3v4l.org

run code in 300+ PHP versions simultaneously
<?php $first = [ 'abc' => [] ]; $alias = '30000'; var_dump(array_merge($first, [$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)
8.3.70.0110.00418.31
8.3.60.0140.00418.12
8.3.50.0060.01322.06
8.3.40.0140.00018.85
8.3.30.0000.01418.97
8.3.20.0040.00420.21
8.3.10.0040.00421.82
8.3.00.0040.00419.13
8.2.190.0070.01016.63
8.2.180.0100.01018.13
8.2.170.0080.00622.96
8.2.160.0070.01120.39
8.2.150.0000.00824.18
8.2.140.0030.00624.66
8.2.130.0070.00026.16
8.2.120.0090.00019.54
8.2.110.0060.00319.28
8.2.100.0040.00817.63
8.2.90.0000.00719.22
8.2.80.0030.00617.97
8.2.70.0060.00617.50
8.2.60.0080.00017.93
8.2.50.0040.00418.07
8.2.40.0030.00618.22
8.2.30.0030.00718.05
8.2.20.0000.00817.54
8.2.10.0050.00217.91
8.2.00.0000.00817.48
8.1.280.0170.00325.92
8.1.270.0000.00818.88
8.1.260.0040.00426.35
8.1.250.0080.00028.09
8.1.240.0060.00322.20
8.1.230.0040.00717.42
8.1.220.0080.00017.74
8.1.210.0040.00418.77
8.1.200.0070.00417.23
8.1.190.0000.00817.00
8.1.180.0030.00618.10
8.1.170.0030.00720.29
8.1.160.0000.00721.86
8.1.150.0040.00418.84
8.1.140.0000.00717.44
8.1.130.0030.00317.79
8.1.120.0070.00017.29
8.1.110.0040.00417.42
8.1.100.0000.00717.42
8.1.90.0070.00017.39
8.1.80.0050.00217.29
8.1.70.0000.00717.42
8.1.60.0030.00617.48
8.1.50.0040.00417.50
8.1.40.0040.00417.33
8.1.30.0040.00417.59
8.1.20.0000.00717.46
8.1.10.0040.00417.52
8.1.00.0040.00417.50
8.0.300.0050.00218.77
8.0.290.0040.00416.63
8.0.280.0050.00318.30
8.0.270.0070.00017.14
8.0.260.0040.00417.07
8.0.250.0030.00316.86
8.0.240.0030.00316.93
8.0.230.0030.00316.88
8.0.220.0000.00716.80
8.0.210.0000.00716.84
8.0.200.0030.00316.83
8.0.190.0000.00816.78
8.0.180.0000.00716.73
8.0.170.0000.00716.80
8.0.160.0070.00016.89
8.0.150.0000.00716.79
8.0.140.0000.00816.84
8.0.130.0000.00513.23
8.0.120.0040.00416.81
8.0.110.0030.00516.83
8.0.100.0000.00716.93
8.0.90.0030.00516.65
8.0.80.0030.01816.71
8.0.70.0040.00416.84
8.0.60.0000.00816.72
8.0.50.0040.00416.82
8.0.30.0130.01117.07
8.0.20.0120.00817.40
8.0.10.0000.00716.84
8.0.00.0070.01116.73
7.4.330.0000.00515.03
7.4.320.0030.00316.34
7.4.300.0060.00316.43
7.4.290.0050.00316.45
7.4.280.0040.00416.34
7.4.270.0030.00316.45
7.4.260.0050.00316.34
7.4.250.0040.00416.36
7.4.240.0020.00516.50
7.4.230.0070.00016.46
7.4.220.0080.00916.48
7.4.210.0040.01116.50
7.4.200.0030.00316.60
7.4.160.0150.00316.21
7.4.150.0030.01717.40
7.4.140.0130.00917.86
7.4.130.0080.01016.31
7.4.120.0100.01016.52
7.4.110.0040.01416.37
7.4.100.0120.00616.31
7.4.90.0090.00916.34
7.4.80.0110.01119.39
7.4.70.0140.00616.39
7.4.60.0030.01216.41
7.4.50.0060.00316.29
7.4.40.0090.00916.64
7.4.30.0070.01416.52
7.4.00.0150.00014.80
7.3.330.0040.00413.07
7.3.320.0090.00413.03
7.3.310.0060.00316.22
7.3.300.0030.00316.21
7.3.290.0030.00316.05
7.3.280.0080.00816.18
7.3.270.0100.01017.40
7.3.260.0110.00616.39
7.3.250.0100.00716.38
7.3.240.0090.01116.16
7.3.230.0080.00816.43
7.3.210.0110.00616.15
7.3.200.0110.00719.39
7.3.190.0100.00616.25
7.3.180.0110.00516.36
7.3.170.0100.01116.43
7.3.160.0130.00616.39
7.2.330.0060.01216.52
7.2.320.0100.00716.23
7.2.310.0100.00716.26
7.2.300.0140.00316.55
7.2.290.0120.00616.41
7.2.60.0130.00316.22
7.1.200.0030.01015.91
7.1.100.0060.00618.29
7.1.70.0060.00316.88
7.1.60.0060.01919.46
7.1.50.0040.01116.92
7.1.00.0030.07322.45
7.0.200.0070.00016.40
7.0.140.0130.06722.15
7.0.100.0070.06320.01
7.0.90.0070.04719.97
7.0.80.0070.06719.88
7.0.70.0030.07719.89
7.0.60.0100.05719.89
7.0.50.0630.08020.36
7.0.40.0070.05720.15
7.0.30.0100.08720.00
7.0.20.0070.07020.06
7.0.10.0200.07020.03
7.0.00.0070.06720.17
5.6.280.0070.07020.90
5.6.250.0130.08020.59
5.6.240.0100.08020.51
5.6.230.0130.08020.60
5.6.220.0130.07720.61
5.6.210.0070.08020.58
5.6.200.0030.06721.07
5.6.190.0100.08020.94
5.6.180.0070.07021.00
5.6.170.0130.06321.02
5.6.160.0170.07721.02
5.6.150.0070.08021.00
5.6.140.0170.07321.10
5.6.130.0000.09320.96
5.6.120.0100.06721.09
5.6.110.0100.07321.02
5.6.100.0070.08321.09
5.6.90.0100.06320.96
5.6.80.0070.07320.40
5.6.70.0030.03720.48
5.6.60.0070.07720.49
5.6.50.0100.05720.41
5.6.40.0030.08320.37
5.6.30.0030.05320.43
5.6.20.0030.08020.30
5.6.10.0130.07020.36
5.6.00.0070.04320.39
5.5.380.0070.08020.51
5.5.370.0070.06720.44
5.5.360.0100.06020.36
5.5.350.0100.07320.42
5.5.340.0030.08720.64
5.5.330.0100.05320.80
5.5.320.0100.07720.86
5.5.310.0100.08020.86
5.5.300.0100.08320.83
5.5.290.0130.08320.87
5.5.280.0230.06020.87
5.5.270.0130.06720.87
5.5.260.0030.05020.71
5.5.250.0000.04320.59
5.5.240.0000.08020.30
5.5.230.0000.04020.28
5.5.220.0070.07020.05
5.5.210.0100.07720.20
5.5.200.0000.06720.21
5.5.190.0030.08020.09
5.5.180.0130.09320.21
5.5.160.0200.06720.26
5.5.150.0130.07720.17
5.5.140.0030.08720.10
5.5.130.0130.07020.27
5.5.120.0200.06720.25
5.5.110.0070.07720.24
5.5.100.0030.08019.98
5.5.90.0070.05020.16
5.5.80.0130.05020.06
5.5.70.0070.07720.11
5.5.60.0170.05320.10
5.5.50.0100.07020.13
5.5.40.0000.07720.15
5.5.30.0000.07720.14
5.5.20.0100.07720.07
5.5.10.0130.07020.09
5.5.00.0030.08020.02
5.4.450.0070.07719.43
5.4.440.0030.05319.37
5.4.430.0070.08719.37
5.4.420.0000.08019.35
5.4.410.0070.07319.16
5.4.400.0070.07718.91
5.4.390.0030.08019.13
5.4.380.0100.07319.23
5.4.370.0100.07019.04
5.4.360.0100.06718.92
5.4.350.0200.06319.13
5.4.340.0100.06019.06
5.4.320.0100.07319.04
5.4.310.0170.06718.98
5.4.300.0130.05318.98
5.4.290.0130.06019.07
5.4.280.0070.04719.12
5.4.270.0100.06319.04
5.4.260.0030.06318.98
5.4.250.0070.06319.13
5.4.240.0130.06319.22
5.4.230.0100.06319.04
5.4.220.0100.07318.97
5.4.210.0070.07319.13
5.4.200.0030.06018.80
5.4.190.0070.07019.02
5.4.180.0130.04718.89
5.4.170.0100.07019.13
5.4.160.0030.07719.21
5.4.150.0070.06718.79
5.4.140.0130.06716.39
5.4.130.0130.07016.29
5.4.120.0170.04316.29
5.4.110.0130.06716.26
5.4.100.0030.07716.34
5.4.90.0070.07016.44
5.4.80.0030.04016.39
5.4.70.0030.07016.41
5.4.60.0030.07716.34
5.4.50.0030.07016.38
5.4.40.0070.07716.27
5.4.30.0100.06316.40
5.4.20.0170.05016.36
5.4.10.0100.06716.18
5.4.00.0100.07315.86
5.3.290.0070.07714.67
5.3.280.0100.06314.58
5.3.270.0070.04014.55
5.3.260.0130.06014.47
5.3.250.0000.05014.60
5.3.240.0170.06314.61
5.3.230.0070.07714.54
5.3.220.0070.07014.58
5.3.210.0030.08014.43
5.3.200.0030.07314.56
5.3.190.0100.07014.56
5.3.180.0070.06314.42
5.3.170.0000.04014.53
5.3.160.0100.07314.55
5.3.150.0130.07014.49
5.3.140.0030.07014.54
5.3.130.0030.05014.42
5.3.120.0070.07314.39
5.3.110.0030.07714.53
5.3.100.0070.07714.03
5.3.90.0000.07313.88
5.3.80.0070.06713.87
5.3.70.0070.07013.96
5.3.60.0070.07013.99
5.3.50.0000.04013.89
5.3.40.0070.07313.73
5.3.30.0030.07313.89
5.3.20.0100.06713.68
5.3.10.0070.06713.62
5.3.00.0130.06713.61
5.2.170.0030.06312.52
5.2.160.0070.05712.52
5.2.150.0100.04312.52
5.2.140.0070.05712.52
5.2.130.0030.06312.52
5.2.120.0000.06712.52
5.2.110.0030.06312.52
5.2.100.0100.05312.52
5.2.90.0100.06012.52
5.2.80.0100.06312.52
5.2.70.0000.06312.52
5.2.60.0030.03312.52
5.2.50.0030.06712.52
5.2.40.0030.05712.52
5.2.30.0070.03712.52
5.2.20.0070.05712.52
5.2.10.0030.05312.52
5.2.00.0070.04312.52
5.1.60.0070.05312.52
5.1.50.0030.05712.52
5.1.40.0100.04712.52
5.1.30.0070.05012.52
5.1.20.0070.04012.52
5.1.10.0130.05012.52
5.1.00.0130.04312.52
5.0.50.0000.04712.52
5.0.40.0000.05012.52
5.0.30.0030.06312.52
5.0.20.0030.04312.52
5.0.10.0030.04312.52
5.0.00.0000.06012.52
4.4.90.0030.03312.52
4.4.80.0100.03012.52
4.4.70.0030.03312.52
4.4.60.0070.03312.52
4.4.50.0030.03712.52
4.4.40.0030.04012.52
4.4.30.0070.03012.52
4.4.20.0030.03312.52
4.4.10.0000.03712.52
4.4.00.0070.05012.52
4.3.110.0000.03012.52
4.3.100.0000.03712.52
4.3.90.0030.02712.52
4.3.80.0030.03012.52
4.3.70.0070.02012.52
4.3.60.0070.03012.52
4.3.50.0030.03712.52
4.3.40.0070.03712.52
4.3.30.0030.03312.52
4.3.20.0030.02312.52
4.3.10.0030.03312.52
4.3.00.0030.03312.52

preferences:
30.35 ms | 401 KiB | 5 Q