3v4l.org

run code in 300+ PHP versions simultaneously
<?php $set1 = ['A', 'B', 'C']; $set2 = [1, 2, 3]; function perms( $set1, $set2, $i) { $perms = array(); if( $i == size( $set1) - 1) { return array(); } foreach( $set1 as $1) { foreach( $set2 as $2) { $perms[] = $1 . $2; } } $i++; for( $j = 0; $j < $i; $j++) { $set1[] = array_shift( $set1); $set2[] = array_shift( $set2); } return array_merge( $perms, perms( $set1, $set2)); } var_dump( perms( $set1, $set2, 0));

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)
5.4.220.3970.04719.09
5.4.210.3830.03719.13
5.4.200.4430.03719.12
5.4.190.4400.03319.09
5.4.180.4130.03318.92
5.4.170.4470.04018.98
5.4.160.4630.04019.21
5.4.150.4600.04019.11
5.4.140.4470.03716.38
5.4.130.3930.03316.25
5.4.120.3730.03016.31
5.4.110.4000.04016.56
5.4.100.3700.02716.44
5.4.90.2730.03316.48
5.4.80.4700.03316.42
5.4.70.3970.03316.46
5.4.60.4300.03716.43
5.4.50.3970.03716.54
5.4.40.3730.04016.33
5.4.30.3870.03016.23
5.4.20.3870.03316.32
5.4.10.3600.03316.27
5.4.00.3870.03315.83
5.3.270.4230.03314.58
5.3.260.4230.06014.54
5.3.250.4570.03014.69
5.3.240.3770.03314.55
5.3.230.4100.03314.52
5.3.220.3870.03314.52
5.3.210.3830.03714.58
5.3.200.4700.04014.61
5.3.190.4100.03314.51
5.3.180.4600.03714.38
5.3.170.3870.03714.46
5.3.160.4570.04714.51
5.3.150.4200.03314.60
5.3.140.3500.03714.50
5.3.130.3800.04014.45
5.3.120.3670.03314.50
5.3.110.3570.04014.45
5.3.100.3870.04013.96
5.3.90.4470.04314.04
5.3.80.4470.03714.03
5.3.70.4470.03314.10
5.3.60.4070.03313.92
5.3.50.4600.04013.92
5.3.40.4300.04013.73
5.3.30.3870.03313.88
5.3.20.3970.03713.51
5.3.10.3570.03713.49
5.3.00.3930.03013.44

preferences:
140.02 ms | 1394 KiB | 7 Q