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)
5.4.310.0070.04012.49
5.4.300.0050.03712.50
5.4.290.0040.03912.49
5.4.280.0040.03612.39
5.4.270.0070.04012.39
5.4.260.0070.04012.39
5.4.250.0090.03412.39
5.4.240.0150.03912.39
5.4.230.0070.03912.38
5.4.220.0090.04712.38
5.4.210.0080.04212.38
5.4.200.0060.04312.38
5.4.190.0080.03612.38
5.4.180.0100.03612.38
5.4.170.0100.04112.38
5.4.160.0080.03312.38
5.4.150.0050.04312.38
5.4.140.0070.04612.07
5.4.130.0040.03712.05
5.4.120.0040.04412.02
5.4.110.0070.04412.01
5.4.100.0070.03312.01
5.4.90.0080.03412.01
5.4.80.0080.04512.01
5.4.70.0060.03712.01
5.4.60.0060.03412.01
5.4.50.0030.03812.01
5.4.40.0020.03811.99
5.4.30.0090.03212.00
5.4.20.0060.03511.98
5.4.10.0070.03311.99
5.4.00.0060.03611.48
5.3.290.0090.04112.80
5.3.280.0080.03612.71
5.3.270.0070.04512.73
5.3.260.0100.03912.72
5.3.250.0090.04212.72
5.3.240.0060.04612.72
5.3.230.0120.03612.71
5.3.220.0050.04112.68
5.3.210.0070.04712.68
5.3.200.0100.03412.68
5.3.190.0110.03512.67
5.3.180.0090.03412.68
5.3.170.0080.04212.67
5.3.160.0080.03512.67
5.3.150.0130.04812.68
5.3.140.0070.03712.66
5.3.130.0060.04512.66
5.3.120.0120.04012.66
5.3.110.0080.03712.66
5.3.100.0050.03812.12
5.3.90.0080.03612.08
5.3.80.0050.04112.07
5.3.70.0080.03712.07
5.3.60.0040.03912.07
5.3.50.0060.04412.00
5.3.40.0080.04312.00
5.3.30.0080.03411.95
5.3.20.0070.03611.73
5.3.10.0090.03411.70
5.3.00.0050.03811.68
5.2.170.0070.0399.18
5.2.160.0050.0299.18
5.2.150.0050.0349.18
5.2.140.0070.0299.18
5.2.130.0070.0329.14
5.2.120.0050.0319.14
5.2.110.0050.0309.14
5.2.100.0020.0329.14
5.2.90.0050.0309.14
5.2.80.0070.0319.14
5.2.70.0040.0339.14
5.2.60.0020.0339.09
5.2.50.0040.0329.05
5.2.40.0040.0349.03
5.2.30.0030.0339.02
5.2.20.0040.0309.00
5.2.10.0090.0288.92
5.2.00.0040.0318.78
5.1.60.0070.0258.07
5.1.50.0060.0298.06
5.1.40.0030.0338.05
5.1.30.0100.0258.40
5.1.20.0050.0318.41
5.1.10.0070.0278.14
5.1.00.0060.0378.14
5.0.50.0050.0206.63
5.0.40.0050.0266.48
5.0.30.0020.0366.29
5.0.20.0040.0226.26
5.0.10.0020.0286.24
5.0.00.0050.0326.23
4.4.90.0050.0154.78
4.4.80.0020.0204.76
4.4.70.0040.0164.75
4.4.60.0060.0154.76
4.4.50.0060.0174.77
4.4.40.0020.0324.71
4.4.30.0030.0214.76
4.4.20.0010.0224.84
4.4.10.0040.0174.85
4.4.00.0040.0284.76
4.3.110.0040.0174.67
4.3.100.0030.0174.66
4.3.90.0010.0244.63
4.3.80.0030.0284.58
4.3.70.0040.0154.63
4.3.60.0040.0174.62
4.3.50.0050.0194.62
4.3.40.0030.0264.54
4.3.30.0020.0163.28
4.3.20.0020.0173.25
4.3.10.0030.0153.22
4.3.00.0030.01315.91

preferences:
159.78 ms | 1394 KiB | 7 Q