3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = [1, 2, 3]; $b = [4, 5, 6]; $a .= $b; var_dump($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)
8.3.60.0120.00916.63
8.3.50.0110.00416.55
8.3.40.0000.01521.97
8.3.30.0150.00018.50
8.3.20.0040.00424.18
8.3.10.0040.00424.66
8.3.00.0040.00426.16
8.2.180.0040.01116.75
8.2.170.0070.01118.96
8.2.160.0070.00722.96
8.2.150.0040.00425.66
8.2.140.0050.00324.66
8.2.130.0080.00026.16
8.2.120.0080.00019.77
8.2.110.0050.00522.38
8.2.100.0120.00019.57
8.2.90.0080.00018.15
8.2.80.0000.00720.48
8.2.70.0030.00517.63
8.2.60.0050.00317.50
8.2.50.0040.00417.55
8.2.40.0060.01117.72
8.2.30.0060.01017.72
8.2.20.0090.00717.72
8.2.10.0140.00417.72
8.2.00.0100.00617.72
8.1.280.0140.00425.92
8.1.270.0040.00424.66
8.1.260.0040.00426.35
8.1.250.0040.00428.09
8.1.240.0060.00323.88
8.1.230.0030.00920.98
8.1.220.0030.00617.74
8.1.210.0060.00318.77
8.1.200.0040.00417.35
8.1.190.0040.00417.23
8.1.180.0000.00818.10
8.1.170.0120.00417.72
8.1.160.0090.00917.72
8.1.150.0080.00817.72
8.1.140.0050.00519.13
8.1.130.0080.00817.72
8.1.120.0100.00717.72
8.1.110.0130.00317.72
8.1.100.0060.01117.72
8.1.90.0160.00217.72
8.1.80.0080.00817.72
8.1.70.0080.00817.72
8.1.60.0180.00017.72
8.1.50.0120.00617.72
8.1.40.0150.00517.72
8.1.30.0160.00517.72
8.1.20.0130.00417.72
8.1.10.0190.00317.72
8.1.00.0040.01417.72
8.0.300.0070.00021.95
8.0.290.0000.00716.75
8.0.280.0170.00017.72
8.0.270.0080.00817.72
8.0.260.0140.00317.72
8.0.250.0160.00017.72
8.0.240.0080.00817.72
8.0.230.0110.00717.72
8.0.220.0180.00017.72
8.0.210.0100.00717.72
8.0.200.0140.00317.72
8.0.190.0110.00617.72
8.0.180.0160.00217.72
8.0.170.0050.01017.72
8.0.160.0100.00717.72
8.0.150.0090.00917.72
8.0.140.0070.01117.72
8.0.130.0110.00817.72
8.0.120.0100.00518.07
8.0.110.0080.00817.72
8.0.100.0180.00017.72
8.0.90.0120.00417.72
8.0.80.0110.00717.72
8.0.70.0160.00017.72
8.0.60.0110.00617.72
8.0.50.0170.00017.72
8.0.30.0110.00717.72
8.0.20.0180.00017.72
8.0.10.0110.00517.72

preferences:
45.09 ms | 400 KiB | 5 Q