3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = [3 => ['a' => 'a1'], 4 => ['a' => 'a2']]; $b = [3 => ['b' => 'b1'], 4 => ['b' => 'b2']]; var_dump(array_merge($a, $b));

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)
8.3.60.0070.01018.31
8.3.50.0100.01022.11
8.3.40.0070.01018.61
8.3.30.0110.00418.46
8.3.20.0040.00418.45
8.3.10.0040.00420.84
8.3.00.0070.00023.48
8.2.180.0040.01518.16
8.2.170.0110.00422.96
8.2.160.0070.00720.52
8.2.150.0030.00524.18
8.2.140.0080.00024.66
8.2.130.0050.00226.16
8.2.120.0110.00421.07
8.2.110.0090.00020.52
8.2.100.0060.00617.72
8.2.90.0070.00019.23
8.2.80.0040.00418.04
8.2.70.0060.00317.49
8.2.60.0110.00017.93
8.2.50.0080.00018.07
8.2.40.0040.00418.22
8.2.30.0050.00219.67
8.2.20.0000.00717.58
8.2.10.0030.00717.71
8.2.00.0080.00017.51
8.1.280.0100.00725.92
8.1.270.0080.00023.99
8.1.260.0040.00426.35
8.1.250.0040.00428.09
8.1.240.0040.00422.54
8.1.230.0100.00020.98
8.1.220.0080.00018.77
8.1.210.0090.00018.80
8.1.200.0060.00317.35
8.1.190.0000.00717.40
8.1.180.0040.00418.10
8.1.170.0000.00818.59
8.1.160.0040.00418.73
8.1.150.0030.00618.47
8.1.140.0030.00517.23
8.1.130.0030.00317.81
8.1.120.0000.00717.43
8.1.110.0030.00617.36
8.1.100.0040.00417.37
8.1.90.0000.00717.40
8.1.80.0070.00017.32
8.1.70.0000.00717.27
8.1.60.0050.00317.51
8.1.50.0000.00717.40
8.1.40.0000.00817.38
8.1.30.0060.00317.58
8.1.20.0040.00417.52
8.1.10.0000.00717.45
8.1.00.0040.00417.25
8.0.300.0040.00419.90
8.0.290.0000.00717.18
8.0.280.0040.00418.25
8.0.270.0030.00317.18
8.0.260.0060.00016.68
8.0.250.0080.00016.90
8.0.240.0000.00816.75
8.0.230.0070.00016.89
8.0.220.0050.00216.72
8.0.210.0030.00316.70
8.0.200.0000.00616.88
8.0.190.0000.00816.78
8.0.180.0030.00516.92
8.0.170.0000.00716.81
8.0.160.0070.00016.73
8.0.150.0060.00316.64
8.0.140.0040.00416.77
8.0.130.0000.00913.22
8.0.120.0040.00416.68
8.0.110.0030.00716.68
8.0.100.0020.00516.64
8.0.90.0000.00716.65
8.0.80.0130.00316.82
8.0.70.0050.00316.61
8.0.60.0000.00716.69
8.0.50.0060.00316.80
8.0.30.0110.00916.89
8.0.20.0110.01117.40
8.0.10.0050.00317.05
8.0.00.0120.00816.58
7.4.330.0060.00014.59
7.4.320.0000.00616.54
7.4.300.0030.00316.57
7.4.290.0000.00816.38
7.4.280.0080.00416.39
7.4.270.0030.00316.51
7.4.260.0030.00313.20
7.4.250.0030.00316.41
7.4.240.0030.00316.47
7.4.230.0030.00316.47
7.4.220.0100.01316.46
7.4.210.0080.00816.49
7.4.200.0000.00816.27
7.4.190.0040.00416.35
7.4.160.0040.01116.54
7.4.150.0120.00817.40
7.4.140.0150.00317.86
7.4.130.0090.00916.38
7.4.120.0070.01016.50
7.4.110.0110.00716.24
7.4.100.0140.00316.21
7.4.90.0150.00316.49
7.4.80.0030.01319.37
7.4.70.0160.00016.21
7.4.60.0130.00316.60
7.4.50.0080.00016.44
7.4.40.0040.01122.27
7.4.30.0070.01016.39
7.4.10.0090.00914.77
7.4.00.0090.00615.00
7.3.330.0050.00012.98
7.3.320.0050.00013.00
7.3.310.0070.00016.00
7.3.300.0070.00016.18
7.3.290.0110.00416.08
7.3.280.0070.00716.15
7.3.270.0140.01117.40
7.3.260.0150.00218.24
7.3.250.0110.01016.12
7.3.240.0080.00816.25
7.3.230.0110.00516.39
7.3.210.0100.00716.00
7.3.200.0090.00719.39
7.3.190.0120.00316.15
7.3.180.0170.00016.37
7.3.170.0080.00816.38
7.3.160.0040.01216.30
7.3.130.0060.00914.72
7.3.120.0050.01314.55
7.3.110.0090.00914.85
7.3.100.0060.00914.90
7.3.90.0030.01414.60
7.3.80.0070.00714.38
7.3.70.0030.00614.73
7.3.60.0060.00614.77
7.3.50.0030.00614.84
7.3.40.0090.00014.75
7.3.30.0060.00614.80
7.3.20.0090.00616.45
7.3.10.0000.00916.14
7.3.00.0070.00716.24
7.2.330.0130.00616.17
7.2.320.0040.01216.48
7.2.310.0000.01616.14
7.2.300.0090.01316.52
7.2.290.0070.01016.44
7.2.260.0090.00814.77
7.2.250.0120.00614.48
7.2.240.0060.00914.84
7.2.230.0070.01014.73
7.2.220.0000.01214.54
7.2.210.0090.00314.34
7.2.200.0040.00714.58
7.2.190.0030.01314.84
7.2.180.0040.01114.68
7.2.170.0030.01014.88
7.2.160.0120.00614.89
7.2.150.0030.01216.66
7.2.140.0030.01016.45
7.2.130.0080.00816.79
7.2.120.0090.00616.51
7.2.110.0100.00016.66
7.2.100.0030.01016.63
7.2.90.0030.00616.55
7.2.80.0080.00816.71
7.2.70.0080.00816.91
7.2.60.0100.00516.73
7.2.50.0090.00616.69
7.2.40.0030.01216.66
7.2.30.0130.00316.80
7.2.20.0040.01216.74
7.2.10.0000.01216.27
7.2.00.0030.01216.62
7.1.330.0000.01115.93
7.1.320.0100.00315.61
7.1.310.0000.01416.01
7.1.300.0000.00915.63
7.1.290.0000.01015.75
7.1.280.0030.00715.50
7.1.270.0120.00015.39
7.1.260.0070.00315.72
7.1.250.0030.00615.41
7.1.240.0030.00915.86
7.1.230.0110.00315.64
7.1.220.0000.01515.46
7.1.210.0040.00715.77
7.1.200.0100.00315.62
7.1.190.0040.00815.76
7.1.180.0040.00815.68
7.1.170.0040.00415.71
7.1.160.0080.00815.56
7.1.150.0060.00615.42
7.1.140.0040.01115.83
7.1.130.0030.01015.66
7.1.120.0130.00015.46
7.1.110.0030.00615.78
7.1.100.0040.01215.69
7.1.90.0140.00015.74
7.1.80.0090.00315.78
7.1.70.0000.01116.13
7.1.60.0030.01417.55
7.1.50.0060.01216.39
7.1.40.0100.00715.67
7.1.30.0060.00915.72
7.1.20.0130.00315.78
7.1.10.0110.00715.59
7.1.00.0020.02219.04
7.0.330.0030.01015.40
7.0.320.0070.01015.30
7.0.310.0000.01615.13
7.0.300.0060.00915.28
7.0.290.0060.00615.46
7.0.280.0060.00315.10
7.0.270.0030.01014.99
7.0.260.0030.00515.49
7.0.250.0100.00015.28
7.0.240.0040.01115.48
7.0.230.0000.01115.58
7.0.220.0030.00715.33
7.0.210.0030.01015.36
7.0.200.0040.00716.09
7.0.190.0000.00915.21
7.0.180.0130.00015.38
7.0.170.0100.00315.27
7.0.160.0070.00315.39
7.0.150.0040.00815.23
7.0.140.0080.03518.63
7.0.130.0000.00815.10
7.0.120.0030.01015.34
7.0.110.0050.00315.42
7.0.100.0070.00715.39
7.0.90.0000.00915.48
7.0.80.0060.00615.23
7.0.70.0030.04918.59
7.0.60.0020.04218.43
7.0.50.0080.02918.71
7.0.40.0000.03616.74
7.0.30.0090.04316.72
7.0.20.0060.03816.77
7.0.10.0100.04116.83
7.0.00.0050.04416.71
5.6.400.0040.00714.59
5.6.390.0060.00914.10
5.6.380.0110.00014.41
5.6.370.0040.00814.47
5.6.360.0080.00413.96
5.6.350.0050.00514.19
5.6.340.0040.01113.88
5.6.330.0060.01014.22
5.6.320.0060.00614.15
5.6.310.0040.01214.08
5.6.300.0000.01014.50
5.6.290.0070.00714.56
5.6.280.0020.04217.60
5.6.270.0080.00414.28
5.6.260.0030.01214.10
5.6.250.0040.01413.95
5.6.240.0070.00714.29
5.6.230.0000.00914.12
5.6.220.0070.04417.42
5.6.210.0020.04617.53
5.6.200.0070.03717.54
5.6.190.0070.02217.54
5.6.180.0030.04317.43
5.6.170.0060.03617.63
5.6.160.0080.02117.62
5.6.150.0030.04317.65
5.6.140.0050.03417.69
5.6.130.0090.03317.64
5.6.120.0010.04317.75
5.6.110.0060.02317.61
5.6.100.0050.04517.49
5.6.90.0080.03517.55
5.6.80.0050.03717.23
5.6.70.0080.03817.16
5.6.60.0050.04217.30
5.6.50.0050.03617.26
5.6.40.0100.04017.18
5.6.30.0020.03717.34
5.6.20.0060.04117.33
5.6.10.0060.03617.37
5.6.00.0100.04017.28
5.5.380.0030.01014.23
5.5.370.0000.01214.35
5.5.360.0030.02517.22
5.5.350.0050.03217.22
5.5.340.0000.03717.46
5.5.330.0070.02817.61
5.5.320.0030.02717.49
5.5.310.0020.04017.51
5.5.300.0030.04817.65
5.5.290.0080.03317.44
5.5.280.0030.02517.47
5.5.270.0020.04317.55
5.5.260.0080.04217.30
5.5.250.0080.03017.43
5.5.240.0040.04217.09
5.5.230.0050.02417.01
5.5.220.0060.04417.12
5.5.210.0100.03617.13
5.5.200.0100.03817.02
5.5.190.0050.02517.05
5.5.180.0020.03717.03
5.5.170.0060.00914.26
5.5.160.0060.04017.01
5.5.150.0030.03317.11
5.5.140.0000.04617.02
5.5.130.0020.04417.12
5.5.120.0100.04217.18
5.5.110.0020.03917.19
5.5.100.0050.03017.09
5.5.90.0040.04116.96
5.5.80.0070.02717.15
5.5.70.0020.03117.12
5.5.60.0050.03817.10
5.5.50.0100.03217.18
5.5.40.0060.02317.04
5.5.30.0030.04617.04
5.5.20.0030.04316.94
5.5.10.0050.02417.13
5.5.00.0020.03217.07
5.4.450.0000.04115.85
5.4.440.0020.02315.99
5.4.430.0050.02215.96
5.4.420.0130.03615.83
5.4.410.0030.03215.90
5.4.400.0050.01815.76
5.4.390.0050.04215.84
5.4.380.0050.03615.75
5.4.370.0090.03615.84
5.4.360.0030.04215.84
5.4.350.0080.03715.80
5.4.340.0030.02715.81
5.4.330.0070.00012.57
5.4.320.0050.03815.77
5.4.310.0030.04115.90
5.4.300.0060.03815.82
5.4.290.0070.03315.85
5.4.280.0010.03815.78
5.4.270.0040.04215.81
5.4.260.0020.03015.83
5.4.250.0030.02015.77
5.4.240.0040.03715.68
5.4.230.0030.03915.83
5.4.220.0070.02215.82
5.4.210.0060.03315.79
5.4.200.0080.02315.81
5.4.190.0010.02315.68
5.4.180.0020.03915.79
5.4.170.0080.03815.85
5.4.160.0030.04015.84
5.4.150.0070.04215.84
5.4.140.0020.04414.45
5.4.130.0050.02214.42
5.4.120.0060.02714.42
5.4.110.0020.04214.50
5.4.100.0050.02214.42
5.4.90.0030.02514.39
5.4.80.0020.02414.43
5.4.70.0030.02214.40
5.4.60.0030.02014.46
5.4.50.0030.02114.46
5.4.40.0000.04314.43
5.4.30.0030.02214.43
5.4.20.0040.02914.48
5.4.10.0030.04114.38
5.4.00.0030.04514.17
5.3.290.0010.02513.58
5.3.280.0030.04013.58
5.3.270.0020.04413.58
5.3.260.0020.02313.49
5.3.250.0030.02013.58
5.3.240.0000.04213.54
5.3.230.0060.04013.58
5.3.220.0030.03813.57
5.3.210.0060.02313.48
5.3.200.0030.02613.56
5.3.190.0030.02313.56
5.3.180.0000.02113.55
5.3.170.0000.02313.48
5.3.160.0010.02613.56
5.3.150.0020.02213.48
5.3.140.0000.02513.53
5.3.130.0020.03213.55
5.3.120.0010.02813.56
5.3.110.0030.04313.51
5.3.100.0050.03713.31
5.3.90.0020.04013.23
5.3.80.0070.04013.29
5.3.70.0000.03613.28
5.3.60.0020.03313.17
5.3.50.0020.03513.21
5.3.40.0070.02213.24
5.3.30.0020.02613.23
5.3.20.0040.02013.13
5.3.10.0090.03613.05
5.3.00.0030.03712.99
5.2.170.0000.06312.46
5.2.160.0000.04012.46
5.2.150.0000.03012.46
5.2.140.0000.05312.46
5.2.130.0000.04012.46
5.2.120.0000.05712.46
5.2.110.0000.04712.46
5.2.100.0070.05712.46
5.2.90.0070.05312.46
5.2.80.0030.04312.46
5.2.70.0030.04312.46
5.2.60.0130.05712.46
5.2.50.0000.06012.46
5.2.40.0000.05312.46
5.2.30.0030.06012.46
5.2.20.0030.04712.46
5.2.10.0100.04012.46
5.2.00.0000.05312.46
5.1.60.0030.05312.46
5.1.50.0030.03012.46
5.1.40.0070.04312.46
5.1.30.0000.04712.46
5.1.20.0030.04312.46
5.1.10.0030.04712.46
5.1.00.0030.04712.46
5.0.50.0000.04012.46
5.0.40.0000.02712.46
5.0.30.0070.04012.46
5.0.20.0070.03012.46
5.0.10.0070.03712.46
5.0.00.0030.05712.46
4.4.90.0070.03012.46
4.4.80.0000.02312.46
4.4.70.0030.03312.46
4.4.60.0030.03012.46
4.4.50.0000.03712.46
4.4.40.0030.04012.46
4.4.30.0000.03012.46
4.4.20.0070.03012.46
4.4.10.0070.01012.46
4.4.00.0000.02312.46
4.3.110.0000.03312.46
4.3.100.0000.02712.46
4.3.90.0030.02312.46
4.3.80.0000.06012.46
4.3.70.0000.03312.46
4.3.60.0000.02712.46
4.3.50.0030.02012.46
4.3.40.0000.03312.46
4.3.30.0000.03712.46
4.3.20.0000.03712.46
4.3.10.0030.03312.46
4.3.00.0070.03012.46

preferences:
45.58 ms | 401 KiB | 5 Q