3v4l.org

run code in 300+ PHP versions simultaneously
<?php $blah = array('a' => ''); echo isset($blah('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)
5.4.320.0060.03512.46
5.4.310.0040.04012.46
5.4.300.0040.03812.46
5.4.290.0080.03612.46
5.4.280.0050.03612.36
5.4.270.0060.03612.36
5.4.260.0090.03512.36
5.4.250.0050.03912.36
5.4.240.0070.03512.36
5.4.230.0050.03812.35
5.4.220.0050.03712.35
5.4.210.0040.03712.35
5.4.200.0070.03612.35
5.4.190.0090.03312.35
5.4.180.0070.03412.35
5.4.170.0070.03512.36
5.4.160.0030.03912.35
5.4.150.0060.03612.35
5.4.140.0060.03712.03
5.4.130.0060.03512.02
5.4.120.0040.03611.98
5.4.110.0040.03711.98
5.4.100.0030.03811.98
5.4.90.0060.04111.98
5.4.80.0060.04111.98
5.4.70.0060.03511.97
5.4.60.0070.03311.97
5.4.50.0080.05611.97
5.4.40.0070.03411.96
5.4.30.0070.03511.96
5.4.20.0040.03711.96
5.4.10.0020.03711.96
5.4.00.0040.03811.45
5.3.290.0080.03712.80
5.3.280.0040.03912.71
5.3.270.0070.03712.73
5.3.260.0090.04212.72
5.3.250.0060.04412.72
5.3.240.0030.04012.72
5.3.230.0050.03912.71
5.3.220.0050.03812.68
5.3.210.0080.04912.68
5.3.200.0070.04412.68
5.3.190.0060.04112.68
5.3.180.0060.04012.67
5.3.170.0110.03112.67
5.3.160.0070.03612.67
5.3.150.0080.03612.67
5.3.140.0060.03612.66
5.3.130.0070.03812.65
5.3.120.0030.04112.66
5.3.110.0060.04612.66
5.3.100.0080.03412.12
5.3.90.0050.03712.08
5.3.80.0030.03912.08
5.3.70.0040.03812.07
5.3.60.0060.03612.06
5.3.50.0060.03512.00
5.3.40.0070.03412.00
5.3.30.0070.03211.95
5.3.20.0080.03211.72
5.3.10.0050.03711.69
5.3.00.0030.03911.68
5.2.170.0050.0309.18
5.2.160.0060.0379.18
5.2.150.0020.0419.18
5.2.140.0040.0309.17
5.2.130.0050.0289.13
5.2.120.0060.0269.13
5.2.110.0080.0329.14
5.2.100.0060.0269.14
5.2.90.0060.0279.14
5.2.80.0040.0309.14
5.2.70.0030.0329.13
5.2.60.0060.0299.09
5.2.50.0060.0289.06
5.2.40.0030.0299.04
5.2.30.0030.0309.01
5.2.20.0030.0329.00
5.2.10.0080.0238.93
5.2.00.0070.0268.78
5.1.60.0040.0248.06
5.1.50.0050.0248.06
5.1.40.0040.0248.04
5.1.30.0050.0328.39
5.1.20.0000.0318.41
5.1.10.0030.0268.14
5.1.00.0060.0248.14
5.0.50.0030.0216.61
5.0.40.0040.0196.48
5.0.30.0040.0306.29
5.0.20.0060.0166.26
5.0.10.0030.0206.24
5.0.00.0030.0326.23
4.4.90.0010.0174.78
4.4.80.0030.0144.76
4.4.70.0030.0154.75
4.4.60.0030.0154.75
4.4.50.0030.0144.77
4.4.40.0010.0264.71
4.4.30.0010.0174.76
4.4.20.0030.0154.85
4.4.10.0050.0134.85
4.4.00.0040.0234.76
4.3.110.0030.0154.67
4.3.100.0030.0154.66
4.3.90.0020.0154.64
4.3.80.0010.0264.58
4.3.70.0020.0144.63
4.3.60.0020.0154.63
4.3.50.0010.0184.63
4.3.40.0010.0254.54
4.3.30.0020.0173.29
4.3.20.0020.0163.27
4.3.10.0020.0153.22
4.3.00.0170.0206.95

preferences:
140.71 ms | 1394 KiB | 7 Q