3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array('foo' => "xyz", null => "abc"); $b = array('bar' => "baz", null => "xyz"); print_r(array_merge_recursive($a,$b)); print_(merge_old($a,$b)); print_(merge($a,$b)); function merge(array $a, array $b) { foreach ($b as $key => $value) { if (isset($a[$key])) { if (is_int($key)) { $a[] = $value; } elseif (is_array($value) && is_array($a[$key])) { $a[$key] = merge($a[$key], $value); } else { $a[$key] = $value; } } else { $a[$key] = $value; } } return $a; } function merge_old(array $a, array $b) { foreach ($b as $key => $value) { if (array_key_exists($key, $a)) { if (is_int($key)) { $a[] = $value; } elseif (is_array($value) && is_array($a[$key])) { $a[$key] = merge_old($a[$key], $value); } else { $a[$key] = $value; } } else { $a[$key] = $value; } } return $a; }

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)
8.3.40.0150.00618.70
8.3.30.0070.00720.20
8.3.20.0030.00520.41
8.3.10.0080.00022.05
8.3.00.0070.00022.55
8.2.170.0120.00622.96
8.2.160.0120.00322.09
8.2.150.0040.00424.18
8.2.140.0030.00624.66
8.2.130.0020.00526.16
8.2.120.0080.00020.78
8.2.110.0030.00721.06
8.2.100.0080.00417.84
8.2.90.0040.00419.23
8.2.80.0000.00917.97
8.2.70.0050.00517.63
8.2.60.0050.00317.79
8.2.50.0050.00318.07
8.2.40.0070.00319.75
8.2.30.0000.00919.44
8.2.20.0080.00017.64
8.2.10.0000.00717.81
8.2.00.0000.00817.84
8.1.270.0000.00823.99
8.1.260.0060.00326.35
8.1.250.0030.00628.09
8.1.240.0070.00322.14
8.1.230.0070.00320.61
8.1.220.0000.00817.74
8.1.210.0050.00318.77
8.1.200.0030.00617.22
8.1.190.0040.00417.43
8.1.180.0050.00318.10
8.1.170.0050.00318.55
8.1.160.0070.00018.89
8.1.150.0000.00718.64
8.1.140.0050.00317.33
8.1.130.0040.00417.75
8.1.120.0000.00717.38
8.1.110.0040.00417.34
8.1.100.0040.00417.27
8.1.90.0100.00017.23
8.1.80.0000.00817.37
8.1.70.0000.00817.33
8.1.60.0030.00617.41
8.1.50.0040.00417.41
8.1.40.0060.00317.57
8.1.30.0000.00817.56
8.1.20.0030.00517.54
8.1.10.0040.00417.46
8.1.00.0070.00017.55
8.0.300.0040.00418.77
8.0.290.0000.00716.63
8.0.280.0070.00018.30
8.0.270.0030.00317.07
8.0.260.0060.00016.83
8.0.250.0030.00316.89
8.0.240.0060.00516.85
8.0.230.0000.00716.84
8.0.220.0000.00716.88
8.0.210.0070.00016.75
8.0.200.0000.00616.93
8.0.190.0000.00716.92
8.0.180.0000.00916.92
8.0.170.0040.00416.81
8.0.160.0000.00816.79
8.0.150.0000.00716.90
8.0.140.0040.00416.89
8.0.130.0000.00613.36
8.0.120.0040.00416.75
8.0.110.0050.00316.86
8.0.100.0000.00816.94
8.0.90.0040.00416.90
8.0.80.0040.01116.86
8.0.70.0000.00716.80
8.0.60.0070.00016.99
8.0.50.0000.00816.96
8.0.30.0110.00917.08
8.0.20.0110.00717.40
8.0.10.0070.00017.06
8.0.00.0060.01216.54
7.4.330.0070.00015.00
7.4.320.0030.00316.52
7.4.300.0060.00016.50
7.4.290.0030.00316.52
7.4.280.0030.00616.59
7.4.270.0050.00316.41
7.4.260.0000.00613.22
7.4.250.0050.00216.61
7.4.240.0020.00616.58
7.4.230.0040.00416.67
7.4.220.0200.00716.45
7.4.210.0060.00916.56
7.4.200.0000.00716.25
7.4.190.0040.00416.66
7.4.160.0080.01116.70
7.4.150.0100.00717.40
7.4.140.0080.01017.86
7.4.130.0150.00516.48
7.4.120.0080.00816.55
7.4.110.0030.01516.41
7.4.100.0040.01516.41
7.4.90.0110.00816.46
7.4.80.0150.00919.39
7.4.70.0110.00716.45
7.4.60.0100.00616.49
7.4.50.0080.00016.46
7.4.40.0090.00622.77
7.4.30.0070.01016.57
7.4.10.0060.01316.61
7.4.00.0090.00515.61
7.3.330.0000.00513.31
7.3.320.0050.00013.18
7.3.310.0030.00316.36
7.3.300.0070.00016.26
7.3.290.0080.00616.30
7.3.280.0130.00316.33
7.3.270.0100.00717.40
7.3.260.0100.00716.50
7.3.250.0090.00916.29
7.3.240.0060.01116.57
7.3.230.0140.00316.39
7.3.210.0130.00716.28
7.3.200.0090.00919.39
7.3.190.0100.00716.39
7.3.180.0060.01016.27
7.3.170.0070.01016.56
7.3.160.0000.01816.39
7.3.130.0070.00816.50
7.3.120.0080.00615.69
7.3.110.0070.00716.43
7.3.100.0090.00616.27
7.3.90.0040.00816.35
7.3.80.0030.01316.13
7.3.70.0070.00716.25
7.3.60.0090.00016.04
7.3.50.0000.01416.16
7.3.40.0030.01016.29
7.3.30.0090.00616.19
7.3.20.0100.00417.93
7.3.10.0100.00718.01
7.3.00.0060.00618.11
7.2.330.0130.00316.38
7.2.320.0120.00616.40
7.2.310.0030.01316.56
7.2.300.0190.00316.68
7.2.290.0090.00616.30
7.2.260.0090.00916.18
7.2.250.0100.01016.29
7.2.240.0100.00316.57
7.2.230.0070.00716.53
7.2.220.0030.01016.50
7.2.210.0150.00416.34
7.2.200.0150.00016.33
7.2.190.0040.00816.22
7.2.180.0060.00616.40
7.2.170.0110.00416.36
7.2.160.0030.00916.35
7.2.150.0090.00618.18
7.2.140.0040.01118.24
7.2.130.0160.00018.18
7.2.120.0060.00918.12
7.2.110.0110.00818.15
7.2.100.0000.01018.27
7.2.90.0100.00618.11
7.2.80.0090.00618.19
7.2.70.0040.00718.25
7.2.60.0040.01117.39
7.2.50.0000.01418.07
7.2.40.0100.00718.36
7.2.30.0060.00918.09
7.2.20.0070.01018.09
7.2.10.0110.00018.30
7.2.00.0070.00718.74
7.1.330.0030.01217.33
7.1.320.0000.01417.12
7.1.310.0070.01117.27
7.1.300.0030.01017.28
7.1.290.0000.01517.25
7.1.280.0070.00717.33
7.1.270.0040.01117.18
7.1.260.0000.01017.25
7.1.250.0030.01217.19
7.1.240.0110.00417.27
7.1.230.0100.00317.17
7.1.220.0070.00717.18
7.1.210.0030.01017.23
7.1.200.0060.00616.43
7.1.190.0140.00317.34
7.1.180.0030.01017.32
7.1.170.0080.00817.18
7.1.160.0060.00617.31
7.1.150.0040.00817.24
7.1.140.0140.00317.21
7.1.130.0130.00317.19
7.1.120.0030.00917.12
7.1.110.0030.00917.39
7.1.100.0050.01217.56
7.1.90.0030.01017.13
7.1.80.0030.00617.27
7.1.70.0100.00117.16
7.1.60.0110.00918.30
7.1.50.0100.01117.07
7.1.40.0080.00417.27
7.1.30.0040.00817.21
7.1.20.0060.00917.31
7.1.10.0080.01117.29
7.1.00.0060.03519.86
7.0.330.0090.00616.98
7.0.320.0000.01016.91
7.0.310.0050.00516.99
7.0.300.0120.00316.80
7.0.290.0040.00416.78
7.0.280.0070.01016.94
7.0.270.0060.00616.93
7.0.260.0030.00916.97
7.0.250.0060.00917.05
7.0.240.0030.01316.98
7.0.230.0100.00717.02
7.0.220.0090.00616.85
7.0.210.0060.00916.98
7.0.200.0090.01116.50
7.0.190.0040.01516.89
7.0.180.0060.01017.04
7.0.170.0030.01317.14
7.0.160.0040.01217.06
7.0.150.0030.01417.07
7.0.140.0030.04519.46
7.0.130.0090.00617.15
7.0.120.0110.00416.98
7.0.110.0060.01216.99
7.0.100.0050.04818.41
7.0.90.0100.03718.41
7.0.80.0260.04118.41
7.0.70.0070.03718.37
7.0.60.0170.04118.50
7.0.50.0150.04018.66
7.0.40.0060.03017.47
7.0.30.0100.02317.54
7.0.20.0070.03017.46
7.0.10.0100.02617.44
7.0.00.0090.02517.48
5.6.400.0040.00715.63
5.6.390.0040.01215.87
5.6.380.0060.00915.80
5.6.370.0090.00315.44
5.6.360.0100.00315.64
5.6.350.0060.00915.70
5.6.340.0100.00715.68
5.6.330.0030.01315.64
5.6.320.0060.01015.55
5.6.310.0060.01015.45
5.6.300.0040.01515.50
5.6.290.0140.00715.71
5.6.280.0040.04218.45
5.6.270.0100.00715.80
5.6.260.0030.01015.84
5.6.250.0070.04418.13
5.6.240.0070.04918.17
5.6.230.0080.03618.24
5.6.220.0100.02418.05
5.6.210.0070.04518.19
5.6.200.0080.04718.45
5.6.190.0070.02718.45
5.6.180.0080.04618.38
5.6.170.0080.02618.39
5.6.160.0110.01818.45
5.6.150.0050.02618.36
5.6.140.0020.02818.22
5.6.130.0050.02618.34
5.6.120.0030.02818.33
5.6.110.0060.02418.40
5.6.100.0030.02218.31
5.6.90.0070.02318.21
5.6.80.0000.02418.07
5.6.70.0070.02717.94
5.6.60.0060.02317.95
5.6.50.0030.02717.95
5.6.40.0070.02518.08
5.6.30.0050.02717.96
5.6.20.0070.02217.97
5.6.10.0080.02018.00
5.6.00.0060.02718.04
5.5.380.0090.04417.96
5.5.370.0120.04217.90
5.5.360.0060.04317.96
5.5.350.0110.04518.05
5.5.340.0120.02518.18
5.5.330.0090.04418.28
5.5.320.0080.03018.16
5.5.310.0050.03618.22
5.5.300.0080.02318.28
5.5.290.0060.02518.25
5.5.280.0080.02318.21
5.5.270.0030.02518.32
5.5.260.0040.02718.11
5.5.250.0100.04318.07
5.5.240.0020.02417.82
5.5.230.0070.02417.95
5.5.220.0050.02517.97
5.5.210.0060.02217.96
5.5.200.0050.02617.76
5.5.190.0060.02717.77
5.5.180.0060.02317.93
5.5.170.0030.01515.41
5.5.160.0050.02117.87
5.5.150.0070.02517.90
5.5.140.0070.02317.86
5.5.130.0050.02117.82
5.5.120.0060.02317.80
5.5.110.0020.02817.84
5.5.100.0030.02317.76
5.5.90.0050.02517.80
5.5.80.0080.02517.61
5.5.70.0060.02117.83
5.5.60.0050.02317.80
5.5.50.0070.03317.80
5.5.40.0060.03817.83
5.5.30.0050.02017.78
5.5.20.0050.03717.82
5.5.10.0070.02517.75
5.5.00.0030.02917.82
5.4.450.0130.01615.99
5.4.440.0080.02016.07
5.4.430.0050.02315.95
5.4.420.0050.02915.95
5.4.410.0080.02115.97
5.4.400.0030.02215.94
5.4.390.0030.02315.80
5.4.380.0050.02115.77
5.4.370.0030.02315.91
5.4.360.0050.02515.91
5.4.350.0060.02115.87
5.4.340.0040.02715.95
5.4.330.0060.00612.70
5.4.320.0030.02415.80
5.4.310.0030.02615.77
5.4.300.0030.02315.87
5.4.290.0040.01615.79
5.4.280.0030.02015.82
5.4.270.0080.01715.95
5.4.260.0090.01715.78
5.4.250.0050.02615.96
5.4.240.0050.02215.80
5.4.230.0080.02015.92
5.4.220.0060.04115.97
5.4.210.0080.03515.93
5.4.200.0040.03615.91
5.4.190.0090.03915.95
5.4.180.0070.03815.96
5.4.170.0020.03515.86
5.4.160.0020.04615.90
5.4.150.0060.04015.85
5.4.140.0060.02514.58
5.4.130.0080.04514.60
5.4.120.0020.02814.59
5.4.110.0050.04414.63
5.4.100.0060.02814.54
5.4.90.0040.03714.58
5.4.80.0100.03314.60
5.4.70.0140.03314.54
5.4.60.0060.03514.56
5.4.50.0100.03814.51
5.4.40.0080.03314.57
5.4.30.0100.01814.57
5.4.20.0080.01814.60
5.4.10.0050.03714.50
5.4.00.0020.04014.24
5.3.290.0050.02313.88
5.3.280.0060.02613.74
5.3.270.0080.04313.76
5.3.260.0060.04613.84
5.3.250.0040.02813.83
5.3.240.0040.04813.69
5.3.230.0090.04213.71
5.3.220.0040.04913.76
5.3.210.0030.02413.75
5.3.200.0080.02713.69
5.3.190.0110.03613.77
5.3.180.0080.03313.80
5.3.170.0030.03913.89
5.3.160.0070.04213.83
5.3.150.0100.02313.84
5.3.140.0080.02513.87
5.3.130.0080.03913.80
5.3.120.0050.04313.81
5.3.110.0030.02713.84
5.3.100.0090.03613.58
5.3.90.0030.04513.61
5.3.80.0030.02613.51
5.3.70.0080.03713.39
5.3.60.0050.02713.54
5.3.50.0020.02513.52
5.3.40.0060.02913.54
5.3.30.0030.02713.48
5.3.20.0020.03413.27
5.3.10.0030.03913.29
5.3.00.0030.04313.16
5.2.170.0000.04311.06
5.2.160.0070.05311.25
5.2.150.0100.06011.21
5.2.140.0030.05711.24
5.2.130.0070.07311.17
5.2.120.0000.03011.17
5.2.110.0030.04010.97
5.2.100.0030.03711.16
5.2.90.0100.05711.25
5.2.80.0070.05710.96
5.2.70.0130.04711.12
5.2.60.0070.04311.15
5.2.50.0130.06010.94
5.2.40.0030.06311.14
5.2.30.0000.05010.88
5.2.20.0100.03311.03
5.2.10.0070.04310.96
5.2.00.0000.04310.84
5.1.60.0130.03710.51
5.1.50.0030.04010.51
5.1.40.0030.02310.51
5.1.30.0000.04310.51
5.1.20.0030.04710.51
5.1.10.0070.04310.51
5.1.00.0100.03710.51
5.0.50.0030.02310.51
5.0.40.0000.02710.51
5.0.30.0000.04010.51
5.0.20.0030.02710.51
5.0.10.0000.04710.51
5.0.00.0070.06010.51
4.4.90.0030.03710.51
4.4.80.0000.02010.51
4.4.70.0000.03710.51
4.4.60.0030.03010.51
4.4.50.0070.03010.51
4.4.40.0000.03310.51
4.4.30.0000.01710.51
4.4.20.0030.02710.51
4.4.10.0000.01710.51
4.4.00.0100.04310.51
4.3.110.0000.01710.51
4.3.100.0030.02710.51
4.3.90.0030.03710.51
4.3.80.0030.03310.51
4.3.70.0070.03010.51
4.3.60.0000.02710.51
4.3.50.0000.02010.51
4.3.40.0070.04710.51
4.3.30.0000.02010.51
4.3.20.0000.02010.51
4.3.10.0000.03710.51
4.3.00.0000.02710.51

preferences:
41.23 ms | 400 KiB | 5 Q