3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = [1, 2, 3]; echo implode(',', $array), "\n";  foreach ($array as &$value) {}    // by reference echo implode(',', $array), "\n";   foreach ($array as $value) {}     // by value (i.e., copy) echo implode(',', $array), "\n";

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)
5.4.310.0040.04112.50
5.4.300.0060.03712.50
5.4.290.0060.04012.49
5.4.280.0060.03812.39
5.4.270.0120.03912.39
5.4.260.0050.05412.39
5.4.250.0110.04812.39
5.4.240.0050.03912.39
5.4.230.0060.04012.38
5.4.220.0090.03412.38
5.4.210.0050.03712.38
5.4.200.0040.04012.38
5.4.190.0070.03712.38
5.4.180.0080.03312.38
5.4.170.0060.03612.39
5.4.160.0110.03412.38
5.4.150.0070.03512.38
5.4.140.0060.03712.07
5.4.130.0030.03812.05
5.4.120.0050.03612.02
5.4.110.0080.03412.01
5.4.100.0070.03412.01
5.4.90.0050.03812.01
5.4.80.0060.03712.01
5.4.70.0080.03412.01
5.4.60.0070.04112.01
5.4.50.0080.03512.01
5.4.40.0100.03412.00
5.4.30.0070.04511.99
5.4.20.0060.03611.98
5.4.10.0060.03511.99
5.4.00.0070.03411.49
5.3.290.0060.04112.80
5.3.280.0040.04012.71
5.3.270.0080.03712.72
5.3.260.0080.04112.72
5.3.250.0050.04412.71
5.3.240.0090.03612.72
5.3.230.0080.03712.71
5.3.220.0050.04312.68
5.3.210.0090.04512.68
5.3.200.0070.04012.68
5.3.190.0070.04812.68
5.3.180.0050.03712.67
5.3.170.0070.03512.67
5.3.160.0070.03512.67
5.3.150.0050.04212.68
5.3.140.0060.04612.66
5.3.130.0050.05112.65
5.3.120.0100.04012.66
5.3.110.0030.04112.66
5.3.100.0040.03812.12
5.3.90.0050.03712.09
5.3.80.0050.03712.07
5.3.70.0070.04012.08
5.3.60.0100.03312.06
5.3.50.0080.03612.00
5.3.40.0090.04612.00
5.3.30.0060.03711.95
5.3.20.0080.04011.72
5.3.10.0040.03711.70
5.3.00.0090.03311.68
5.2.170.0060.0349.18
5.2.160.0070.0279.18
5.2.150.0040.0359.18
5.2.140.0040.0309.18
5.2.130.0060.0289.13
5.2.120.0060.0339.13
5.2.110.0070.0329.15
5.2.100.0070.0269.14
5.2.90.0060.0289.14
5.2.80.0070.0289.14
5.2.70.0040.0319.14
5.2.60.0080.0439.08
5.2.50.0060.0419.06
5.2.40.0020.0319.03
5.2.30.0070.0309.02
5.2.20.0070.0329.01
5.2.10.0080.0348.92
5.2.00.0060.0328.79
5.1.60.0070.0248.06
5.1.50.0060.0318.07
5.1.40.0060.0308.05
5.1.30.0060.0328.40
5.1.20.0060.0368.42
5.1.10.0020.0348.14
5.1.00.0080.0228.14
5.0.50.0050.0256.62
5.0.40.0040.0216.47
5.0.30.0060.0336.29
5.0.20.0050.0256.27
5.0.10.0040.0206.23
5.0.00.0080.0336.23
4.4.90.0050.0214.78
4.4.80.0060.0164.75
4.4.70.0030.0184.75
4.4.60.0080.0194.76
4.4.50.0020.0214.77
4.4.40.0030.0244.70
4.4.30.0040.0214.76
4.4.20.0060.0164.84
4.4.10.0040.0184.85
4.4.00.0050.0264.76
4.3.110.0040.0184.67
4.3.100.0020.0154.66
4.3.90.0040.0144.63
4.3.80.0030.0264.58
4.3.70.0020.0154.63
4.3.60.0020.0154.63
4.3.50.0040.0144.63
4.3.40.0030.0244.53
4.3.30.0020.0163.28
4.3.20.0040.0223.26
4.3.10.0040.0163.22
4.3.00.0030.01015.91

preferences:
139.2 ms | 1394 KiB | 7 Q