3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr1 = ["apple" => "bla", "peer" => "bleh"]; $arr2 = ["apple" => "foo", "bar" => "baz"]; $arr1Keys = array_keys($arr1); $arr2Keys = array_keys($arr2); $totalKeys = array_unique(array_merge($arr1Keys, $arr2Keys)); var_dump($arr1Keys, $arr2Keys, $totalKeys);

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)
8.3.70.0080.01116.58
8.3.60.0070.00718.18
8.3.50.0110.00822.87
8.3.40.0070.00718.63
8.3.30.0070.00719.09
8.3.20.0040.00420.29
8.3.10.0060.00923.57
8.3.00.0000.00819.13
8.2.180.0110.01116.63
8.2.170.0060.01222.96
8.2.160.0040.01218.55
8.2.150.0050.00224.18
8.2.140.0050.00324.66
8.2.130.0080.00026.16
8.2.120.0040.00420.81
8.2.110.0060.00320.41
8.2.100.0040.00817.78
8.2.90.0030.00619.16
8.2.80.0000.00917.97
8.2.70.0030.00517.37
8.2.60.0000.00717.80
8.2.50.0030.00618.07
8.2.40.0040.00418.22
8.2.30.0080.00019.43
8.2.20.0030.00517.51
8.2.10.0040.00418.00
8.2.00.0080.00017.73
8.1.280.0170.00325.92
8.1.270.0040.00423.78
8.1.260.0040.00426.35
8.1.250.0000.00928.09
8.1.240.0030.00623.97
8.1.230.0080.00319.09
8.1.220.0000.00817.77
8.1.210.0060.00318.77
8.1.200.0030.00717.22
8.1.190.0080.00017.10
8.1.180.0050.00318.10
8.1.170.0030.00618.58
8.1.160.0070.00021.93
8.1.150.0000.00718.72
8.1.140.0040.00417.38
8.1.130.0000.00717.73
8.1.120.0040.00417.29
8.1.110.0050.00317.45
8.1.100.0070.00017.29
8.1.90.0000.00717.28
8.1.80.0040.00417.39
8.1.70.0030.00317.39
8.1.60.0000.00717.43
8.1.50.0080.00017.46
8.1.40.0040.00417.46
8.1.30.0030.00617.47
8.1.20.0050.00317.62
8.1.10.0040.00417.50
8.1.00.0070.00017.36
8.0.300.0000.00818.77
8.0.290.0040.00416.75
8.0.280.0000.00818.38
8.0.270.0000.00717.11
8.0.260.0080.00017.19
8.0.250.0030.00316.90
8.0.240.0080.00016.76
8.0.230.0030.00316.89
8.0.220.0030.00316.82
8.0.210.0000.00816.71
8.0.200.0000.00716.75
8.0.190.0030.00516.88
8.0.180.0000.00916.91
8.0.170.0040.00416.89
8.0.160.0030.00316.82
8.0.150.0000.00716.79
8.0.140.0070.00016.64
8.0.130.0050.00213.31
8.0.120.0000.00816.82
8.0.110.0030.00516.71
8.0.100.0000.00716.61
8.0.90.0040.00416.64
8.0.80.0090.00916.79
8.0.70.0000.00716.81
8.0.60.0000.00716.71
8.0.50.0000.00816.79
8.0.30.0090.01016.88
8.0.20.0120.01517.40
8.0.10.0040.00416.99
8.0.00.0080.00816.63
7.4.330.0030.00315.03
7.4.320.0000.00616.52
7.4.300.0030.00316.55
7.4.290.0000.00716.54
7.4.280.0000.01016.60
7.4.270.0040.00316.42
7.4.260.0000.00716.37
7.4.250.0080.00016.41
7.4.240.0040.00416.50
7.4.230.0000.00716.53
7.4.220.0060.01616.46
7.4.210.0030.01216.64
7.4.200.0080.00016.41
7.4.160.0090.00916.44
7.4.150.0060.01917.40
7.4.140.0090.00917.86
7.4.130.0100.00716.39
7.4.120.0130.00416.43
7.4.110.0130.00716.64
7.4.100.0070.01016.44
7.4.90.0080.00816.42
7.4.80.0120.00619.39
7.4.70.0120.00616.38
7.4.60.0070.01116.31
7.4.50.0080.00016.44
7.4.40.0120.00416.29
7.4.30.0090.00916.29
7.4.00.0080.00814.88
7.3.330.0030.00313.06
7.3.320.0030.00312.97
7.3.310.0000.00716.27
7.3.300.0030.00316.04
7.3.290.0100.00616.11
7.3.280.0060.00916.14
7.3.270.0090.00917.40
7.3.260.0110.00816.07
7.3.250.0090.00816.30
7.3.240.0120.00616.23
7.3.230.0030.01516.39
7.3.210.0140.00316.18
7.3.200.0100.00519.39
7.3.190.0070.01016.34
7.3.180.0040.01216.17
7.3.170.0120.00316.27
7.3.160.0110.00616.07
7.3.120.0080.00814.95
7.3.110.0100.00714.85
7.3.100.0000.01414.67
7.3.90.0030.01314.89
7.3.80.0070.00714.90
7.3.70.0060.00614.74
7.3.60.0060.01214.66
7.3.50.0030.01014.82
7.3.40.0040.01114.67
7.3.30.0070.00314.74
7.3.20.0030.00616.56
7.3.10.0070.00716.46
7.3.00.0080.00616.61
7.2.330.0190.00316.57
7.2.320.0030.01416.66
7.2.310.0080.01116.34
7.2.300.0130.00616.32
7.2.290.0080.00816.59
7.2.250.0000.01614.75
7.2.240.0060.01514.72
7.2.230.0060.00914.99
7.2.220.0030.01314.84
7.2.210.0040.00814.92
7.2.200.0000.01214.65
7.2.190.0030.01314.78
7.2.180.0040.00414.75
7.2.170.0030.00614.84
7.1.330.0000.01415.83
7.1.320.0090.00615.79
7.1.310.0060.00615.33
7.1.300.0000.01415.52
7.1.290.0000.01415.61
7.1.280.0000.00915.79
7.1.270.0040.01115.91
7.1.260.0060.01015.59
7.1.70.0070.00016.96
7.1.60.0130.01019.46
7.1.50.0110.01416.83
7.1.00.0070.07322.35
7.0.200.0040.00416.64
7.0.140.0070.07021.95
7.0.60.0100.07719.85
7.0.50.0070.08017.81
7.0.40.0200.07320.07
7.0.30.0270.04020.34
7.0.20.0270.05320.17
7.0.10.0230.04320.12
7.0.00.0100.05020.29
5.6.280.0030.09720.91
5.6.210.0130.06320.54
5.6.200.0070.07718.19
5.6.190.0070.04020.62
5.6.180.0300.04020.27
5.6.170.0170.04020.42
5.6.160.0170.03320.48
5.6.150.0100.07718.15
5.6.140.0100.06318.07
5.6.130.0130.06318.12
5.6.120.0030.08720.99
5.6.110.0100.04320.99
5.6.100.0030.08321.04
5.6.90.0000.04320.96
5.6.80.0070.08020.37
5.6.70.0430.06020.36
5.5.350.0170.04720.52
5.5.340.0070.04318.02
5.5.330.0030.04320.25
5.5.320.0230.04320.27
5.5.310.0270.06320.26
5.5.300.0100.04317.95
5.5.290.0070.07018.00
5.5.280.0130.04320.67
5.5.270.0100.08320.95
5.5.260.0170.07320.75
5.5.250.0130.08020.57
5.5.240.0100.08020.32
5.4.450.0330.03319.13
5.4.440.0200.07019.38
5.4.430.0200.05719.41
5.4.420.0200.08019.25
5.4.410.0200.05719.08
5.4.400.0300.06719.09
5.4.390.0170.04318.88
5.4.380.0230.07319.06
5.4.370.0230.06719.14
5.4.360.0170.04719.08
5.4.350.0200.05719.06
5.4.340.0270.03319.14
5.4.320.0270.06319.21
5.4.310.0200.04319.13
5.4.300.0330.04019.17
5.4.290.0270.07319.05
5.4.280.0200.06019.13
5.4.270.0200.07319.24
5.4.260.0270.07319.13
5.4.250.0200.05319.21
5.4.240.0270.06319.04
5.4.230.0200.05018.80
5.4.220.0200.08019.08
5.4.210.0270.06719.13
5.4.200.0170.08319.16
5.4.190.0230.04019.08
5.4.180.0270.06719.12
5.4.170.0370.06319.14
5.4.160.0330.04019.06
5.4.150.0200.06019.07
5.4.140.0270.06716.34
5.4.130.0270.05016.34
5.4.120.0230.04716.45
5.4.110.0230.05316.43
5.4.100.0200.03316.45
5.4.90.0170.06016.38
5.4.80.0270.06716.37
5.4.70.0230.03316.18
5.4.60.0330.06316.04
5.4.50.0270.06716.48
5.4.40.0230.04316.27
5.4.30.0230.06716.46
5.4.20.0230.06716.39
5.4.10.0270.05716.36
5.4.00.0270.04715.71
5.3.290.0200.05014.75
5.3.280.0230.07014.55
5.3.270.0230.07314.55
5.3.260.0170.04714.56
5.3.250.0230.05714.55
5.3.240.0200.07714.69
5.3.230.0230.07014.44
5.3.220.0230.06714.62
5.3.210.0230.07014.41
5.3.200.0270.05714.48
5.3.190.0230.07714.62
5.3.180.0170.05714.52
5.3.170.0270.07014.39
5.3.160.0300.06714.43
5.3.150.0300.06714.44
5.3.140.0200.04014.41
5.3.130.0200.04314.39
5.3.120.0270.06714.49
5.3.110.0230.08014.41
5.3.100.0170.05013.97
5.3.90.0170.04313.90
5.3.80.0170.04713.86
5.3.70.0100.04313.96
5.3.60.0100.04313.95
5.3.50.0170.03713.85
5.3.40.0200.03713.78
5.3.30.0270.04013.84
5.3.20.0230.05313.72
5.3.10.0200.03313.64
5.3.00.0100.05013.73
5.2.170.0200.02312.33
5.2.160.0230.02012.33
5.2.150.0130.03712.33
5.2.140.0230.04712.33
5.2.130.0130.03712.33
5.2.120.0070.03712.33
5.2.110.0200.04312.33
5.2.100.0200.02712.33
5.2.90.0200.03712.33
5.2.80.0170.03312.33
5.2.70.0100.03712.33
5.2.60.0130.03012.33
5.2.50.0270.01712.33
5.2.40.0130.02712.33
5.2.30.0170.02312.33
5.2.20.0070.05312.33
5.2.10.0170.03712.33
5.2.00.0170.05312.33
5.1.60.0170.05012.33
5.1.50.0130.04312.33
5.1.40.0230.05012.33
5.1.30.0130.05312.33
5.1.20.0100.03012.33
5.1.10.0230.02712.33
5.1.00.0170.04312.33
5.0.50.0100.04712.33
5.0.40.0100.02712.33
5.0.30.0130.05312.33
5.0.20.0030.03012.33
5.0.10.0100.01712.33
5.0.00.0030.03312.33
4.4.90.0100.01312.33
4.4.80.0070.01712.33
4.4.70.0130.03312.33
4.4.60.0000.02312.33
4.4.50.0000.03012.33
4.4.40.0100.04012.33
4.4.30.0070.03012.33
4.4.20.0100.01012.33
4.4.10.0070.02012.33
4.4.00.0070.05012.33
4.3.110.0070.03712.33
4.3.100.0000.02712.33
4.3.90.0100.01012.33
4.3.80.0100.02712.33
4.3.70.0030.02012.33
4.3.60.0070.01712.33
4.3.50.0170.02712.33
4.3.40.0130.04712.33
4.3.30.0070.01712.33
4.3.20.0070.03712.33
4.3.10.0030.03012.33
4.3.00.0030.03012.33

preferences:
50.2 ms | 401 KiB | 5 Q