3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array('1'=>'a1','2'=>'a2'); $b = array('2'=>'b2'); var_dump($a+$b); var_dump($b+$a); var_dump(array_merge($a,$b)); var_dump(array_merge($b,$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)
8.3.70.0110.00318.31
8.3.60.0130.01318.18
8.3.50.0090.00617.94
8.3.40.0070.00718.79
8.3.30.0110.00418.60
8.3.20.0070.00020.04
8.3.10.0060.00318.75
8.3.00.0040.00421.91
8.2.190.0090.00616.58
8.2.180.0120.00316.32
8.2.170.0070.00722.96
8.2.160.0150.00020.38
8.2.150.0070.00024.18
8.2.140.0080.00024.66
8.2.130.0000.00920.56
8.2.120.0040.00426.35
8.2.110.0060.00320.53
8.2.100.0000.01118.03
8.2.90.0040.00418.03
8.2.80.0080.00017.97
8.2.70.0060.00317.54
8.2.60.0040.00417.91
8.2.50.0030.00618.10
8.2.40.0090.00022.15
8.2.30.0000.00719.24
8.2.20.0000.00817.99
8.2.10.0070.00017.97
8.2.00.0070.00018.11
8.1.280.0070.00725.92
8.1.270.0040.00423.84
8.1.260.0050.00326.35
8.1.250.0040.00428.09
8.1.240.0030.00920.41
8.1.230.0090.00321.02
8.1.220.0060.00317.74
8.1.210.0000.00818.77
8.1.200.0040.00417.36
8.1.190.0000.00917.11
8.1.180.0030.00618.10
8.1.170.0000.00818.39
8.1.160.0040.00418.79
8.1.150.0000.00720.21
8.1.140.0000.00719.13
8.1.130.0070.00018.73
8.1.120.0070.00017.37
8.1.110.0040.00417.25
8.1.100.0040.00417.36
8.1.90.0030.00617.39
8.1.80.0000.00717.42
8.1.70.0030.00317.38
8.1.60.0000.00817.39
8.1.50.0050.00217.50
8.1.40.0030.00517.43
8.1.30.0060.00317.62
8.1.20.0040.00417.59
8.1.10.0060.00317.41
8.1.00.0040.00417.30
8.0.300.0050.00319.82
8.0.290.0090.00316.74
8.0.280.0030.00318.43
8.0.270.0070.00017.18
8.0.260.0070.00018.86
8.0.250.0040.00416.94
8.0.240.0000.00716.88
8.0.230.0030.00316.84
8.0.220.0030.00316.91
8.0.210.0070.00016.92
8.0.200.0040.00416.94
8.0.190.0000.00816.85
8.0.180.0050.00216.83
8.0.170.0070.00416.78
8.0.160.0000.00716.80
8.0.150.0080.00316.79
8.0.140.0090.00016.82
8.0.130.0030.00313.25
8.0.120.0080.00016.84
8.0.110.0040.00416.86
8.0.100.0040.00416.90
8.0.90.0000.00716.80
8.0.80.0090.00916.89
8.0.70.0040.00416.78
8.0.60.0070.00016.73
8.0.50.0040.00416.91
8.0.30.0100.00817.02
8.0.20.0140.00517.40
8.0.10.0000.00716.82
8.0.00.0060.01616.63
7.4.330.0020.00215.55
7.4.320.0000.00616.46
7.4.300.0050.00216.52
7.4.290.0030.00316.51
7.4.280.0000.00916.56
7.4.270.0030.00316.57
7.4.260.0040.00416.49
7.4.250.0040.00416.31
7.4.240.0070.00016.54
7.4.230.0040.00416.44
7.4.220.0120.00616.53
7.4.210.0100.00816.46
7.4.200.0030.00316.27
7.4.160.0110.01016.42
7.4.150.0160.01017.40
7.4.140.0100.01317.86
7.4.130.0090.00916.41
7.4.120.0070.01616.44
7.4.110.0080.00816.59
7.4.100.0090.00916.31
7.4.90.0130.00916.28
7.4.80.0090.00919.39
7.4.70.0150.00316.29
7.4.60.0060.01516.22
7.4.50.0100.00616.30
7.4.40.0190.00416.21
7.4.30.0150.00616.34
7.4.00.0110.00714.81
7.3.330.0020.00213.03
7.3.320.0050.00013.12
7.3.310.0030.00316.27
7.3.300.0030.00616.11
7.3.290.0060.00016.21
7.3.280.0080.00816.19
7.3.270.0140.00317.40
7.3.260.0100.00716.46
7.3.250.0120.00616.21
7.3.240.0090.00816.45
7.3.230.0110.00716.24
7.3.210.0120.00616.32
7.3.200.0130.00316.05
7.3.190.0000.01816.16
7.3.180.0090.00916.21
7.3.170.0030.01316.26
7.3.160.0160.00616.43
7.3.120.0100.00714.66
7.3.110.0100.00315.00
7.3.100.0000.01514.44
7.3.90.0090.00614.73
7.3.80.0030.00915.14
7.3.70.0040.00414.40
7.3.60.0090.00614.55
7.3.50.0120.00314.80
7.3.40.0060.00714.84
7.3.30.0070.01014.60
7.3.20.0100.00316.51
7.3.10.0090.00616.58
7.3.00.0080.00316.38
7.2.330.0100.00916.47
7.2.320.0070.01016.50
7.2.310.0090.00616.63
7.2.300.0030.02016.38
7.2.290.0120.00616.37
7.2.250.0000.01914.86
7.2.240.0110.00614.54
7.2.230.0000.01715.06
7.2.220.0070.00414.71
7.2.210.0070.00714.83
7.2.200.0070.00314.80
7.2.190.0070.01014.91
7.2.180.0030.00914.99
7.2.170.0040.00814.76
7.2.60.0090.00616.47
7.2.00.0040.01419.35
7.1.330.0100.00615.85
7.1.320.0100.00715.55
7.1.310.0070.00715.43
7.1.300.0070.00715.74
7.1.290.0060.00615.68
7.1.280.0060.00315.55
7.1.270.0060.00615.54
7.1.260.0030.00715.77
7.1.200.0060.00915.39
7.1.120.0100.01018.70
7.1.110.0080.00618.18
7.1.100.0080.00418.09
7.1.90.0060.00618.39
7.1.80.0040.00818.19
7.1.70.0090.00317.22
7.1.60.0210.00635.04
7.1.50.0220.01234.88
7.1.40.0150.01134.49
7.1.30.0160.01034.39
7.1.20.0160.01934.50
7.1.10.0000.01616.40
7.1.00.0030.01016.52

preferences:
82.77 ms | 401 KiB | 5 Q