3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = [ [1 => 2], [1 => 2], [2 => 1], [3 => 1], ]; $result = []; foreach ($array as $row) { $k = key($row); if (!isset($ref[$k])) { $ref[$k] = 0; $result[][$k] =& $ref[$k]; } $ref[$k] += $row[$k]; } var_export($result);

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)
8.5.10.0130.00616.84
8.5.00.0110.01019.92
8.4.160.0110.00923.94
8.4.150.0020.00014.05
8.4.140.0120.00917.53
8.4.130.0120.00917.82
8.4.120.0110.00824.13
8.4.110.0110.01120.49
8.4.100.0140.00517.44
8.4.90.0110.00820.46
8.4.80.0030.00519.14
8.4.70.0150.00718.77
8.4.60.0040.00422.27
8.4.50.0060.00318.85
8.4.40.0150.00617.63
8.4.30.0310.01717.16
8.4.20.0430.00717.63
8.4.10.0360.00717.45
8.3.280.0130.00818.48
8.3.270.0110.00916.64
8.3.260.0100.01016.41
8.3.250.0140.00516.62
8.3.240.0080.00717.28
8.3.230.0170.00316.68
8.3.220.0080.00618.84
8.3.210.0060.00316.80
8.3.200.0030.00616.84
8.3.190.0060.00417.01
8.3.180.0090.01019.14
8.3.170.0070.01117.05
8.3.160.0340.01216.59
8.3.150.0380.00716.57
8.3.140.0350.00616.35
8.3.130.0360.00716.48
8.3.120.0330.01216.57
8.3.110.0310.00916.46
8.3.100.0360.01016.36
8.3.90.0420.00416.72
8.3.80.0380.00816.44
8.3.70.0310.01916.20
8.3.60.0390.01016.11
8.3.50.0290.01416.53
8.3.40.0360.00317.46
8.3.30.0360.00017.46
8.3.20.0320.00317.66
8.3.10.0170.01717.27
8.3.00.0090.01317.45
8.2.290.0080.00516.84
8.2.280.0160.00418.49
8.2.270.0320.00616.56
8.2.260.0280.00916.52
8.2.250.0260.01316.72
8.2.240.0300.01516.27
8.2.230.0260.01316.65
8.2.220.0310.00916.09
8.2.210.0340.00416.26
8.2.200.0260.01316.22
8.2.190.0320.00716.54
8.2.180.0310.00716.28
8.2.170.0280.00917.72
8.2.160.0320.00617.50
8.2.150.0290.01017.46
8.2.140.0310.01017.37
8.2.130.0340.00617.61
8.2.120.0310.00917.77
8.2.110.0360.00317.80
8.2.100.0330.00317.55
8.2.90.0260.01117.53
8.2.80.0390.00417.43
8.2.70.0270.01117.56
8.2.60.0350.00617.29
8.2.50.0380.00317.49
8.2.40.0280.00717.47
8.2.30.0220.01417.55
8.2.20.0300.00717.34
8.2.10.0290.00717.28
8.2.00.0300.00617.64
8.1.320.0120.00718.06

preferences:
31.11 ms | 403 KiB | 5 Q