3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = []; $b = & $a; $a['b' => $b]; var_dump($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)
5.4.350.0080.03312.01
5.4.340.0080.03612.01
5.4.320.0070.03812.49
5.4.310.0110.04212.49
5.4.300.0110.04012.50
5.4.290.0070.04612.50
5.4.280.0050.03712.39
5.4.270.0070.04412.39
5.4.260.0070.04312.39
5.4.250.0070.04112.39
5.4.240.0090.04012.39
5.4.230.0080.03812.38
5.4.220.0060.04212.38
5.4.210.0080.03712.38
5.4.200.0070.04012.38
5.4.190.0080.03712.38
5.4.180.0090.03912.38
5.4.170.0070.03612.38
5.4.160.0050.04112.38
5.4.150.0030.04612.38
5.4.140.0070.04812.07
5.4.130.0060.03712.05
5.4.120.0110.04412.01
5.4.110.0090.03912.01
5.4.100.0080.04312.01
5.4.90.0090.04612.01
5.4.80.0090.04512.01
5.4.70.0100.03312.01
5.4.60.0060.03712.01
5.4.50.0080.03512.00
5.4.40.0080.03512.00
5.4.30.0030.04011.99
5.4.20.0070.04311.99
5.4.10.0090.03711.99
5.4.00.0060.04011.48
5.3.290.0080.04212.80
5.3.280.0050.04912.71
5.3.270.0080.04512.73
5.3.260.0080.03912.72
5.3.250.0090.04812.72
5.3.240.0110.04712.72
5.3.230.0060.04212.71
5.3.220.0070.04012.68
5.3.210.0110.04612.68
5.3.200.0070.05212.68
5.3.190.0090.04612.68
5.3.180.0150.03312.68
5.3.170.0100.04412.67
5.3.160.0100.05012.68
5.3.150.0120.04212.68
5.3.140.0080.03712.66
5.3.130.0120.04212.66
5.3.120.0070.04512.66
5.3.110.0060.05412.66
5.3.100.0100.05012.12
5.3.90.0090.04912.08
5.3.80.0070.04812.08
5.3.70.0110.04712.07
5.3.60.0110.04612.06
5.3.50.0070.05112.00
5.3.40.0120.04912.00
5.3.30.0110.03811.95
5.3.20.0110.03511.73
5.3.10.0100.04011.70
5.3.00.0070.03811.68
5.2.170.0090.0349.18
5.2.160.0090.0379.18
5.2.150.0070.0429.18
5.2.140.0110.0369.18
5.2.130.0090.0389.14
5.2.120.0060.0399.14
5.2.110.0080.0399.14
5.2.100.0100.0309.14
5.2.90.0110.0329.14
5.2.80.0060.0339.14
5.2.70.0060.0319.14
5.2.60.0110.0329.09
5.2.50.0100.0369.05
5.2.40.0120.0609.03
5.2.30.0090.0289.02
5.2.20.0050.0299.00
5.2.10.0060.0278.92
5.2.00.0050.0348.78
5.1.60.0030.0268.06
5.1.50.0100.0228.06
5.1.40.0070.0228.05
5.1.30.0070.0298.39
5.1.20.0100.0268.41
5.1.10.0040.0278.14
5.1.00.0040.0318.14
5.0.50.0030.0266.63
5.0.40.0060.0176.48
5.0.30.0060.0296.29
5.0.20.0040.0196.27
5.0.10.0040.0206.24
5.0.00.0000.0376.23
4.4.90.0060.0184.78
4.4.80.0040.0174.76
4.4.70.0020.0164.75
4.4.60.0060.0204.76
4.4.50.0040.0214.77
4.4.40.0060.0304.71
4.4.30.0020.0164.75
4.4.20.0060.0144.84
4.4.10.0020.0184.85
4.4.00.0050.0294.76
4.3.110.0050.0184.66
4.3.100.0030.0164.67
4.3.90.0020.0154.64
4.3.80.0040.0244.58
4.3.70.0090.0104.63
4.3.60.0060.0144.63
4.3.50.0030.0164.63
4.3.40.0040.0254.54
4.3.30.0020.0163.28
4.3.20.0020.0173.26
4.3.10.0020.0163.22
4.3.00.0030.0236.75

preferences:
144.23 ms | 1394 KiB | 7 Q