3v4l.org

run code in 300+ PHP versions simultaneously
<?php function foo() { echo __FUNCTION__, "\n"; return 'key'; } echo "??=\n"; $array = []; $array[foo()] ??= 'default'; echo "\nrough equivalent\n"; $array = []; if (!isset($array[foo()])) { $array[foo()] = 'default'; }

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)
8.3.60.0060.01316.38
8.3.50.0100.00316.31
8.3.40.0110.00418.88
8.3.30.0140.00318.60
8.3.20.0070.00024.18
8.3.10.0030.00724.66
8.3.00.0040.00426.16
8.2.180.0070.01025.92
8.2.170.0070.01119.13
8.2.160.0100.00322.96
8.2.150.0040.00425.66
8.2.140.0000.00824.66
8.2.130.0040.00426.16
8.2.120.0080.00026.35
8.2.110.0030.00622.38
8.2.100.0150.00017.97
8.2.90.0000.00819.32
8.2.80.0030.00517.97
8.2.70.0040.00417.50
8.2.60.0050.00217.80
8.2.50.0040.00418.07
8.2.40.0030.00618.22
8.2.30.0000.00818.00
8.2.20.0030.00518.05
8.2.10.0080.00019.31
8.2.00.0000.00819.23
8.1.280.0120.00625.92
8.1.270.0070.00722.14
8.1.260.0050.00328.09
8.1.250.0040.00428.09
8.1.240.0040.00422.14
8.1.230.0110.00019.05
8.1.220.0040.00417.74
8.1.210.0080.00018.77
8.1.200.0000.00917.36
8.1.190.0000.00817.36
8.1.180.0090.00018.10
8.1.170.0040.00418.75
8.1.160.0000.00718.87
8.1.150.0030.00618.81
8.1.140.0040.00418.87
8.1.130.0030.00320.00
8.1.120.0040.00417.47
8.1.110.0040.00417.46
8.1.100.0000.00817.44
8.1.90.0020.00517.42
8.1.80.0030.00617.48
8.1.70.0030.00317.39
8.1.60.0000.00817.48
8.1.50.0060.00317.55
8.1.40.0030.00617.50
8.1.30.0000.00817.55
8.1.20.0030.00517.57
8.1.10.0000.00817.54
8.1.00.0030.00517.37
8.0.300.0060.00318.77
8.0.290.0040.00416.58
8.0.280.0030.00318.51
8.0.270.0070.00017.99
8.0.260.0000.00618.50
8.0.250.0040.00416.88
8.0.240.0040.00417.00
8.0.230.0070.00016.82
8.0.220.0000.00716.88
8.0.210.0050.00216.90
8.0.200.0000.00616.95
8.0.190.0000.00816.88
8.0.180.0040.00416.95
8.0.170.0000.00916.89
8.0.160.0050.00316.95
8.0.150.0000.00716.88
8.0.140.0070.00316.89
8.0.130.0030.00313.28
8.0.120.0040.00416.74
8.0.110.0040.00416.71
8.0.100.0020.00516.93
8.0.90.0050.00216.93
8.0.80.0060.00916.85
8.0.70.0050.00316.84
8.0.60.0040.00416.88
8.0.50.0040.00416.84
8.0.30.0000.01617.00
8.0.20.0170.00717.11
8.0.10.0160.00317.03
8.0.00.0060.01617.05
7.4.330.0000.00415.55
7.4.320.0000.00716.63
7.4.300.0060.00016.52
7.4.290.0070.00016.36
7.4.280.0000.00916.45
7.4.270.0040.00416.59
7.4.260.0000.00513.22
7.4.250.0050.00216.55
7.4.240.0030.00316.41
7.4.230.0040.00416.49
7.4.220.0040.00316.52
7.4.210.0090.00716.55
7.4.200.0050.00316.68
7.4.140.0090.00916.43
7.4.130.0070.01116.60
7.4.120.0100.01016.53
7.4.110.0070.01116.62
7.4.100.0130.01316.48
7.4.90.0100.00716.50
7.4.80.0080.00916.55
7.4.70.0040.01416.45
7.4.60.0180.00316.50
7.4.50.0120.00616.57
7.4.40.0090.01116.72
7.4.30.0030.01316.27
7.4.20.0060.01216.32
7.4.10.0120.00616.57
7.4.00.0130.00316.40
7.3.330.0030.00316.03
7.3.320.0050.00013.23
7.3.310.0000.00616.16
7.3.300.0020.00516.21
7.3.290.0070.00016.07
7.3.260.0230.00016.47
7.3.250.0130.00316.31
7.3.240.0120.00416.11
7.3.230.0070.01516.30
7.3.220.0100.01016.23
7.3.210.0060.01316.36
7.3.200.0100.00716.23
7.3.190.0130.00316.07
7.3.180.0160.00316.31
7.3.170.0100.00716.33
7.3.160.0070.01016.26
7.3.150.0090.00616.33
7.3.140.0110.00816.33
7.3.130.0100.00716.12
7.3.120.0090.00616.33
7.3.110.0100.01016.08
7.3.100.0060.01116.36
7.3.90.0070.01316.10
7.3.80.0110.00716.22
7.3.70.0060.01016.20
7.3.60.0060.01016.13
7.3.50.0060.01316.22
7.3.40.0110.00616.17
7.3.30.0110.00716.11
7.3.20.0100.00716.17
7.3.10.0090.00916.32
7.3.00.0150.00416.05

preferences:
67.29 ms | 401 KiB | 5 Q