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] = $i+1; } abstract class merging { public static function merge(array &$a, array &$b) { foreach ($b as $key => $value) { $a[$key] = $value; } return $a; } } $startTimeFunc = microtime(true); merging::merge($classmap1, $classmap2); $endTimeFunc = microtime(true); $startTimeMerge = microtime(true); $map = array_merge($classmap1, $classmap2); $endTimeMerge = microtime(true); $startTimeForeach = microtime(true); foreach ($classmap2 as $k => $v) { $classmap1[$k] = $v; } $endTimeForeach = microtime(true); echo "Merging took " . (($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)
7.4.00.0060.01618.63
7.3.120.0030.02018.41
7.3.110.0040.01518.88
7.3.100.0110.01718.23
7.3.90.0130.01718.77
7.3.80.0060.02218.71
7.3.70.0090.01318.64
7.3.60.0090.01918.54
7.3.50.0000.02618.54
7.3.40.0090.01218.58
7.3.30.0090.01518.31
7.3.20.0080.01222.39
7.3.10.0120.01222.66
7.3.00.0100.01322.58
7.2.250.0140.00618.38
7.2.240.0080.01518.10
7.2.230.0160.01318.67
7.2.220.0060.02518.27
7.2.210.0080.02018.67
7.2.200.0060.02218.52
7.2.190.0070.01318.29
7.2.180.0090.01618.33
7.2.170.0080.01218.43
7.2.130.0080.02820.83
7.2.120.0230.00520.92
7.2.110.0140.01120.89
7.2.100.0170.01020.82
7.2.90.0090.02220.92
7.2.80.0110.01620.81
7.2.70.0230.01020.95
7.2.60.0180.01120.96
7.2.50.0140.01720.94
7.2.40.0080.02520.93
7.2.30.0200.01020.83
7.2.20.0060.02120.48
7.2.10.0120.01521.00
7.2.00.0060.01022.04
7.1.330.0120.01819.79
7.1.320.0100.01319.77
7.1.310.0100.01619.67
7.1.300.0040.02119.64
7.1.290.0100.01419.72
7.1.280.0080.01519.75
7.1.270.0000.02519.69
7.1.260.0130.01319.76
7.1.250.0110.01819.68
7.1.70.0070.00421.07
7.1.60.0160.01620.87
7.1.50.0030.01320.95
7.1.00.0100.06726.23
7.0.200.0030.00720.73
7.0.140.0030.08026.21
7.0.100.0430.08323.43
7.0.90.0070.09723.43
7.0.80.0070.08023.32
7.0.70.0430.07723.30
7.0.60.0570.05723.41
7.0.50.0030.08023.66
7.0.40.0100.08720.03
7.0.30.0070.04720.11
7.0.20.0030.04719.96
7.0.10.0000.05320.10
7.0.00.0030.04720.08
5.6.280.0000.09027.08
5.6.250.0000.06326.74
5.6.240.0070.10026.66
5.6.230.0300.07726.63
5.6.220.0130.05026.83
5.6.210.0100.07026.77
5.6.200.0170.05327.25
5.6.190.0100.10727.09
5.6.180.0200.08027.27
5.6.170.0070.05327.27
5.6.160.0070.05727.11
5.6.150.0100.05027.22
5.6.140.0070.06727.15
5.6.130.0170.04327.30
5.6.120.0070.05727.24
5.6.110.0070.05727.22
5.6.100.0170.05327.18
5.6.90.0230.06027.21
5.6.80.0070.07726.68
5.6.70.0130.06026.53
5.6.60.0200.09326.66
5.6.50.0130.06026.59
5.6.40.0130.05326.61
5.6.30.0070.10026.57
5.6.20.0070.09026.64
5.6.10.0070.07026.55
5.6.00.0270.04326.64
5.5.380.0170.10026.54
5.5.370.0130.11026.52
5.5.360.0100.06726.55
5.5.350.0030.10026.53
5.5.340.0130.11027.09
5.5.330.0170.10726.84
5.5.320.0070.05726.83
5.5.310.0100.05027.07
5.5.300.0000.06027.09
5.5.290.0070.05726.84
5.5.280.0130.04727.02
5.5.270.0130.04327.07
5.5.260.0130.05327.02
5.5.250.0170.04026.83
5.5.240.0030.05026.38
5.5.230.0170.06726.50
5.5.220.0100.09026.33
5.5.210.0130.07726.17
5.5.200.0100.09326.31
5.5.190.0130.09726.37
5.5.180.0100.09326.46
5.5.160.0170.09326.31
5.5.150.0130.08726.34
5.5.140.0200.08726.43
5.5.130.0170.09326.33
5.5.120.0130.06726.46
5.5.110.0070.06326.45
5.5.100.0130.05726.36
5.5.90.0100.10326.14
5.5.80.0130.07026.30
5.5.70.0200.08726.29
5.5.60.0130.06026.13
5.5.50.0170.05029.32
5.5.40.0230.07329.35
5.5.30.0200.05729.42
5.5.20.0230.07029.33
5.5.10.0170.08029.38
5.5.00.0130.09329.35
5.4.450.0100.04728.45
5.4.440.0000.05728.58
5.4.430.0100.04028.64
5.4.420.0030.10028.58
5.4.410.0030.08028.27
5.4.400.0130.04328.28
5.4.390.0100.11328.26
5.4.380.0170.08328.33
5.4.370.0070.05328.34
5.4.360.0230.07728.27
5.4.350.0030.05028.29
5.4.340.0100.08028.14
5.4.320.0130.07728.06
5.4.310.0300.07028.11
5.4.300.0200.09328.25
5.4.290.0200.07028.25
5.4.280.0170.10328.20
5.4.270.0170.06728.43
5.4.260.0170.05728.24
5.4.250.0070.10028.21
5.4.240.0030.08028.31
5.4.230.0230.06728.27
5.4.220.0230.09028.40
5.4.210.0130.05728.25
5.4.200.0170.09328.29
5.4.190.0170.08328.32
5.4.180.0030.08728.38
5.4.170.0100.08028.29
5.4.160.0130.08328.25
5.4.150.0200.08028.23
5.4.140.0100.09025.50
5.4.130.0130.08725.66
5.4.120.0070.05725.46
5.4.110.0000.08025.64
5.4.100.0070.05325.69
5.4.90.0100.04725.74
5.4.80.0100.06725.54
5.4.70.0070.04725.70
5.4.60.0030.09325.60
5.4.50.0030.09025.56
5.4.40.0070.05725.74
5.4.30.0100.09725.63
5.4.20.0070.07025.70
5.4.10.0070.06325.54
5.4.00.0130.04024.90
5.3.290.0170.10323.50
5.3.280.0170.08023.38
5.3.270.0130.07723.45
5.3.260.0100.09323.59
5.3.250.0100.09323.49
5.3.240.0100.05723.44
5.3.230.0030.09023.43
5.3.220.0070.08723.54
5.3.210.0130.05723.36
5.3.200.0070.06023.67
5.3.190.0230.09723.41
5.3.180.0070.06023.45
5.3.170.0030.07323.37
5.3.160.0030.10323.44
5.3.150.0070.10023.46
5.3.140.0130.07023.39
5.3.130.0100.07723.49
5.3.120.0130.10323.38
5.3.110.0030.07323.42
5.3.100.0030.05022.84
5.3.90.0100.09022.81
5.3.80.0170.03722.77
5.3.70.0070.08022.79
5.3.60.0200.07722.82
5.3.50.0100.06722.79
5.3.40.0170.08322.85
5.3.30.0100.10322.64
5.3.20.0070.08022.46
5.3.10.0100.05322.54
5.3.00.0130.03719.38
5.2.170.0000.08019.87
5.2.160.0070.06319.68
5.2.150.0130.05019.82
5.2.140.0070.07319.77
5.2.130.0100.05319.84
5.2.120.0100.05719.82
5.2.110.0030.08019.78
5.2.100.0170.05319.86
5.2.90.0170.05719.72
5.2.80.0070.05019.91
5.2.70.0200.04319.74
5.2.60.0100.04019.87
5.2.50.0130.04719.76
5.2.40.0100.05319.66
5.2.30.0070.06019.77
5.2.20.0170.09319.62
5.2.10.0030.07319.61
5.2.00.0030.05019.52
5.1.60.0000.07020.44
5.1.50.0170.06320.25
5.1.40.0100.04320.41
5.1.30.0170.06320.65
5.1.20.0070.05020.57
5.1.10.0100.04020.42
5.1.00.0070.03010.16
5.0.50.0000.0278.39
5.0.40.0070.0308.49
5.0.30.0000.0708.31
5.0.20.0030.0438.32
5.0.10.0070.0438.25
5.0.00.0000.0378.18
4.4.90.0000.0178.18
4.4.80.0000.0308.18
4.4.70.0000.0338.18
4.4.60.0070.0338.18
4.4.50.0000.0378.18
4.4.40.0000.0578.18
4.4.30.0030.0138.18
4.4.20.0030.0338.18
4.4.10.0000.0178.18
4.4.00.0030.0278.18
4.3.110.0000.0178.18
4.3.100.0030.0138.18
4.3.90.0000.0308.18
4.3.80.0070.0408.18
4.3.70.0000.0238.18
4.3.60.0070.0308.18
4.3.50.0030.0308.18
4.3.40.0000.0338.18
4.3.30.0030.0378.18
4.3.20.0000.0208.18
4.3.10.0000.0378.18
4.3.00.0030.0208.18

preferences:
37.47 ms | 401 KiB | 5 Q