3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = ['45', '21', '45', '45', '45', '29', '35', '35', '21']; $result = []; $last = null; foreach ($array as $v) { if ($last !== $v) { unset($ref); $result[] =& $ref; } $ref[] = $v; $last = $v; } var_export($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)
8.5.10.0070.01019.77
8.5.00.0130.00820.14
8.4.160.0140.00723.70
8.4.150.0020.00114.05
8.4.140.0110.01017.52
8.4.130.0050.00418.91
8.4.120.0130.00618.72
8.4.110.0140.00618.92
8.4.100.0110.00817.54
8.4.90.0090.01020.31
8.4.80.0040.00420.63
8.4.70.0110.00718.91
8.4.60.0030.00520.84
8.4.50.0090.01118.75
8.4.40.0060.00317.63
8.4.30.0100.01024.20
8.4.20.0130.00619.32
8.4.10.0060.00619.29
8.3.280.0090.01118.43
8.3.270.0160.00316.54
8.3.260.0110.00816.36
8.3.250.0120.00616.68
8.3.240.0040.00416.66
8.3.230.0090.00816.73
8.3.220.0120.00620.75
8.3.210.0070.01016.53
8.3.200.0040.00416.84
8.3.190.0090.00518.88
8.3.180.0050.00419.18
8.3.170.0110.00718.85
8.3.160.0040.01420.56
8.3.150.0150.00317.18
8.3.140.0070.00316.45
8.3.130.0080.00016.57
8.3.120.0310.01016.31
8.3.110.0330.01016.55
8.3.100.0380.01016.45
8.3.90.0270.02016.52
8.3.80.0400.00716.15
8.3.70.0380.01016.56
8.3.60.0350.01216.21
8.3.50.0390.01316.18
8.3.40.0250.00317.23
8.3.30.0240.00817.28
8.3.20.0170.01417.22
8.3.10.0220.00417.14
8.3.00.0110.00817.23
8.2.290.0090.01017.08
8.2.280.0110.00720.01
8.2.270.0070.01116.66
8.2.260.0090.00917.14
8.2.250.0050.00318.37
8.2.240.0170.00716.39
8.2.230.0320.00016.23
8.2.220.0290.00616.36
8.2.210.0300.00816.36
8.2.200.0250.01116.30
8.2.190.0250.01116.07
8.2.180.0300.01916.28
8.2.170.0410.00717.27
8.2.160.0350.00417.47
8.2.150.0270.00717.40
8.2.140.0360.00617.46
8.2.130.0390.00417.45
8.2.120.0400.00317.44
8.2.110.0240.01817.77
8.2.100.0270.01317.61
8.2.90.0330.00817.46
8.2.80.0380.00317.36
8.2.70.0420.00017.58
8.2.60.0280.01417.50
8.2.50.0240.01717.21
8.2.40.0270.01017.55
8.2.30.0350.00417.19
8.2.20.0290.00817.22
8.2.10.0260.01417.52
8.2.00.0370.00317.52
8.1.330.0060.00316.21
8.1.320.0150.00421.82
8.1.310.0080.00018.21
8.1.300.0380.00515.64
8.1.290.0370.00715.86
8.1.280.0290.01116.05
8.1.270.0330.01017.09
8.1.260.0350.00317.38
8.1.250.0330.00717.27
8.1.240.0220.00817.13
8.1.230.0190.01117.38
8.1.220.0160.00817.36
8.1.210.0250.00616.97
8.1.200.0340.00516.75
8.1.190.0220.01516.92
8.1.180.0300.00817.13
8.1.170.0310.00717.25
8.1.160.0310.00617.13
8.1.150.0280.00817.05
8.1.140.0220.01517.20
8.1.130.0320.00317.30
8.1.120.0170.01317.31
8.1.110.0320.00016.93
8.1.100.0290.00717.39
8.1.90.0270.00917.34
8.1.80.0310.00617.23
8.1.70.0310.00717.14
8.1.60.0330.00617.08
8.1.50.0300.01017.45
8.1.40.0350.00417.11
8.1.30.0280.01117.36
8.1.20.0250.01517.41
8.1.10.0360.01117.27
8.1.00.0400.00717.07

preferences:
36.41 ms | 403 KiB | 5 Q