3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = new StdClass; $b = &$a; $c = &$b; unset $b; var_dump($a, $b, $c); ?>

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)
5.4.320.0060.03512.49
5.4.310.0060.03712.49
5.4.300.0080.03412.49
5.4.290.0030.04012.50
5.4.280.0070.03412.39
5.4.270.0070.04512.39
5.4.260.0070.04312.39
5.4.250.0050.03712.39
5.4.240.0070.03412.39
5.4.230.0080.03312.38
5.4.220.0050.03712.38
5.4.210.0050.03512.38
5.4.200.0060.03612.38
5.4.190.0020.03912.38
5.4.180.0050.03512.38
5.4.170.0060.03512.38
5.4.160.0060.03512.38
5.4.150.0090.04012.38
5.4.140.0060.03712.07
5.4.130.0030.03812.05
5.4.120.0030.03712.02
5.4.110.0070.03612.01
5.4.100.0130.04012.02
5.4.90.0080.03612.01
5.4.80.0040.03812.01
5.4.70.0050.03412.00
5.4.60.0040.03512.00
5.4.50.0060.03412.00
5.4.40.0070.03211.99
5.4.30.0070.03411.99
5.4.20.0070.03311.99
5.4.10.0070.03312.00
5.4.00.0080.03711.48
5.3.290.0100.03512.80
5.3.280.0050.03812.71
5.3.270.0070.03712.73
5.3.260.0040.04012.72
5.3.250.0060.03812.72
5.3.240.0020.04012.72
5.3.230.0040.03912.71
5.3.220.0060.03512.68
5.3.210.0090.03512.68
5.3.200.0050.03612.68
5.3.190.0050.03712.68
5.3.180.0080.03512.68
5.3.170.0090.03212.67
5.3.160.0040.03712.67
5.3.150.0050.03712.67
5.3.140.0070.03412.66
5.3.130.0080.03612.66
5.3.120.0040.04012.66
5.3.110.0060.03912.66
5.3.100.0090.04512.12
5.3.90.0070.03612.09
5.3.80.0040.03812.07
5.3.70.0050.03712.08
5.3.60.0060.03612.06
5.3.50.0050.03612.00
5.3.40.0010.04012.00
5.3.30.0060.03311.95
5.3.20.0050.03411.73
5.3.10.0060.03311.70
5.3.00.0040.03611.68
5.2.170.0050.0289.18
5.2.160.0050.0289.18
5.2.150.0040.0309.18
5.2.140.0050.0389.18
5.2.130.0050.0289.14
5.2.120.0060.0279.14
5.2.110.0040.0309.14
5.2.100.0070.0309.14
5.2.90.0040.0339.14
5.2.80.0050.0339.14
5.2.70.0030.0319.13
5.2.60.0070.0279.09
5.2.50.0030.0319.06
5.2.40.0050.0279.04
5.2.30.0020.0319.02
5.2.20.0060.0279.00
5.2.10.0040.0288.93
5.2.00.0050.0298.79
5.1.60.0030.0258.07
5.1.50.0060.0238.07
5.1.40.0050.0238.05
5.1.30.0040.0328.40
5.1.20.0030.0278.42
5.1.10.0100.0198.14
5.1.00.0020.0278.15
5.0.50.0050.0196.62
5.0.40.0030.0196.48
5.0.30.0030.0316.29
5.0.20.0020.0216.27
5.0.10.0030.0206.24
5.0.00.0040.0296.23
4.4.90.0040.0144.78
4.4.80.0020.0154.75
4.4.70.0040.0134.76
4.4.60.0040.0144.75
4.4.50.0020.0154.77
4.4.40.0020.0254.70
4.4.30.0030.0154.76
4.4.20.0010.0174.85
4.4.10.0060.0124.85
4.4.00.0040.0244.76
4.3.110.0030.0214.67
4.3.100.0020.0154.66
4.3.90.0030.0144.64
4.3.80.0000.0264.58
4.3.70.0040.0154.63
4.3.60.0020.0154.63
4.3.50.0020.0164.63
4.3.40.0020.0244.54
4.3.30.0010.0163.29
4.3.20.0010.0163.26
4.3.10.0010.0163.22
4.3.00.0000.02015.68

preferences:
136.1 ms | 1398 KiB | 7 Q