3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = array('a' => 1, 'b' => 2); foreach($arr as &$k=>$v) $k = strtoupper($k); var_dump($arr);

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)
5.4.320.0060.04112.47
5.4.310.0030.04112.46
5.4.300.0070.03712.47
5.4.290.0050.03812.46
5.4.280.0110.03212.36
5.4.270.0070.03712.36
5.4.260.0070.03912.36
5.4.250.0070.03812.36
5.4.240.0050.04912.36
5.4.230.0090.03812.35
5.4.220.0020.04112.35
5.4.210.0050.04012.35
5.4.200.0050.03912.35
5.4.190.0040.03812.34
5.4.180.0070.03512.35
5.4.170.0060.03512.36
5.4.160.0070.03512.35
5.4.150.0060.03512.35
5.4.140.0080.04012.04
5.4.130.0050.03712.02
5.4.120.0040.03711.98
5.4.110.0050.03711.98
5.4.100.0040.03611.97
5.4.90.0040.04011.98
5.4.80.0060.03911.97
5.4.70.0070.03611.97
5.4.60.0070.03511.98
5.4.50.0050.03611.97
5.4.40.0040.03611.96
5.4.30.0060.03911.96
5.4.20.0080.04411.95
5.4.10.0110.03811.96
5.4.00.0060.03811.45
5.3.290.0090.04212.80
5.3.280.0070.03712.71
5.3.270.0130.03512.73
5.3.260.0100.04612.72
5.3.250.0100.04012.72
5.3.240.0090.03212.72
5.3.230.0060.04012.71
5.3.220.0050.04212.68
5.3.210.0070.04112.68
5.3.200.0060.03712.68
5.3.190.0080.04112.68
5.3.180.0110.04512.67
5.3.170.0070.04212.67
5.3.160.0080.04312.68
5.3.150.0060.03912.67
5.3.140.0050.03812.66
5.3.130.0050.04112.65
5.3.120.0110.04212.66
5.3.110.0060.03912.66
5.3.100.0060.03812.12
5.3.90.0080.03512.08
5.3.80.0020.04212.07
5.3.70.0110.03612.07
5.3.60.0040.03812.07
5.3.50.0060.03712.00
5.3.40.0060.04012.00
5.3.30.0030.03811.94
5.3.20.0080.03411.73
5.3.10.0050.04011.70
5.3.00.0050.03811.68
5.2.170.0060.0289.18
5.2.160.0060.0279.18
5.2.150.0080.0279.18
5.2.140.0030.0409.17
5.2.130.0050.0299.14
5.2.120.0050.0289.13
5.2.110.0050.0299.14
5.2.100.0050.0289.14
5.2.90.0020.0329.14
5.2.80.0040.0309.14
5.2.70.0030.0319.14
5.2.60.0060.0389.09
5.2.50.0040.0329.06
5.2.40.0040.0369.04
5.2.30.0040.0299.01
5.2.20.0050.0449.00
5.2.10.0070.0348.92
5.2.00.0020.0318.77
5.1.60.0050.0238.06
5.1.50.0040.0258.06
5.1.40.0030.0258.05
5.1.30.0050.0258.40
5.1.20.0050.0298.41
5.1.10.0030.0368.13
5.1.00.0040.0308.14
5.0.50.0040.0196.61
5.0.40.0040.0196.48
5.0.30.0040.0316.29
5.0.20.0040.0186.26
5.0.10.0050.0186.23
5.0.00.0020.0316.23
4.4.90.0020.0154.78
4.4.80.0010.0164.76
4.4.70.0030.0154.75
4.4.60.0010.0164.76
4.4.50.0030.0144.77
4.4.40.0030.0244.71
4.4.30.0030.0144.76
4.4.20.0020.0164.84
4.4.10.0010.0174.85
4.4.00.0010.0264.76
4.3.110.0030.0154.67
4.3.100.0040.0144.67
4.3.90.0020.0154.63
4.3.80.0030.0254.58
4.3.70.0000.0174.63
4.3.60.0020.0144.63
4.3.50.0050.0124.63
4.3.40.0000.0264.54
4.3.30.0020.0153.29
4.3.20.0030.0153.27
4.3.10.0010.0163.21
4.3.00.0230.01019.45

preferences:
152.29 ms | 1394 KiB | 7 Q