3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a1 = [ "a" => 2, "b" => 0, "c" => 5, ]; $a2 = [ "a" => 3, "b" => 9, "c" => 7, "d" => 10, ]; var_export( array_reduce( array_keys($a2), fn($result, $k) => array_merge($result, [$k => ($result[$k] ?? 0) + $a2[$k]]), $a1 ) );

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)
8.5.30.0120.00719.49
8.5.20.0080.00820.10
8.5.10.0110.00716.69
8.5.00.0130.00720.05
8.4.180.0070.00619.78
8.4.170.0120.01024.01
8.4.160.0190.00823.85
8.4.150.0080.00416.79
8.4.140.0130.00717.82
8.4.130.0100.00917.79
8.4.120.0110.01020.52
8.4.110.0070.00518.87
8.4.100.0130.00618.72
8.4.90.0130.00722.68
8.4.80.0110.00918.72
8.4.70.0100.00718.85
8.4.60.0090.01118.93
8.4.50.0050.00420.38
8.4.40.0100.01017.59
8.4.30.0000.02018.65
8.4.20.0180.00319.62
8.4.10.0080.00019.53
8.3.300.0110.00918.96
8.3.290.0120.00820.75
8.3.280.0150.00618.43
8.3.270.0130.00816.63
8.3.260.0100.01016.77
8.3.250.0110.00818.94
8.3.240.0110.00816.48
8.3.230.0110.00816.52
8.3.220.0050.01019.03
8.3.210.0090.00816.80
8.3.200.0140.00516.66
8.3.190.0100.01016.94
8.3.180.0110.00817.40
8.3.170.0140.00418.89
8.3.160.0140.00317.32
8.3.150.0110.00717.17
8.3.140.0110.00718.95
8.3.130.0080.00318.31
8.3.120.0160.00320.86
8.3.110.0070.01020.94
8.3.100.0040.00424.06
8.3.90.0080.00026.77
8.3.80.0040.00718.43
8.3.70.0120.00916.50
8.3.60.0080.00816.57
8.3.50.0140.00418.60
8.3.40.0000.01421.86
8.3.30.0110.00420.38
8.3.20.0140.00723.40
8.3.10.0160.00323.53
8.3.00.0100.01020.64
8.2.300.0110.00920.41
8.2.290.0070.01018.79
8.2.280.0050.00318.38
8.2.270.0140.00417.46
8.2.260.0030.00618.31
8.2.250.0090.00016.50
8.2.240.0040.00417.06
8.2.230.0030.01322.58
8.2.220.0030.00637.54
8.2.210.0130.00626.77
8.2.200.0110.00018.16
8.2.190.0110.00716.63
8.2.180.0120.00916.50
8.2.170.0120.00622.96
8.2.160.0110.00421.02
8.2.150.0070.01321.00
8.2.140.0110.00422.22
8.2.130.0110.00421.92
8.2.120.0100.01021.18
8.2.110.0090.00621.03
8.2.100.0150.00020.93
8.2.90.0100.00620.51
8.2.80.0110.00320.95
8.2.70.0100.00620.49
8.2.60.0040.01120.50
8.2.50.0170.00021.01
8.2.40.0110.00420.68
8.2.30.0090.00920.29
8.2.20.0090.00920.55
8.2.10.0140.00020.63
8.2.00.0110.00720.50
8.1.340.0110.00917.48
8.1.330.0120.00718.47
8.1.320.0090.00717.96
8.1.310.0080.00018.47
8.1.300.0030.00518.00
8.1.290.0090.00330.84
8.1.280.0110.00725.92
8.1.270.0100.00723.83
8.1.260.0090.00623.95
8.1.250.0110.00323.96
8.1.240.0170.00320.35
8.1.230.0070.00720.52
8.1.220.0030.01420.73
8.1.210.0120.00320.33
8.1.200.0080.00820.72
8.1.190.0130.00320.57
8.1.180.0160.00020.32
8.1.170.0000.01420.47
8.1.160.0080.00820.14
8.1.150.0090.00920.61
8.1.140.0140.00320.21
8.1.130.0100.00720.65
8.1.120.0070.00720.54
8.1.110.0070.00720.44
8.1.100.0070.00721.57
8.1.90.0070.00720.33
8.1.80.0060.00921.43
8.1.70.0080.00818.55
8.1.60.0070.00720.19
8.1.50.0120.00320.33
8.1.40.0000.01418.75
8.1.30.0110.00418.99
8.1.20.0130.00619.75
8.1.10.0070.01118.51
8.1.00.0100.00718.61

preferences:
68.61 ms | 987 KiB | 5 Q