3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo = 'foo'; foreach (range(1,100) as $i) { $$i = ''; } foreach (range(1,100) as $y) { $$y = ''; } var_dump($a = memory_get_usage()); foreach (range(1,100) as $i) { $$i = $foo; } var_dump($b = memory_get_usage()); foreach (range(1,100) as $y) { $$y &= $foo; } var_dump($c = memory_get_usage()); echo "Copy: " . ($b - $a) . "\n"; echo "Ref : " . ($c - $b) . "\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)
7.2.00.0030.01519.27
7.1.70.0000.00717.22
7.1.60.0090.01519.46
7.1.50.0060.00617.14
7.1.00.0130.06722.31
7.0.200.0050.00316.58
7.0.140.0030.07322.16
7.0.60.0070.07020.01
7.0.50.0130.06317.93
7.0.40.0030.07720.05
7.0.30.0230.03320.00
7.0.20.0230.09020.12
7.0.10.0170.06020.17
7.0.00.0170.04320.20
5.6.280.0070.07020.91
5.6.210.0100.07020.60
5.6.200.0030.08318.21
5.6.190.0000.06320.42
5.6.180.0230.06320.41
5.6.170.0270.07020.45
5.6.160.0000.04720.35
5.6.150.0070.04318.08
5.6.140.0000.07318.15
5.6.130.0130.07318.20
5.6.120.0030.05321.02
5.6.110.0100.06321.05
5.6.100.0030.04021.01
5.6.90.0070.04720.93
5.6.80.0070.04720.53
5.6.70.3400.04020.50
5.5.350.0100.06320.53
5.5.340.0070.04317.98
5.5.330.0000.07320.20
5.5.320.0430.07020.41
5.5.310.0200.07020.29
5.5.300.0070.08717.98
5.5.290.0130.08017.94
5.5.280.0030.07720.89
5.5.270.0000.04320.79
5.5.260.0170.07720.86
5.5.250.0030.04020.66
5.5.240.0100.05020.04
5.4.450.0170.04319.41
5.4.440.0200.06319.28
5.4.430.0600.04719.41
5.4.420.0230.05019.57
5.4.410.0400.04319.36
5.4.400.0300.03319.24
5.4.390.0230.04019.25
5.4.380.0500.04718.69
5.4.370.0400.06018.60
5.4.360.0300.06018.52
5.4.350.0330.06318.55
5.4.340.0470.04718.61
5.4.320.0030.03912.48
5.4.310.0010.04212.48
5.4.300.0030.03912.48
5.4.290.0030.04012.48
5.4.280.0060.03412.38
5.4.270.0100.03212.38
5.4.260.0040.03812.38
5.4.250.0070.03412.38
5.4.240.0060.04012.38
5.4.230.0040.03912.37
5.4.220.0070.04012.37
5.4.210.0040.03712.37
5.4.200.0060.03812.37
5.4.190.0010.04012.37
5.4.180.0080.03612.36
5.4.170.0040.03712.38
5.4.160.0050.03612.37
5.4.150.0060.03612.37
5.4.140.0080.03712.05
5.4.130.0050.03812.04
5.4.120.0050.03712.00
5.4.110.0060.03712.00
5.4.100.0050.03712.00
5.4.90.0040.04112.00
5.4.80.0060.03711.99
5.4.70.0090.03211.99
5.4.60.0060.03411.99
5.4.50.0080.03211.99
5.4.40.0060.03411.98
5.4.30.0050.03511.98
5.4.20.0050.03811.98
5.4.10.0060.04311.98
5.4.00.0050.03711.47
5.3.290.0070.03812.80
5.3.280.0070.03712.71
5.3.270.0050.03912.73
5.3.260.0080.03612.72
5.3.250.0050.03712.72
5.3.240.0090.03512.72
5.3.230.0040.04012.71
5.3.220.0080.03612.68
5.3.210.0070.03812.68
5.3.200.0050.03712.68
5.3.190.0070.03612.68
5.3.180.0120.03212.67
5.3.170.0120.03712.67
5.3.160.0050.03912.68
5.3.150.0100.03412.67
5.3.140.0030.04012.66
5.3.130.0070.03812.66
5.3.120.0060.03912.66
5.3.110.0050.04112.66
5.3.100.0060.03712.12
5.3.90.0040.03812.09
5.3.80.0080.03612.09
5.3.70.0030.03912.09
5.3.60.0060.03612.07
5.3.50.0060.04212.02
5.3.40.0060.03512.02
5.3.30.0050.03511.98
5.3.20.0060.03511.75
5.3.10.0050.03911.72
5.3.00.0060.03511.71
5.2.170.0040.0349.21
5.2.160.0030.0439.21
5.2.150.0110.0249.21
5.2.140.0060.0399.21
5.2.130.0080.0309.16
5.2.120.0060.0429.17
5.2.110.0030.0319.18
5.2.100.0030.0309.17
5.2.90.0040.0329.17
5.2.80.0080.0329.17
5.2.70.0060.0299.17
5.2.60.0080.0349.12
5.2.50.0070.0369.08
5.2.40.0060.0289.07
5.2.30.0030.0319.04
5.2.20.0030.0319.03
5.2.10.0020.0318.96
5.2.00.0040.0308.83
5.1.60.0040.0298.12
5.1.50.0010.0308.12
5.1.40.0020.0268.10
5.1.30.0060.0268.45
5.1.20.0030.0278.47
5.1.10.0040.0258.20
5.1.00.0050.0248.20
5.0.50.0050.0196.67
5.0.40.0050.0246.54
5.0.30.0070.0396.34
5.0.20.0020.0206.31
5.0.10.0040.0196.29
5.0.00.0050.0316.28
4.4.90.0020.0184.78
4.4.80.0050.0164.76
4.4.70.0040.0164.76
4.4.60.0050.0134.75
4.4.50.0030.0154.77
4.4.40.0030.0264.70
4.4.30.0060.0154.76
4.4.20.0030.0224.84
4.4.10.0050.0204.85
4.4.00.0030.0304.76
4.3.110.0020.0174.67
4.3.100.0020.0154.67
4.3.90.0040.0134.63
4.3.80.0040.0244.58
4.3.70.0050.0124.63
4.3.60.0020.0154.63
4.3.50.0030.0164.63
4.3.40.0040.0234.54
4.3.30.0020.0153.33
4.3.20.0020.0163.30
4.3.10.0020.0163.27
4.3.00.0030.01718.23

preferences:
35.3 ms | 401 KiB | 5 Q