3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = ['one', 'two', 'three', 'foo', 'bar', 'etc']; $prev = ''; foreach ($arr as &$ref) { $ref = $prev . $ref; $prev = $ref; } var_export($arr); $arr = ['one', 'two', 'three', 'foo', 'bar', 'etc']; var_export( array_map( function($v) { static $prev = ''; $v = $prev . $v; $prev = $v; return $v; }, $arr ) );

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)
8.5.10.0120.00619.76
8.5.00.0120.00921.74
8.4.160.0120.00823.80
8.4.150.0020.00014.05
8.4.140.0130.00917.83
8.4.130.0140.00817.67
8.4.120.0130.00722.59
8.4.110.0100.01118.44
8.4.100.0130.00817.64
8.4.90.0100.01020.56
8.4.80.0060.00218.77
8.4.70.0080.01218.73
8.4.60.0120.00820.57
8.4.50.0110.00918.46
8.4.40.0100.01017.94
8.4.30.0070.01320.84
8.4.20.0070.01319.49
8.4.10.0060.00919.32
8.3.280.0030.00014.05
8.3.270.0090.01016.42
8.3.260.0130.00616.50
8.3.250.0080.01117.16
8.3.240.0060.00416.35
8.3.230.0050.00316.75
8.3.220.0050.00319.11
8.3.210.0120.01018.52
8.3.200.0040.00516.49
8.3.190.0070.00517.07
8.3.180.0130.00622.50
8.3.170.0130.00317.03
8.3.160.0070.01116.80
8.3.150.0040.00416.50
8.3.140.0070.00016.73
8.3.130.0000.00818.37
8.3.120.0100.00020.61
8.3.110.0310.00716.59
8.3.100.0350.00716.27
8.3.90.0350.00716.13
8.3.80.0500.00316.25
8.3.70.0420.01416.25
8.3.60.0350.00916.50
8.3.50.0390.01016.25
8.3.40.0270.01517.25
8.3.30.0250.00317.13
8.3.20.0400.00317.38
8.3.10.0280.00817.38
8.3.00.0110.00717.38
8.2.290.0120.00717.23
8.2.280.0100.01018.40
8.2.270.0070.01116.67
8.2.260.0090.00916.58
8.2.250.0110.00416.64
8.2.240.0130.00717.30
8.2.230.0140.00416.51
8.2.220.0200.00816.10
8.2.210.0280.00416.30
8.2.200.0190.00016.48
8.2.190.0160.00916.50
8.2.180.0270.00316.36
8.2.170.0330.01017.50
8.2.160.0350.00017.38
8.2.150.0450.00317.25
8.2.140.0230.00317.38
8.2.130.0180.00417.38
8.2.120.0340.00917.50
8.2.110.0310.00017.38
8.2.100.0300.00717.34
8.2.90.0260.01617.46
8.2.80.0330.01017.25
8.2.70.0280.00617.38
8.2.60.0220.00917.13
8.2.50.0330.01017.47
8.2.40.0310.01017.38
8.2.30.0330.00917.38
8.2.20.0250.01317.36
8.2.10.0340.00917.38
8.2.00.0080.01017.50
8.1.330.0130.00916.26
8.1.320.0110.00916.04
8.1.310.0000.00818.34
8.1.300.0090.00618.01
8.1.290.0350.00616.13
8.1.280.0230.00715.86
8.1.270.0140.00517.29
8.1.260.0330.00717.13
8.1.250.0330.00717.25
8.1.240.0270.01217.13
8.1.230.0310.01017.13
8.1.220.0190.00317.25
8.1.210.0100.00717.36
8.1.200.0140.00317.13
8.1.190.0170.00717.00
8.1.180.0210.00917.10
8.1.170.0320.00716.98
8.1.160.0210.02117.25
8.1.150.0280.02017.25
8.1.140.0320.00517.13
8.1.130.0270.01117.12
8.1.120.0360.00417.36
8.1.110.0270.01117.38
8.1.100.0310.00917.22
8.1.90.0330.00717.11
8.1.80.0190.02217.00
8.1.70.0360.00317.38
8.1.60.0370.00717.13
8.1.50.0400.00617.34
8.1.40.0350.01717.25
8.1.30.0420.00417.10
8.1.20.0270.01017.36
8.1.10.0220.00417.35
8.1.00.0190.00017.22

preferences:
33.04 ms | 403 KiB | 5 Q