3v4l.org

run code in 300+ PHP versions simultaneously
<?php $first = array( 'abc' => array() ); $alias = '30000'; var_dump(array_merge($first, array($alias => [])));

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)
8.3.60.0210.00016.63
8.3.50.0100.00821.96
8.3.40.0040.01118.68
8.3.30.0110.00418.92
8.3.20.0040.00420.21
8.3.10.0080.00021.87
8.3.00.0080.00019.13
8.2.180.0130.01018.29
8.2.170.0040.01122.96
8.2.160.0120.00620.35
8.2.150.0000.00824.18
8.2.140.0080.00024.66
8.2.130.0050.00226.16
8.2.120.0080.00819.64
8.2.110.0040.00420.27
8.2.100.0090.00317.78
8.2.90.0000.00817.84
8.2.80.0040.00417.97
8.2.70.0030.00617.25
8.2.60.0040.00417.91
8.2.50.0000.00818.07
8.2.40.0060.00318.14
8.2.30.0040.00718.14
8.2.20.0040.00417.73
8.2.10.0000.00817.92
8.2.00.0000.00717.62
8.1.280.0070.01325.92
8.1.270.0060.00318.88
8.1.260.0040.00426.35
8.1.250.0040.00428.09
8.1.240.0040.00423.77
8.1.230.0080.00323.88
8.1.220.0030.00517.74
8.1.210.0000.00818.82
8.1.200.0070.00417.23
8.1.190.0050.00317.23
8.1.180.0070.00018.10
8.1.170.0040.00420.46
8.1.160.0040.00421.94
8.1.150.0040.00418.81
8.1.140.0050.00317.25
8.1.130.0030.00317.86
8.1.120.0000.00717.38
8.1.110.0040.00417.36
8.1.100.0030.00517.25
8.1.90.0000.00717.41
8.1.80.0040.00417.28
8.1.70.0000.00717.41
8.1.60.0040.00417.45
8.1.50.0030.00517.33
8.1.40.0030.00617.34
8.1.30.0040.00417.57
8.1.20.0000.00717.48
8.1.10.0050.00217.39
8.1.00.0030.00517.45
8.0.300.0000.00719.83
8.0.290.0040.00416.63
8.0.280.0000.00718.42
8.0.270.0030.00317.22
8.0.260.0030.00517.18
8.0.250.0000.00716.89
8.0.240.0000.00616.90
8.0.230.0070.00016.89
8.0.220.0000.00816.74
8.0.210.0040.00416.70
8.0.200.0000.00616.85
8.0.190.0040.00416.80
8.0.180.0000.00716.83
8.0.170.0050.00316.85
8.0.160.0070.00016.84
8.0.150.0030.00316.83
8.0.140.0040.00416.80
8.0.130.0000.00613.23
8.0.120.0030.00616.64
8.0.110.0070.00016.86
8.0.100.0070.00016.70
8.0.90.0070.00016.68
8.0.80.0070.01416.80
8.0.70.0000.00716.71
8.0.60.0050.00216.80
8.0.50.0000.00716.77
8.0.30.0150.00816.99
8.0.20.0180.00517.40
8.0.10.0000.00816.82
8.0.00.0100.00816.62
7.4.330.0000.00515.13
7.4.320.0060.00016.52
7.4.300.0060.00316.53
7.4.290.0030.00316.37
7.4.280.0060.00316.43
7.4.270.0030.00316.45
7.4.260.0030.00616.31
7.4.250.0060.00316.29
7.4.240.0000.00716.47
7.4.230.0040.00416.50
7.4.220.0100.00716.49
7.4.210.0030.01116.55
7.4.200.0030.00316.34
7.4.160.0060.01316.35
7.4.150.0150.00917.40
7.4.140.0140.00717.86
7.4.130.0070.01016.35
7.4.120.0110.00616.41
7.4.110.0000.01816.37
7.4.100.0130.01016.60
7.4.90.0060.01216.30
7.4.80.0070.01319.39
7.4.70.0060.01216.46
7.4.60.0000.01616.38
7.4.50.0000.00416.50
7.4.40.0070.01016.61
7.4.30.0070.01016.59
7.4.00.0030.01014.53
7.3.330.0000.00712.92
7.3.320.0120.00013.03
7.3.310.0030.00315.98
7.3.300.0030.00315.97
7.3.290.0040.00416.21
7.3.280.0090.00516.20
7.3.270.0090.01217.40
7.3.260.0100.00716.46
7.3.250.0090.01016.42
7.3.240.0140.00716.44
7.3.230.0120.00916.39
7.3.210.0140.01016.40
7.3.200.0030.01319.39
7.3.190.0120.00316.33
7.3.180.0060.01616.36
7.3.170.0090.00916.27
7.3.160.0060.01616.10
7.2.330.0130.00616.30
7.2.320.0070.01716.34
7.2.310.0000.01816.63
7.2.300.0080.01216.25
7.2.290.0070.01016.37
7.2.60.0110.00316.73
7.2.00.0000.01219.43
7.1.200.0070.00315.73
7.1.100.0040.01118.02
7.1.70.0040.00417.03
7.1.60.0090.01619.46
7.1.50.0070.01316.93
7.1.00.0070.07322.33
7.0.200.0030.00616.70
7.0.140.0030.07022.00
7.0.60.0100.08319.92
7.0.50.0070.05317.79
7.0.40.0000.04720.20
7.0.30.0270.06720.18
7.0.20.0400.06720.12
7.0.10.0300.08020.13
7.0.00.0130.05320.16
5.6.280.0100.06321.03
5.6.210.0030.08320.59
5.6.200.0030.05018.08
5.6.190.0070.07020.55
5.6.180.0270.07720.40
5.6.170.0370.05720.50
5.6.160.0070.08320.48
5.6.150.0030.05318.23
5.6.140.0030.05018.18
5.6.130.0070.08318.21
5.6.120.0000.05020.98
5.6.110.0030.08721.12
5.6.100.0070.03720.97
5.6.90.0170.06321.11
5.6.80.0030.07020.36
5.5.350.0100.06320.45
5.5.340.0170.07317.92
5.5.330.0030.09720.56
5.5.320.0000.04320.07
5.5.310.0270.07020.31
5.5.300.0000.06717.88
5.5.290.0070.08717.98
5.5.280.0030.04020.64
5.5.270.0070.08320.74
5.5.260.0000.04720.64
5.5.250.0130.06320.77
5.5.240.0130.05720.24
5.4.450.0100.06019.56
5.4.440.0830.06019.48
5.4.430.0900.04719.47
5.4.420.0800.06319.58
5.4.410.0770.05319.36
5.4.400.0130.05318.60
5.4.390.0230.04018.63
5.4.380.0170.05318.49
5.4.370.0130.06018.49
5.4.360.0170.04718.74
5.4.350.0070.06018.41
5.4.340.0170.05018.49
5.4.320.0170.05018.69
5.4.310.0070.05718.50
5.4.300.0130.05018.62
5.4.290.0230.04318.61
5.4.280.0130.05318.50
5.4.270.0200.04718.61
5.4.260.0130.05018.52
5.4.250.0300.04318.50
5.4.240.0170.05018.69
5.4.230.0030.06018.70
5.4.220.0070.06018.58
5.4.210.0070.05718.66
5.4.200.0070.05716.41
5.4.190.0070.06018.46
5.4.180.0030.06318.70
5.4.170.0030.06318.61
5.4.160.0130.05018.70
5.4.150.0100.05318.69
5.4.140.0130.05316.26
5.4.130.0130.04716.22
5.4.120.0170.06016.16
5.4.110.0070.05316.29
5.4.100.0030.06716.26
5.4.90.0100.05716.04
5.4.80.0230.04716.26
5.4.70.0070.05716.29
5.4.60.0070.05316.32
5.4.50.0100.06316.28
5.4.40.0100.06716.16
5.4.30.0130.04716.27
5.4.20.0200.05016.18
5.4.10.0070.05716.21
5.4.00.0070.05315.70
5.3.290.0200.07314.71
5.3.280.0300.05714.50
5.3.270.0070.06014.68
5.3.260.0200.07014.66
5.3.250.0200.06714.66
5.3.240.0130.07314.72
5.3.230.0200.06014.61
5.3.220.0100.05314.55
5.3.210.0200.06314.57
5.3.200.0170.04714.48
5.3.190.0130.05014.50
5.3.180.0130.04714.46
5.3.170.0070.05714.50
5.3.160.0270.03714.55
5.3.150.0170.04714.66
5.3.140.0130.04714.46
5.3.130.0130.05014.46
5.3.120.0200.05014.57
5.3.110.0130.05314.52
5.3.100.0100.06014.04
5.3.90.0230.06714.02
5.3.80.0130.05314.00
5.3.70.0270.05014.00
5.3.60.0170.05014.04
5.3.50.0100.06313.90
5.3.40.0100.05713.91
5.3.30.0100.05313.82
5.3.20.0170.04313.67
5.3.10.0100.05313.63
5.3.00.0130.06313.58
5.2.170.0100.04711.28
5.2.160.0130.03711.29
5.2.150.0130.04311.07
5.2.140.0170.03311.09
5.2.130.0070.04711.25
5.2.120.0070.04311.13
5.2.110.0100.04011.06
5.2.100.0130.03711.25
5.2.90.0130.03711.06
5.2.80.0100.04011.25
5.2.70.0170.04011.13
5.2.60.0100.04311.20
5.2.50.0100.04711.05
5.2.40.0100.04010.95
5.2.30.0170.03711.11
5.2.20.0130.03711.00
5.2.10.0100.04710.97
5.2.00.0270.03310.71
5.1.60.0170.04310.04
5.1.50.0170.0379.95
5.1.40.0030.0379.96
5.1.30.0070.03710.30
5.1.20.0070.04010.45
5.1.10.0030.04010.14
5.1.00.0070.03710.08
5.0.50.0030.0308.60
5.0.40.0070.0278.44
5.0.30.0000.0478.25
5.0.20.0100.0238.21
5.0.10.0030.0308.15
5.0.00.0030.0438.23
4.4.90.0070.0205.90
4.4.80.0030.0235.88
4.4.70.0070.0205.85
4.4.60.0030.0235.86
4.4.50.0130.0205.95
4.4.40.0070.0335.81
4.4.30.0100.0175.90
4.4.20.0070.0205.96
4.4.10.0070.0205.99
4.4.00.0030.0335.85
4.3.110.0100.0175.89
4.3.100.0070.0205.75
4.3.90.0170.0175.90
4.3.80.0100.0275.79
4.3.70.0000.0235.82
4.3.60.0000.0235.89
4.3.50.0000.0335.84
4.3.40.0000.0375.80
4.3.30.0000.0274.66
4.3.20.0000.0234.54
4.3.10.0030.0234.62
4.3.00.0000.0236.96

preferences:
49.74 ms | 401 KiB | 5 Q