3v4l.org

run code in 300+ PHP versions simultaneously
<?php $classmap1 = array(); for ($i=1; $i<=5000; $i++) { $classmap1['a'.$i] = $i+1; } $classmap2 = array(); for ($i=1; $i<=5000; $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); $endTimeFunc = microtime(true); echo "Func took " . (($endTimeFunc - $startTimeFunc)*1000) ." microseconds<br />\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)
7.4.10.0070.01416.25
7.4.00.0130.00616.35
7.3.130.0140.00716.12
7.3.120.0120.00916.13
7.3.110.0070.01515.99
7.3.100.0100.00715.75
7.3.90.0070.01415.96
7.3.80.0120.00616.03
7.3.70.0100.00716.15
7.3.60.0000.01016.13
7.3.50.0080.00616.21
7.3.40.0030.01215.99
7.3.30.0120.00316.27
7.3.20.0040.01118.40
7.3.10.0000.01518.75
7.3.00.0030.01018.18
7.2.260.0160.00616.41
7.2.250.0120.00916.20
7.2.240.0040.01415.97
7.2.230.0030.01716.44
7.2.220.0100.01016.30
7.2.210.0110.00715.87
7.2.200.0100.00716.23
7.2.190.0030.01016.40
7.2.180.0040.00716.23
7.2.170.0070.01316.16
7.2.160.0070.01116.23
7.2.150.0040.01218.61
7.2.140.0090.00918.92
7.2.130.0080.00419.00
7.2.120.0080.00418.87
7.2.110.0100.00718.65
7.2.100.0090.00918.63
7.2.90.0090.00618.92
7.2.80.0060.01318.98
7.2.70.0030.01318.80
7.2.60.0060.01318.54
7.2.50.0090.00918.82
7.2.40.0030.01318.98
7.2.30.0060.00819.05
7.2.20.0070.00718.93
7.2.10.0070.00418.86
7.2.00.0080.01019.96
7.1.330.0090.00617.73
7.1.320.0000.01817.81
7.1.310.0000.01417.95
7.1.300.0090.00617.73
7.1.290.0130.00617.90
7.1.280.0090.00617.86
7.1.270.0000.01417.86
7.1.260.0000.01517.68
7.1.250.0030.01317.84
7.1.240.0100.00717.73
7.1.230.0070.01117.88
7.1.220.0030.01417.87
7.1.210.0040.01417.86
7.1.200.0070.01017.82
7.1.190.0100.01017.48
7.1.180.0040.01517.91
7.1.170.0140.00417.75
7.1.160.0040.00817.82
7.1.150.0000.01417.66
7.1.140.0080.00317.59
7.1.130.0000.01317.66
7.1.120.0030.01517.66
7.1.110.0060.00917.95
7.1.100.0060.00917.65
7.1.90.0000.01217.59
7.1.80.0060.01317.61
7.1.70.0040.00918.61
7.1.60.0070.01318.66
7.1.50.0040.01418.34
7.1.40.0060.01317.91
7.1.30.0030.01317.84
7.1.20.0070.01017.69
7.1.10.0090.00917.80
7.1.00.0030.04021.06
7.0.330.0060.00917.39
7.0.320.0040.01117.55
7.0.310.0040.01517.69
7.0.300.0030.00917.54
7.0.290.0040.01217.57
7.0.280.0120.00617.44
7.0.270.0080.00817.38
7.0.260.0070.01117.28
7.0.250.0000.01817.63
7.0.240.0040.00817.46
7.0.230.0070.00717.55
7.0.220.0110.00417.48
7.0.210.0100.00717.52
7.0.200.0430.00717.13
7.0.190.0070.01117.43
7.0.180.0060.01217.27
7.0.170.0040.00717.26
7.0.160.0070.01017.51
7.0.150.0030.01117.22
7.0.140.0080.04220.70
7.0.130.0070.01017.44
7.0.120.0040.01117.44
7.0.110.0060.01217.34
7.0.100.0170.04019.34
7.0.90.0130.03819.34
7.0.80.0100.03319.28
7.0.70.0020.04919.35
7.0.60.0070.04119.26
7.0.50.0030.03519.59
7.0.40.0080.04717.11
7.0.30.0050.05017.09
7.0.20.0100.04817.09
7.0.10.0020.03117.09
7.0.00.0070.04917.08
5.6.400.0150.00616.70
5.6.390.0060.01616.70
5.6.380.0090.00916.26
5.6.370.0140.00716.41
5.6.360.0070.01316.46
5.6.350.0030.02016.50
5.6.340.0030.01516.73
5.6.330.0030.01716.83
5.6.320.0000.02116.52
5.6.310.0090.01316.87
5.6.300.0060.01616.47
5.6.290.0100.01016.54
5.6.280.0090.04419.53
5.6.270.0120.01216.44
5.6.260.0090.01216.63
5.6.250.0070.04919.51
5.6.240.0110.05419.51
5.6.230.0030.04919.47
5.6.220.0120.04819.51
5.6.210.0090.04919.35
5.6.200.0080.04019.76
5.6.190.0110.04619.68
5.6.180.0050.03419.64
5.6.170.0050.05419.69
5.6.160.0110.04819.77
5.6.150.0070.04219.66
5.6.140.0130.04219.70
5.6.130.0080.04319.65
5.6.120.0150.02819.74
5.6.110.0110.04819.78
5.6.100.0030.04519.64
5.6.90.0080.04919.64
5.6.80.0030.03419.33
5.6.70.0070.03919.47
5.6.60.0080.03319.29
5.6.50.0120.03919.27
5.6.40.0060.02919.15
5.6.30.0100.04519.33
5.6.20.0050.04619.29
5.6.10.0020.04819.43
5.6.00.0110.03019.34
5.5.380.0120.04219.33
5.5.370.0100.04619.31
5.5.360.0100.04119.42
5.5.350.0100.04519.28
5.5.340.0100.04819.54
5.5.330.0130.03519.54
5.5.320.0070.04619.55
5.5.310.0070.04819.38
5.5.300.0080.04819.62
5.5.290.0050.04319.57
5.5.280.0090.02719.50
5.5.270.0080.04719.63
5.5.260.0080.04919.48
5.5.250.0110.04619.45
5.5.240.0050.04719.24
5.5.230.0080.04019.12
5.5.220.0050.04819.07
5.5.210.0070.04019.29
5.5.200.0050.03519.19
5.5.190.0100.04419.16
5.5.180.0110.04419.26
5.5.170.0140.00916.44
5.5.160.0080.04119.20
5.5.150.0060.03719.04
5.5.140.0030.05619.06
5.5.130.0100.04519.26
5.5.120.0060.03819.19
5.5.110.0130.04619.16
5.5.100.0050.03318.97
5.5.90.0110.03118.98
5.5.80.0030.05019.24
5.5.70.0070.04119.08
5.5.60.0070.04719.09
5.5.50.0080.04918.98
5.5.40.0100.04519.25
5.5.30.0120.04418.98
5.5.20.0050.04418.96
5.5.10.0090.04219.25
5.5.00.0050.02818.98
5.4.450.0000.03317.55
5.4.440.0070.04517.63
5.4.430.0080.04617.66
5.4.420.0050.04117.58
5.4.410.0060.03317.62
5.4.400.0080.02717.45
5.4.390.0090.03917.44
5.4.380.0050.04217.39
5.4.370.0080.04017.44
5.4.360.0080.04017.41
5.4.350.0040.04517.47
5.4.340.0060.03117.35
5.4.330.0100.00614.09
5.4.320.0050.04617.42
5.4.310.0120.04317.47
5.4.300.0040.03217.42
5.4.290.0060.03517.35
5.4.280.0130.03517.39
5.4.270.0130.04017.46
5.4.260.0050.04817.38
5.4.250.0030.03617.38
5.4.240.0100.04317.50
5.4.230.0090.02817.46
5.4.220.0070.04717.36
5.4.210.0050.03017.43
5.4.200.0040.02717.46
5.4.190.0050.03317.42
5.4.180.0090.02417.42
5.4.170.0070.03117.53
5.4.160.0130.03717.45
5.4.150.0050.02817.45
5.4.140.0050.04816.06
5.4.130.0030.03916.14
5.4.120.0050.04116.09
5.4.110.0030.03016.09
5.4.100.0030.02816.16
5.4.90.0070.04216.10
5.4.80.0100.04316.15
5.4.70.0070.04416.09
5.4.60.0080.04516.16
5.4.50.0050.04416.13
5.4.40.0030.05116.12
5.4.30.0060.04216.16
5.4.20.0050.02716.14
5.4.10.0070.04416.13
5.4.00.0090.03915.87
5.3.290.0110.03115.23
5.3.280.0050.03115.19
5.3.270.0050.04515.13
5.3.260.0030.05015.20
5.3.250.0020.03715.18
5.3.240.0080.04315.13
5.3.230.0070.04215.21
5.3.220.0080.04115.17
5.3.210.0050.02715.16
5.3.200.0050.05115.10
5.3.190.0070.04715.19
5.3.180.0070.04515.18
5.3.170.0080.04015.11
5.3.160.0050.02815.13
5.3.150.0030.04715.19
5.3.140.0050.03815.13
5.3.130.0050.04915.19
5.3.120.0030.04915.09
5.3.110.0140.03815.16
5.3.100.0030.05314.89
5.3.90.0070.04815.10
5.3.80.0030.03214.82
5.3.70.0080.02514.81
5.3.60.0060.04114.88
5.3.50.0050.05014.84
5.3.40.0080.04514.80
5.3.30.0150.03814.77
5.3.20.0070.03014.71
5.3.10.0050.03114.69
5.3.00.0120.04014.78
5.2.170.0130.06713.67
5.2.160.0070.06313.61
5.2.150.0030.07313.71
5.2.140.0030.03713.65
5.2.130.0030.06713.70
5.2.120.0230.05013.77
5.2.110.0070.04313.70
5.2.100.0130.04013.60
5.2.90.0100.06313.74
5.2.80.0100.04713.71
5.2.70.0070.06313.71
5.2.60.0030.04713.58
5.2.50.0070.07013.61
5.2.40.0030.07314.05
5.2.30.0030.07013.41
5.2.20.0000.05313.64
5.2.10.0070.05013.95
5.2.00.0030.05013.35
5.1.60.0030.06313.45
5.1.50.0070.06313.23
5.1.40.0070.04713.29
5.1.30.0030.03713.82
5.1.20.0130.06013.66
5.1.10.0070.07013.38
5.1.00.0100.03013.32
5.0.50.0030.04311.70
5.0.40.0000.03711.70
5.0.30.0030.03711.70
5.0.20.0000.03011.70
5.0.10.0100.03011.70
5.0.00.0030.06711.70
4.4.90.0100.03011.70
4.4.80.0030.03311.70
4.4.70.0070.01311.70
4.4.60.0000.02311.70
4.4.50.0030.02011.70
4.4.40.0000.03011.70
4.4.30.0030.03311.70
4.4.20.0030.01711.70
4.4.10.0030.02711.70
4.4.00.0000.05011.70
4.3.110.0070.03311.70
4.3.100.0030.02311.70
4.3.90.0100.03011.70
4.3.80.0000.05311.70
4.3.70.0070.03011.70
4.3.60.0030.03311.70
4.3.50.0100.02711.70
4.3.40.0030.04011.70
4.3.30.0000.03711.70
4.3.20.0030.02011.70
4.3.10.0070.02011.70
4.3.00.0000.03711.70

preferences:
40.46 ms | 401 KiB | 5 Q