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)
5.4.320.0050.03812.49
5.4.310.0090.03912.49
5.4.300.0050.04112.50
5.4.290.0070.03612.50
5.4.280.0070.03312.39
5.4.270.0060.03512.39
5.4.260.0040.04112.39
5.4.250.0010.04112.39
5.4.240.0090.03512.39
5.4.230.0050.04212.38
5.4.220.0080.03312.38
5.4.210.0080.03212.38
5.4.200.0100.03512.38
5.4.190.0030.04812.38
5.4.180.0080.03912.38
5.4.170.0060.04112.39
5.4.160.0020.03812.38
5.4.150.0080.03812.38
5.4.140.0040.03812.07
5.4.130.0050.03612.05
5.4.120.0040.03612.01
5.4.110.0090.03912.01
5.4.100.0100.03412.01
5.4.90.0080.03412.01
5.4.80.0070.03412.01
5.4.70.0060.03312.01
5.4.60.0020.03812.01
5.4.50.0070.03312.01
5.4.40.0050.04512.00
5.4.30.0040.03711.99
5.4.20.0070.03211.99
5.4.10.0020.03711.99
5.4.00.0050.03811.48
5.3.290.0070.04012.80
5.3.280.0050.03812.71
5.3.270.0080.03512.72
5.3.260.0070.04112.72
5.3.250.0050.03812.72
5.3.240.0080.03612.72
5.3.230.0090.03512.71
5.3.220.0130.03112.68
5.3.210.0060.04012.68
5.3.200.0070.03512.68
5.3.190.0060.03812.68
5.3.180.0070.03612.67
5.3.170.0050.03712.67
5.3.160.0060.03812.67
5.3.150.0060.03912.67
5.3.140.0030.04012.66
5.3.130.0040.04012.66
5.3.120.0060.04812.66
5.3.110.0040.03912.66
5.3.100.0080.03312.12
5.3.90.0040.03712.08
5.3.80.0060.03512.07
5.3.70.0040.03612.08
5.3.60.0020.03912.06
5.3.50.0070.03412.00
5.3.40.0020.03812.00
5.3.30.0080.03111.95
5.3.20.0050.03511.73
5.3.10.0030.03711.70
5.3.00.0060.03511.68
5.2.170.0030.0319.18
5.2.160.0040.0299.18
5.2.150.0030.0319.18
5.2.140.0030.0319.18
5.2.130.0020.0319.14
5.2.120.0030.0299.14
5.2.110.0060.0279.15
5.2.100.0060.0269.14
5.2.90.0030.0319.14
5.2.80.0020.0339.14
5.2.70.0050.0299.14
5.2.60.0040.0309.09
5.2.50.0030.0309.06
5.2.40.0020.0299.04
5.2.30.0050.0299.01
5.2.20.0040.0289.00
5.2.10.0060.0288.92
5.2.00.0020.0318.78
5.1.60.0050.0238.06
5.1.50.0030.0258.06
5.1.40.0020.0268.05
5.1.30.0020.0308.40
5.1.20.0060.0238.41
5.1.10.0030.0268.14
5.1.00.0040.0248.14
5.0.50.0060.0176.62
5.0.40.0060.0156.48
5.0.30.0040.0296.29
5.0.20.0020.0206.27
5.0.10.0030.0206.24
5.0.00.0020.0316.23
4.4.90.0040.0144.78
4.4.80.0040.0144.76
4.4.70.0020.0164.76
4.4.60.0010.0204.75
4.4.50.0040.0184.77
4.4.40.0060.0264.71
4.4.30.0030.0204.76
4.4.20.0020.0234.84
4.4.10.0030.0154.85
4.4.00.0020.0254.76
4.3.110.0010.0174.67
4.3.100.0030.0174.66
4.3.90.0070.0164.63
4.3.80.0030.0244.58
4.3.70.0040.0174.63
4.3.60.0050.0164.63
4.3.50.0030.0154.63
4.3.40.0030.0244.54
4.3.30.0030.0163.29
4.3.20.0020.0193.26
4.3.10.0030.0163.21
4.3.00.0200.01318.41

preferences:
146.42 ms | 1394 KiB | 7 Q