3v4l.org

run code in 300+ PHP versions simultaneously
<?php $classmap1 = array(); for ($i=1; $i<=10000; $i++) { $classmap1['a'.$i] = $i+1; } $classmap2 = array(); for ($i=1; $i<=10000; $i++) { $classmap2['b'.$i] = $i+1; } $startTimeMerge = microtime(true); $map = array_merge($classmap1, $classmap2); $endTimeMerge = microtime(true); $startTimeForeach = microtime(true); foreach ($classmap2 as $k => $v) { $classmap1[$k] = $v; } $endTimeForeach = microtime(true); abstract class merging { public static function merge(array &$a, array &$b) { foreach ($b as $key => $value) { $a[$key] = $value; } return $a; } } $startTimeFunc = microtime(true); merging::merge($classmap1, $classmap2); $endTimeFunc = microtime(true); echo "Merging took " . (($endTimeMerge - $startTimeMerge)*1000) ." microseconds<br />\n"; //var_dump($map); echo "Foreach took " . (($endTimeForeach - $startTimeForeach)*1000) ." microseconds<br />\n"; //var_dump($classmap1); echo "Func took " . (($endTimeFunc - $startTimeFunc)*1000) ." microseconds<br />\n"; //var_dump($am);

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)
7.2.00.0030.01423.39
7.1.70.0000.01120.72
7.1.60.0000.01621.22
7.1.50.0140.01720.94
7.1.00.0070.08026.21
7.0.200.0120.00420.31
7.0.140.0000.08326.18
7.0.60.0100.08023.36
7.0.50.0130.07721.13
7.0.40.0000.06720.09
7.0.30.0330.03720.08
7.0.20.0200.08020.34
7.0.10.0370.07320.30
7.0.00.0170.07320.17
5.6.280.0100.08327.32
5.6.210.0070.08026.92
5.6.200.0070.06324.33
5.6.190.0070.06026.65
5.6.180.3600.05726.54
5.6.170.0270.05026.62
5.6.160.0070.06726.58
5.6.150.0030.09724.28
5.6.140.0170.04724.32
5.6.130.0130.09324.36
5.6.120.0100.07727.20
5.6.110.0100.04727.13
5.6.100.0170.09027.26
5.6.90.0070.05727.30
5.6.80.0000.11026.61
5.6.70.0300.08026.67
5.5.350.0070.10026.58
5.5.340.0130.09724.09
5.5.330.0200.08726.21
5.5.320.0370.04726.32
5.5.310.0270.04026.31
5.5.300.0130.06324.09
5.5.290.0030.07324.13
5.5.280.0070.06026.95
5.5.270.0070.05027.17
5.5.260.0100.09027.00
5.5.250.0100.10026.77
5.5.240.0130.09726.24
5.4.450.0500.07726.55
5.4.440.0430.06326.41
5.4.430.0430.07726.36
5.4.420.0370.08726.47
5.4.410.0400.05726.35
5.4.400.0370.06026.26
5.4.390.0400.07326.25
5.4.380.0330.05726.23
5.4.370.0370.07726.15
5.4.360.0400.09026.09
5.4.350.0400.08326.24
5.4.340.0430.07726.19
5.4.320.0370.06726.04
5.4.310.0400.08326.16
5.4.300.0400.07726.25
5.4.290.0400.08026.19
5.4.280.0570.06326.05
5.4.270.0370.04326.14
5.4.260.0330.04326.00
5.4.250.0370.06326.07
5.4.240.0370.08026.14
5.4.230.0230.05726.11
5.4.220.0600.04726.03
5.4.210.0430.05326.14
5.4.200.0270.09326.03
5.4.190.0430.07726.14
5.4.180.0330.08026.00
5.4.170.0400.05026.07
5.4.160.0370.05726.13
5.4.150.0400.08026.22
5.4.140.0370.08723.58
5.4.130.0270.05323.51
5.4.120.0430.08023.49
5.4.110.0400.07323.75
5.4.100.0470.06323.60
5.4.90.0370.08723.79
5.4.80.0370.04023.56
5.4.70.0300.08723.48
5.4.60.0470.07723.47
5.4.50.0370.05323.37
5.4.40.0400.08323.37
5.4.30.0500.06323.63
5.4.20.0300.05023.72
5.4.10.0500.07723.61
5.4.00.0530.06323.05
5.3.290.0400.04021.72
5.3.280.0270.05321.58
5.3.270.0330.05021.58
5.3.260.0330.04321.58
5.3.250.0370.08721.67
5.3.240.0330.06021.68
5.3.230.0330.04321.64
5.3.220.0400.05721.71
5.3.210.0400.08021.53
5.3.200.0370.08021.72
5.3.190.0300.08721.76
5.3.180.0400.08321.63
5.3.170.0370.08321.64
5.3.160.0300.09321.64
5.3.150.0430.08721.63
5.3.140.0330.08721.60
5.3.130.0400.08721.69
5.3.120.0430.08021.62
5.3.110.0370.05321.66
5.3.100.0370.07721.10
5.3.90.0330.08720.98
5.3.80.0270.06321.14
5.3.70.0270.05720.91
5.3.60.0300.05021.08
5.3.50.0370.05720.93
5.3.40.0470.04720.84
5.3.30.0400.08321.04
5.3.20.0400.06720.61
5.3.10.0430.06320.65
5.3.00.0370.03719.36
5.2.170.0370.06319.55
5.2.160.0300.07719.37
5.2.150.0230.05319.33
5.2.140.0300.05019.33
5.2.130.0570.02719.31
5.2.120.0200.05319.31
5.2.110.0330.05319.47
5.2.100.0170.04319.38
5.2.90.0370.05719.29
5.2.80.0200.08719.41
5.2.70.0370.07719.35
5.2.60.0370.06019.39
5.2.50.0300.07718.84
5.2.40.0230.07018.81
5.2.30.0230.07718.78
5.2.20.0300.07718.86
5.2.10.0300.06718.62
5.2.00.0270.07718.54
5.1.60.0330.07019.28
5.1.50.0300.06719.16
5.1.40.0370.04319.20
5.1.30.0400.06719.79
5.1.20.0230.04319.53
5.1.10.0200.04719.53
5.1.00.0270.05010.23
5.0.50.0200.0378.57
5.0.40.0100.0238.40
5.0.30.0070.0338.46
5.0.20.0200.0338.19
5.0.10.0230.0308.16
5.0.00.0100.0638.39
4.4.90.0100.0307.64
4.4.80.0200.0277.64
4.4.70.0100.0337.64
4.4.60.0170.0277.64
4.4.50.0100.0337.64
4.4.40.0100.0477.64
4.4.30.0100.0377.64
4.4.20.0100.0177.64
4.4.10.0170.0307.64
4.4.00.0070.0407.64
4.3.110.0130.0137.64
4.3.100.0130.0337.64
4.3.90.0130.0207.64
4.3.80.0130.0277.64
4.3.70.0100.0237.64
4.3.60.0170.0307.64
4.3.50.0170.0207.64
4.3.40.0130.0277.64
4.3.30.0030.0207.64
4.3.20.0200.0177.64
4.3.10.0100.0207.64
4.3.00.0100.0307.64

preferences:
33.12 ms | 400 KiB | 5 Q