3v4l.org

run code in 300+ PHP versions simultaneously
<?php $p = 1; $a = [1 => "hello", 2 => "hi"]; $b = [3 => "hoi", 4 => "jol"]; $c = array_merge(array_keys($a), array_keys($b)); var_dump($c);

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)
8.3.60.0120.00318.18
8.3.50.0070.00716.13
8.3.40.0040.01118.29
8.3.30.0120.00318.68
8.3.20.0070.00021.66
8.3.10.0000.00820.44
8.3.00.0040.00419.13
8.2.180.0070.01018.14
8.2.170.0040.01122.96
8.2.160.0070.01020.52
8.2.150.0060.00324.18
8.2.140.0080.00024.66
8.2.130.0040.00418.03
8.2.120.0080.00026.35
8.2.110.0000.00922.20
8.2.100.0120.00017.91
8.2.90.0040.00417.63
8.2.80.0000.00817.97
8.2.70.0030.00517.79
8.2.60.0070.00018.22
8.2.50.0040.00418.10
8.2.40.0000.00919.35
8.2.30.0000.00719.05
8.2.20.0040.00418.05
8.2.10.0080.00019.33
8.2.00.0000.00717.99
8.1.280.0080.01225.92
8.1.270.0080.00020.32
8.1.260.0060.00326.35
8.1.250.0070.00028.09
8.1.240.0070.01022.52
8.1.230.0080.00319.09
8.1.220.0000.00817.74
8.1.210.0000.00818.77
8.1.200.0080.00017.23
8.1.190.0000.00917.13
8.1.180.0030.00518.10
8.1.170.0060.00318.36
8.1.160.0040.00418.81
8.1.150.0000.00718.79
8.1.140.0040.00418.70
8.1.130.0030.00521.86
8.1.120.0070.00017.41
8.1.110.0060.00317.41
8.1.100.0050.00317.39
8.1.90.0040.00417.39
8.1.80.0040.00417.37
8.1.70.0040.00417.44
8.1.60.0030.00617.40
8.1.50.0000.00717.45
8.1.40.0040.00417.34
8.1.30.0030.00617.56
8.1.20.0060.00317.54
8.1.10.0000.00717.42
8.1.00.0040.00417.31
8.0.300.0040.00419.55
8.0.290.0070.00316.63
8.0.280.0030.00318.40
8.0.270.0040.00417.10
8.0.260.0030.00318.28
8.0.250.0000.00816.84
8.0.240.0000.00816.89
8.0.230.0030.00316.89
8.0.220.0000.00716.80
8.0.210.0080.00016.89
8.0.200.0030.00316.78
8.0.190.0060.00216.89
8.0.180.0000.00916.90
8.0.170.0040.00416.86
8.0.160.0030.00816.68
8.0.150.0050.00316.69
8.0.140.0000.00716.67
8.0.130.0000.00613.35
8.0.120.0040.00416.87
8.0.110.0040.00416.73
8.0.100.0030.00516.85
8.0.90.0000.00716.71
8.0.80.0060.01616.86
8.0.70.0000.00816.89
8.0.60.0000.00716.89
8.0.50.0040.00416.88
8.0.30.0150.00517.15
8.0.20.0140.00716.97
8.0.10.0040.00416.83
8.0.00.0090.00916.67
7.4.330.0060.00015.55
7.4.320.0040.00416.44
7.4.300.0030.00316.45
7.4.290.0040.00416.44
7.4.280.0000.00816.57
7.4.270.0000.00816.59
7.4.260.0040.00416.49
7.4.250.0070.00016.53
7.4.240.0070.00016.43
7.4.230.0030.00316.55
7.4.220.0000.00816.63
7.4.210.0080.00616.52
7.4.200.0040.00416.18
7.4.160.0070.00916.45
7.4.140.0130.00417.86
7.4.130.0060.01216.38
7.4.120.0120.00616.34
7.4.110.0060.01616.29
7.4.100.0130.01116.45
7.4.90.0030.01316.54
7.4.80.0110.00919.39
7.4.70.0030.01316.48
7.4.60.0130.00316.34
7.4.50.0000.01516.52
7.4.40.0160.00616.41
7.4.00.0120.00314.64
7.3.330.0000.00512.99
7.3.320.0050.00012.94
7.3.310.0030.00316.07
7.3.300.0030.00316.04
7.3.290.0060.00016.20
7.3.280.0070.01016.14
7.3.260.0120.00716.28
7.3.240.0090.01116.29
7.3.230.0000.01616.21
7.3.210.0180.00016.36
7.3.200.0080.01216.30
7.3.190.0080.00916.34
7.3.180.0150.00616.20
7.3.170.0120.00916.27
7.3.160.0080.00816.19
7.3.20.0410.00614.50
7.3.10.0350.00314.68
7.3.00.0480.00314.58
7.2.330.0120.00616.18
7.2.320.0060.01016.36
7.2.310.0150.00316.60
7.2.300.0090.00616.15
7.2.290.0030.01416.53
7.2.150.0400.01014.78
7.2.140.0420.00314.87
7.2.130.0420.01015.01
7.2.120.0290.00714.94
7.2.110.0290.00714.82
7.2.100.0400.00315.04
7.2.90.0360.00615.02
7.2.80.0400.00414.80
7.2.70.0370.00014.68
7.2.60.0350.00714.92
7.2.50.0380.01314.84
7.2.40.0530.00315.10
7.2.30.0260.01014.99
7.2.20.0540.00714.98
7.2.10.0510.00314.91
7.2.00.0380.01015.14
7.1.250.0430.00713.79

preferences:
62.39 ms | 400 KiB | 5 Q