3v4l.org

run code in 300+ PHP versions simultaneously
<?php $z['a'] = 'a'; var_dump ($z['b']); var_dump ($z['b'] ?? null); var_dump ($z['b'] ?? 'b');

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)
8.3.70.0140.00718.68
8.3.60.0090.00918.55
8.3.50.0170.00318.16
8.3.40.0150.00018.73
8.3.30.0070.01418.64
8.3.20.0080.00019.20
8.3.10.0040.00421.94
8.3.00.0050.00319.81
8.2.190.0110.00716.88
8.2.180.0070.00718.23
8.2.170.0040.01222.96
8.2.160.0070.00720.38
8.2.150.0060.00324.18
8.2.140.0120.00624.66
8.2.130.0070.00719.72
8.2.120.0140.00426.35
8.2.110.0060.00320.92
8.2.100.0040.00817.97
8.2.90.0000.00818.03
8.2.80.0030.00617.97
8.2.70.0000.00817.79
8.2.60.0040.00418.03
8.2.50.0040.00418.10
8.2.40.0040.00419.22
8.2.30.0030.00521.34
8.2.20.0040.00417.94
8.2.10.0040.00418.16
8.2.00.0070.00019.30
8.1.280.0100.01025.92
8.1.270.0050.00222.13
8.1.260.0020.00526.35
8.1.250.0060.00628.09
8.1.240.0060.00323.82
8.1.230.0090.00322.63
8.1.220.0000.00917.76
8.1.210.0060.00618.77
8.1.200.0060.00617.35
8.1.190.0080.00016.99
8.1.180.0000.00818.10
8.1.170.0030.00618.57
8.1.160.0030.00618.66
8.1.150.0060.00318.77
8.1.140.0030.00519.23
8.1.130.0000.00718.86
8.1.120.0040.00417.23
8.1.110.0030.00617.32
8.1.100.0000.00717.26
8.1.90.0040.00417.30
8.1.80.0000.00917.32
8.1.70.0000.01017.38
8.1.60.0040.00417.54
8.1.50.0030.00517.44
8.1.40.0030.00617.35
8.1.30.0000.00717.55
8.1.20.0040.00417.63
8.1.10.0040.00417.45
8.1.00.0040.00417.35
8.0.300.0000.00719.77
8.0.290.0080.00016.58
8.0.280.0040.00418.25
8.0.270.0030.00617.13
8.0.260.0110.00017.03
8.0.250.0030.00616.89
8.0.240.0030.00316.96
8.0.230.0070.00016.89
8.0.220.0060.00316.81
8.0.210.0040.00416.85
8.0.200.0000.00616.78
8.0.190.0060.00316.76
8.0.180.0000.00716.91
8.0.170.0050.00216.83
8.0.160.0030.00616.90
8.0.150.0040.00416.74
8.0.140.0030.00316.77
8.0.130.0030.00313.27
8.0.120.0030.00616.66
8.0.110.0070.00316.84
8.0.100.0070.00016.82
8.0.90.0030.00316.86
8.0.80.0040.01116.78
8.0.70.0040.00416.69
8.0.60.0000.00716.80
8.0.50.0000.00716.87
8.0.30.0120.00617.12
8.0.20.0130.00817.40
8.0.10.0040.00417.00
8.0.00.0090.00816.80
7.4.330.0030.00315.55
7.4.320.0060.00016.45
7.4.300.0030.00316.52
7.4.290.0030.00316.50
7.4.280.0000.00816.56
7.4.270.0000.00616.45
7.4.260.0030.00316.53
7.4.250.0030.00316.52
7.4.240.0070.00016.43
7.4.230.0000.00616.51
7.4.220.0050.00316.44
7.4.210.0090.00816.56
7.4.200.0000.00716.52
7.4.160.0090.00816.45
7.4.140.0090.00917.86
7.4.130.0150.00316.47
7.4.120.0080.01016.59
7.4.110.0190.00016.54
7.4.100.0090.00916.42
7.4.90.0040.01216.48
7.4.80.0170.00719.39
7.4.70.0100.00616.57
7.4.60.0030.01216.50
7.4.50.0040.01216.17
7.4.40.0070.01316.41
7.4.00.0040.01214.98
7.3.330.0060.00013.13
7.3.320.0030.00313.10
7.3.310.0030.00516.11
7.3.300.0070.00016.30
7.3.290.0000.00816.37
7.3.280.0050.01316.31
7.3.260.0110.00816.48
7.3.240.0090.00816.26
7.3.230.0030.01716.25
7.3.210.0120.00916.34
7.3.200.0090.00916.53
7.3.190.0100.01016.30
7.3.180.0090.00816.42
7.3.170.0070.01016.17
7.3.160.0090.00816.24
7.2.330.0130.00716.38
7.2.320.0180.00316.56
7.2.310.0120.00616.34
7.2.300.0060.01616.29
7.2.290.0100.01316.63
7.2.60.0090.00916.64
7.2.50.0100.00316.90
7.2.40.1030.01417.63
7.2.30.0980.01417.68
7.2.20.0840.00717.89
7.2.10.1160.01517.82
7.2.00.0730.01017.83
7.1.200.0060.00915.96
7.1.160.1210.00816.62
7.1.150.0950.01216.73
7.1.140.0970.01116.92
7.1.130.0890.00716.80
7.1.120.0820.00916.57
7.1.110.0890.00915.56
7.1.100.0970.01016.18
7.1.90.0820.00915.78
7.1.80.0840.00916.21
7.1.70.0730.00715.36
7.1.60.1110.01333.16
7.1.50.1090.01632.75
7.1.40.0940.01532.60
7.1.30.1040.01832.64
7.1.20.1880.01732.51
7.1.10.0830.00914.68
7.1.00.0850.01015.02

preferences:
99.96 ms | 401 KiB | 5 Q