3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo = null; $name = 'this'; var_dump(array($$name)); var_dump(array(isset($$name) ? &$$name : $$name));

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)
5.4.260.0050.03812.36
5.4.250.0090.03612.36
5.4.240.0050.04012.36
5.4.230.0080.04112.35
5.4.220.0050.03812.35
5.4.210.0050.03712.36
5.4.200.0090.03612.35
5.4.190.0040.03812.35
5.4.180.0040.03912.35
5.4.170.0050.03712.36
5.4.160.0070.03512.35
5.4.150.0050.03712.35
5.4.140.0040.03912.04
5.4.130.0060.03612.02
5.4.120.0060.04211.98
5.4.110.0060.04111.98
5.4.100.0070.03811.98
5.4.90.0080.04111.98
5.4.80.0070.04111.98
5.4.70.0090.03611.98
5.4.60.0040.03811.98
5.4.50.0070.03811.98
5.4.40.0050.04311.96
5.4.30.0050.04111.96
5.4.20.0070.03511.96
5.4.10.0040.03611.96
5.4.00.0040.04311.46
5.3.280.0070.04712.71
5.3.270.0070.04312.72
5.3.260.0080.04112.72
5.3.250.0080.04112.72
5.3.240.0070.04712.72
5.3.230.0070.04512.71
5.3.220.0050.04312.68
5.3.210.0070.04512.68
5.3.200.0090.03912.68
5.3.190.0080.03712.68
5.3.180.0070.03812.67
5.3.170.0070.04412.67
5.3.160.0060.03712.67
5.3.150.0080.03812.68
5.3.140.0050.03612.66
5.3.130.0050.03912.66
5.3.120.0050.03812.66
5.3.110.0080.03812.66
5.3.100.0090.03412.12
5.3.90.0050.04012.08
5.3.80.0050.03712.08
5.3.70.0050.04512.07
5.3.60.0040.03712.06
5.3.50.0080.03412.00
5.3.40.0050.03912.00
5.3.30.0100.03511.94
5.3.20.0070.04011.70
5.3.10.0060.03511.65
5.3.00.0040.04411.64
5.2.170.0090.0419.14
5.2.160.0050.0369.14
5.2.150.0050.0309.14
5.2.140.0060.0459.14
5.2.130.0070.0279.10
5.2.120.0050.0349.10
5.2.110.0070.0339.11
5.2.100.0060.0309.11
5.2.90.0040.0399.10
5.2.80.0030.0369.10
5.2.70.0040.0319.09
5.2.60.0040.0329.05
5.2.50.0050.0319.02
5.2.40.0060.0278.99
5.2.30.0060.0348.97
5.2.20.0070.0368.96
5.2.10.0040.0298.88
5.2.00.0070.0278.74
5.1.60.0020.0288.03
5.1.50.0060.0238.03
5.1.40.0040.0258.02
5.1.30.0050.0278.35
5.1.20.0060.0278.38
5.1.10.0050.0308.11
5.1.00.0070.0348.10
5.0.50.0070.0226.58
5.0.40.0040.0216.44
5.0.30.0040.0326.26
5.0.20.0020.0226.23
5.0.10.0040.0236.21
5.0.00.0050.0336.20
4.4.90.0020.0204.78
4.4.80.0020.0204.75
4.4.70.0040.0184.75
4.4.60.0040.0164.76
4.4.50.0040.0164.77
4.4.40.0030.0284.71
4.4.30.0040.0154.76
4.4.20.0030.0164.84
4.4.10.0040.0154.85
4.4.00.0040.0244.76
4.3.110.0020.0164.67
4.3.100.0040.0144.66
4.3.90.0020.0144.63
4.3.80.0020.0254.58
4.3.70.0040.0144.63
4.3.60.0020.0144.63
4.3.50.0040.0184.63
4.3.40.0030.0274.54
4.3.30.0020.0173.27
4.3.20.0040.0183.25
4.3.10.0040.0143.21
4.3.00.0100.0207.94

preferences:
143.75 ms | 1394 KiB | 7 Q