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 &$b) { return array_merge($a, $b); } } $startTimeFunc = microtime(true); $am = merging::merge($classmap1, $classmap2); $endTimeFunc = microtime(true); echo "Func took " . (($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)
7.4.00.0000.02517.64
7.3.120.0070.01817.52
7.3.110.0130.01317.60
7.3.100.0100.01017.21
7.3.90.0030.01417.56
7.3.80.0060.00917.46
7.3.70.0070.01417.66
7.3.60.0070.01117.70
7.3.50.0030.01317.35
7.3.40.0130.00017.49
7.3.30.0100.01017.68
7.3.20.0060.01220.27
7.3.10.0040.01120.67
7.3.00.0070.01320.56
7.2.250.0070.01417.21
7.2.240.0070.01817.29
7.2.230.0110.01117.25
7.2.220.0040.01817.46
7.2.210.0030.01717.04
7.2.200.0030.01717.36
7.2.190.0130.00717.30
7.2.180.0030.01617.45
7.2.170.0100.01017.11
7.2.160.0070.01117.26
7.2.150.0070.01018.43
7.2.140.0070.01318.86
7.2.130.0030.01218.75
7.2.120.0100.01018.53
7.2.110.0030.01618.50
7.2.100.0130.00318.54
7.2.90.0040.01618.90
7.2.80.0030.00918.86
7.2.70.0030.01618.92
7.2.60.0100.00618.69
7.2.50.0040.01218.58
7.2.40.0040.01118.53
7.2.30.0040.01418.90
7.2.20.0030.01618.62
7.2.10.0040.01818.59
7.2.00.0090.00620.00
7.1.330.0030.02019.57
7.1.320.0000.01619.70
7.1.310.0000.01619.50
7.1.300.0030.01319.73
7.1.290.0030.01719.74
7.1.280.0110.00819.71
7.1.270.0090.00919.65
7.1.260.0040.01419.55
7.1.250.0100.01019.63
7.1.240.0030.01719.73
7.1.230.0030.01619.67
7.1.220.0070.01119.61
7.1.210.0060.01319.50
7.1.200.0030.01019.61
7.1.190.0100.01019.61
7.1.180.0040.01419.77
7.1.170.0030.01019.74
7.1.160.0000.02019.68
7.1.150.0060.01219.48
7.1.140.0080.01219.53
7.1.130.0070.00719.44
7.1.120.0030.01419.63
7.1.110.0070.01019.59
7.1.100.0060.01319.68
7.1.90.0000.01719.50
7.1.80.0040.01119.55
7.1.70.0050.01320.31
7.1.60.0060.01320.39
7.1.50.0080.01620.27
7.1.40.0070.01419.75
7.1.30.0100.01319.66
7.1.20.0120.00619.61
7.1.10.0000.01319.57
7.1.00.0080.03922.81
7.0.330.0100.00719.39
7.0.320.0100.00619.11
7.0.310.0060.01219.12
7.0.300.0070.01019.38
7.0.290.0060.01519.30
7.0.280.0060.01519.21
7.0.270.0060.01319.43
7.0.260.0070.00719.36
7.0.250.0000.01219.26
7.0.240.0030.01419.34
7.0.230.0070.01119.50
7.0.220.0130.00319.54
7.0.210.0070.01019.13
7.0.200.0030.01320.19
7.0.190.0060.01619.32
7.0.180.0110.01119.24
7.0.170.0030.01619.26
7.0.160.0000.01519.23
7.0.150.0060.00919.50
7.0.140.0050.04522.72
7.0.130.0030.01319.45
7.0.120.0090.00919.44
7.0.110.0060.01219.35
7.0.100.0070.01119.26
7.0.90.0000.02219.33
7.0.80.0000.01919.38
7.0.70.0060.00919.21
7.0.60.0050.04421.15
7.0.50.0080.04520.04
7.0.40.0100.03216.71
7.0.30.0090.04016.92
7.0.20.0100.04916.78
7.0.10.0070.02716.82
7.0.00.0050.03216.68
5.6.400.0070.02021.37
5.6.390.0070.02321.68
5.6.380.0070.02521.92
5.6.370.0040.02521.31
5.6.360.0000.02821.44
5.6.350.0100.02221.83
5.6.340.0100.01921.35
5.6.330.0030.02721.80
5.6.320.0100.01721.61
5.6.310.0030.03021.74
5.6.300.0100.02021.85
5.6.290.0000.03121.65
5.6.280.0120.05224.84
5.6.270.0030.02221.29
5.6.260.0100.01721.41
5.6.250.0100.02321.72
5.6.240.0100.02021.41
5.6.230.0110.01821.69
5.6.220.0070.02621.51
5.6.210.0140.02924.68
5.6.200.0070.05023.46
5.6.190.0130.05624.55
5.6.180.0100.03824.67
5.6.170.0080.04724.39
5.6.160.0170.03224.41
5.6.150.0150.06224.34
5.6.140.0140.03624.48
5.6.130.0140.05824.62
5.6.120.0080.05824.39
5.6.110.0120.03824.66
5.6.100.0170.04924.43
5.6.90.0110.04624.47
5.6.80.0140.02824.25
5.6.70.0100.03524.25
5.6.60.0080.05724.19
5.6.50.0100.05824.27
5.6.40.0070.04224.01
5.6.30.0110.05324.06
5.6.20.0100.04024.17
5.6.10.0050.04824.07
5.6.00.0070.05324.29
5.5.380.0100.02121.59
5.5.370.0070.02321.61
5.5.360.0160.01621.31
5.5.350.0170.05124.67
5.5.340.0050.06123.38
5.5.330.0070.04824.54
5.5.320.0020.04124.63
5.5.310.0080.05024.54
5.5.300.0150.05124.35
5.5.290.0140.05124.29
5.5.280.0030.04224.38
5.5.270.0050.03924.57
5.5.260.0070.04124.19
5.5.250.0020.04424.24
5.5.240.0130.05324.03
5.5.230.0110.04124.02
5.5.220.0080.05424.06
5.5.210.0050.06123.90
5.5.200.0080.03924.14
5.5.190.0050.05923.97
5.5.180.0000.04223.98
5.5.170.0100.02721.35
5.5.160.0080.05924.08
5.5.150.0140.05224.20
5.5.140.0060.04323.98
5.5.130.0030.05224.03
5.5.120.0170.05023.95
5.5.110.0050.04623.99
5.5.100.0090.03623.99
5.5.90.0130.04724.04
5.5.80.0100.03623.91
5.5.70.0100.04323.99
5.5.60.0100.03223.97
5.5.50.0130.04324.15
5.5.40.0100.05523.93
5.5.30.0110.05623.76
5.5.20.0020.05224.04
5.5.10.0080.03823.89
5.5.00.0130.05623.91
5.4.450.0100.05822.35
5.4.440.0100.05822.36
5.4.430.0050.04622.38
5.4.420.0110.03322.54
5.4.410.0070.05422.41
5.4.400.0130.04522.13
5.4.390.0050.04322.28
5.4.380.0080.04222.31
5.4.370.0110.05022.18
5.4.360.0070.05422.38
5.4.350.0070.06122.22
5.4.340.0070.04022.25
5.4.330.0130.01918.32
5.4.320.0130.05122.33
5.4.310.0100.05422.38
5.4.300.0100.05722.32
5.4.290.0060.03522.19
5.4.280.0100.03322.47
5.4.270.0120.03222.38
5.4.260.0170.04922.33
5.4.250.0100.05822.30
5.4.240.0100.05422.23
5.4.230.0150.04022.20
5.4.220.0020.04522.01
5.4.210.0060.03322.22
5.4.200.0070.03722.21
5.4.190.0050.03622.26
5.4.180.0020.04322.40
5.4.170.0150.03122.41
5.4.160.0120.05122.20
5.4.150.0090.03422.26
5.4.140.0130.05020.77
5.4.130.0030.03820.91
5.4.120.0050.04521.06
5.4.110.0080.03620.81
5.4.100.0070.03521.04
5.4.90.0070.05520.91
5.4.80.0030.05220.98
5.4.70.0120.03220.82
5.4.60.0050.05621.04
5.4.50.0120.05020.95
5.4.40.0080.05620.96
5.4.30.0150.04221.04
5.4.20.0100.03820.93
5.4.10.0070.03320.82
5.4.00.0100.03020.67
5.3.290.0100.05519.46
5.3.280.0020.04319.20
5.3.270.0120.05319.31
5.3.260.0050.03619.41
5.3.250.0060.04919.46
5.3.240.0120.04219.37
5.3.230.0140.05219.44
5.3.220.0100.05619.24
5.3.210.0120.05219.35
5.3.200.0100.05219.30
5.3.190.0100.04519.38
5.3.180.0100.05319.44
5.3.170.0050.03619.35
5.3.160.0130.04519.32
5.3.150.0050.05619.40
5.3.140.0120.05219.36
5.3.130.0000.04619.39
5.3.120.0080.05219.39
5.3.110.0030.03919.35
5.3.100.0050.05119.10
5.3.90.0040.05418.99
5.3.80.0080.04718.98
5.3.70.0080.05518.93
5.3.60.0050.03918.96
5.3.50.0100.04919.00
5.3.40.0100.04518.99
5.3.30.0080.03319.01
5.3.20.0070.05018.82
5.3.10.0080.05518.57
5.3.00.0070.05518.80
5.2.170.0000.06017.91
5.2.160.0000.08317.92
5.2.150.0070.03717.84
5.2.140.0130.04717.75
5.2.130.0170.07017.96
5.2.120.0030.05317.73
5.2.110.0030.06317.95
5.2.100.0130.05017.81
5.2.90.0070.04717.82
5.2.80.0070.05717.86
5.2.70.0000.04317.81
5.2.60.0130.06017.79
5.2.50.0100.07717.78
5.2.40.0070.08017.70
5.2.30.0100.07317.75
5.2.20.0100.06717.78
5.2.10.0130.07317.61
5.2.00.0030.04717.56
5.1.60.0030.05018.27
5.1.50.0170.03718.29
5.1.40.0000.07018.07
5.1.30.0100.07318.54
5.1.20.0130.04318.43
5.1.10.0000.04718.41
5.1.00.0100.04710.13
5.0.50.0100.0238.60
5.0.40.0070.0278.55
5.0.30.0000.0608.32
5.0.20.0070.0408.19
5.0.10.0000.0378.20
5.0.00.0030.0678.18
4.4.90.0030.0236.45
4.4.80.0000.0406.45
4.4.70.0070.0276.45
4.4.60.0000.0276.45
4.4.50.0070.0176.45
4.4.40.0030.0236.45
4.4.30.0000.0406.45
4.4.20.0000.0206.45
4.4.10.0000.0306.45
4.4.00.0000.0506.45
4.3.110.0000.0406.45
4.3.100.0030.0376.45
4.3.90.0000.0376.45
4.3.80.0070.0436.45
4.3.70.0030.0236.45
4.3.60.0100.0236.45
4.3.50.0000.0376.45
4.3.40.0000.0536.45
4.3.30.0030.0206.45
4.3.20.0000.0406.45
4.3.10.0030.0176.45
4.3.00.0030.0206.45

preferences:
36.92 ms | 401 KiB | 5 Q