.38
7.4.60.0100.00616.56
7.4.50.0040.00416.41
7.4.40.0030.01316.57
7.4.30.0070.01016.57
7.4.00.0030.01415.21
7.3.330.0000.00513.11
7.3.320.0000.00613.10
7.3.310.0000.00716.33
7.3.300.0000.00716.17
7.3.290.0000.00616.29
7.3.280.0140.00716.24
7.3.270.0100.01017.40
7.3.260.0170.00016.23
7.3.250.0070.01116.42
7.3.240.0140.00316.53
7.3.230.0090.01216.45
7.3.210.0050.01116.23
7.3.200.0080.00916.38
7.3.190.0060.01216.20
7.3.180.0060.01316.47
7.3.170.0060.01516.29
7.3.160.0100.00616.29
7.2.330.0030.01616.48
7.2.320.0070.01016.61
7.2.310.0060.01216.63
7.2.300.0110.00816.54
7.2.290.0090.00616.68
7.2.80.0030.00916.63
7.2.60.0030.01216.58
7.2.00.0030.01219.37
7.1.200.0000.01515.63
7.1.100.0050.00518.13
7.1.70.0040.00416.80
7.1.60.0110.01520.03
7.1.50.0130.00616.92
7.1.00.0030.07722.37
7.0.200.0370.00414.71
7.0.60.0100.04319.91
7.0.50.0070.04017.82
7.0.40.0200.05019.91
7.0.30.0230.08020.25
7.0.20.0100.04720.17
7.0.10.0030.06020.18
7.0.00.0070.04720.04
5.6.280.0070.03320.89
5.6.210.0100.07020.68
5.6.200.0030.04018.16
5.6.190.0170.06320.67
5.6.180.4000.04720.35
5.6.170.0330.07020.33
5.6.160.0030.05320.40
5.6.150.0100.07718.12
5.6.140.0030.04018.22
5.6.130.0030.05718.18
5.6.120.0030.05320.98
5.6.110.0130.08321.03
5.6.100.0100.05020.98
5.6.90.0070.08020.98
5.6.80.0130.07720.49
5.6.70.4200.03720.36
5.5.350.0100.08720.45
5.5.340.0000.05317.89
5.5.330.0130.05020.37
5.5.320.3300.04320.29
5.5.310.0370.04720.24
5.5.300.0100.06718.01
5.5.290.0100.06017.90
5.5.280.0100.08320.86
5.5.270.0170.07720.81
5.5.260.0070.05720.64
5.5.250.0070.06020.61
5.5.240.0200.07320.23
5.4.450.0630.05319.48
5.4.440.0500.05319.58
5.4.430.0400.06019.63
5.4.420.0530.05319.48
5.4.410.0430.05318.97
5.4.400.0400.05719.06
5.4.390.0270.06319.21
5.4.380.0100.05019.30
5.4.370.0300.04719.26
5.4.360.0330.05719.13
5.4.350.0370.04719.25
5.4.340.0270.05019.29
5.4.320.0270.05318.75
5.4.310.0470.05019.21
5.4.300.0500.05018.89
5.4.290.0700.06319.31
5.4.280.0200.06019.29
5.4.270.0470.05319.08
5.4.260.0500.06019.25
5.4.250.0470.05719.30
5.4.240.0500.05318.75
5.4.230.0730.04718.78
5.4.220.0700.05019.29
5.4.210.0730.05319.07
5.4.200.0500.06319.25
5.4.190.0630.05719.29
5.4.180.0600.04719.07
5.4.170.0530.05018.75
5.4.160.0570.06019.03
5.4.150.0630.05318.73
5.4.140.0600.05716.25
5.4.130.0500.05016.25
5.4.120.0630.04716.48
5.4.110.0630.04316.54
5.4.100.0600.04716.46
5.4.90.0600.05016.44
5.4.80.0670.05316.16
5.4.70.0070.07016.37
5.4.60.0330.04316.20
5.4.50.0070.03016.41
5.4.40.0130.07016.27
5.4.30.0330.02716.43
5.4.20.0370.04716.46

preferences:
42.74 ms | 400 KiB | 5 Q