3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = 'tst'; $b = array ( &$a => &$a ); $a = 'bnb'; echo $b['tst']; ?>

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)
5.4.320.0050.03712.50
5.4.310.0100.03712.50
5.4.300.0030.04012.50
5.4.290.0050.03912.49
5.4.280.0050.03612.39
5.4.270.0090.03212.39
5.4.260.0060.03612.39
5.4.250.0030.04012.39
5.4.240.0060.03612.39
5.4.230.0060.03712.38
5.4.220.0060.03612.38
5.4.210.0070.03412.38
5.4.200.0050.03812.38
5.4.190.0030.03812.38
5.4.180.0040.03712.38
5.4.170.0090.03212.39
5.4.160.0060.03512.38
5.4.150.0060.03512.38
5.4.140.0020.04012.07
5.4.130.0040.03812.05
5.4.120.0060.03512.02
5.4.110.0070.03412.01
5.4.100.0030.03712.01
5.4.90.0090.03312.01
5.4.80.0050.03912.01
5.4.70.0030.04512.01
5.4.60.0040.03612.01
5.4.50.0070.03712.01
5.4.40.0050.03612.00
5.4.30.0070.04211.99
5.4.20.0070.03411.98
5.4.10.0050.03611.99
5.4.00.0070.03911.48
5.3.290.0050.04012.80
5.3.280.0040.03912.71
5.3.270.0050.03812.72
5.3.260.0070.03712.72
5.3.250.0080.03412.72
5.3.240.0060.03712.72
5.3.230.0080.03412.71
5.3.220.0080.04112.68
5.3.210.0100.04112.68
5.3.200.0090.04112.68
5.3.190.0080.03812.68
5.3.180.0090.03412.67
5.3.170.0080.03412.66
5.3.160.0050.03712.67
5.3.150.0060.03812.67
5.3.140.0070.03612.66
5.3.130.0030.04212.65
5.3.120.0050.04012.66
5.3.110.0050.04212.66
5.3.100.0070.03612.12
5.3.90.0050.03712.08
5.3.80.0050.04112.07
5.3.70.0040.03812.07
5.3.60.0050.03712.06
5.3.50.0060.03612.00
5.3.40.0040.03812.00
5.3.30.0110.03611.95
5.3.20.0050.03811.72
5.3.10.0070.03411.70
5.3.00.0060.03611.68
5.2.170.0030.0329.18
5.2.160.0070.0269.18
5.2.150.0040.0309.18
5.2.140.0030.0329.18
5.2.130.0010.0329.14
5.2.120.0010.0329.14
5.2.110.0060.0289.14
5.2.100.0050.0279.14
5.2.90.0080.0269.14
5.2.80.0040.0309.14
5.2.70.0030.0319.14
5.2.60.0050.0299.09
5.2.50.0060.0289.06
5.2.40.0070.0269.04
5.2.30.0060.0289.01
5.2.20.0070.0259.01
5.2.10.0040.0338.93
5.2.00.0030.0318.78
5.1.60.0030.0258.06
5.1.50.0060.0238.06
5.1.40.0030.0288.05
5.1.30.0030.0278.40
5.1.20.0080.0278.42
5.1.10.0080.0248.14
5.1.00.0030.0268.14
5.0.50.0040.0196.62
5.0.40.0060.0216.48
5.0.30.0040.0326.29
5.0.20.0030.0206.26
5.0.10.0050.0186.24
5.0.00.0050.0306.23
4.4.90.0020.0164.78
4.4.80.0060.0124.75
4.4.70.0040.0144.75
4.4.60.0040.0144.75
4.4.50.0040.0134.77
4.4.40.0030.0254.70
4.4.30.0020.0164.76
4.4.20.0030.0194.85
4.4.10.0040.0194.85
4.4.00.0030.0254.76
4.3.110.0030.0154.67
4.3.100.0030.0154.66
4.3.90.0030.0144.63
4.3.80.0050.0224.59
4.3.70.0020.0154.63
4.3.60.0030.0144.63
4.3.50.0010.0174.63
4.3.40.0030.0254.54
4.3.30.0020.0163.29
4.3.20.0020.0163.27
4.3.10.0010.0173.22
4.3.00.0270.01718.41

preferences:
140.9 ms | 1394 KiB | 7 Q