3v4l.org

run code in 300+ PHP versions simultaneously
<?php $dtArray = array(); $dtArray[] = new DateTime(); $dtArray[] = new DateTime(); foreach($dtArray as $value) { $value = null; } echo "object NOT reference: \n"; var_dump($dtArray); $dtArrayRef = array(); $dtArrayRef[] = new DateTime(); $dtArrayRef[] = new DateTime(); foreach($dtArrayRef as &$value) { $value = null; } echo "object REFERENCE: \n"; var_dump($dtArrayRef); $string = array(); $string[] = 'new DateTime();'; $string[] = 'new DateTime();'; foreach($string as $value) { $value = null; } echo "string NOT reference: \n"; var_dump($string);

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)
8.3.60.0150.00616.88
8.3.50.0030.01218.30
8.3.40.0150.00318.95
8.3.30.0120.00318.80
8.3.20.0110.00420.34
8.3.10.0080.00023.66
8.3.00.0030.00519.38
8.2.180.0130.00718.28
8.2.170.0070.00722.96
8.2.160.0100.00322.26
8.2.150.0040.00424.18
8.2.140.0050.00324.66
8.2.130.0000.01017.75
8.2.120.0000.00826.35
8.2.110.0030.00620.77
8.2.100.0040.00817.84
8.2.90.0040.00418.34
8.2.80.0000.00818.34
8.2.70.0050.00318.03
8.2.60.0030.01017.93
8.2.50.0040.00418.10
8.2.40.0040.00420.59
8.2.30.0000.00720.70
8.2.20.0060.00317.94
8.2.10.0040.00418.14
8.2.00.0040.00418.31
8.1.280.0120.00325.92
8.1.270.0080.00023.99
8.1.260.0040.00428.09
8.1.250.0000.00828.09
8.1.240.0040.00423.84
8.1.230.0040.00720.84
8.1.220.0000.00817.74
8.1.210.0050.00318.90
8.1.200.0030.00517.25
8.1.190.0090.00017.47
8.1.180.0030.00618.10
8.1.170.0000.00818.62
8.1.160.0000.00722.13
8.1.150.0050.00218.94
8.1.140.0040.00419.68
8.1.130.0030.00317.82
8.1.120.0070.00017.66
8.1.110.0000.00817.62
8.1.100.0040.00417.51
8.1.90.0050.00217.61
8.1.80.0040.00417.58
8.1.70.0030.00317.54
8.1.60.0030.00617.76
8.1.50.0030.00517.65
8.1.40.0000.00817.59
8.1.30.0000.00817.79
8.1.20.0040.00417.66
8.1.10.0060.00317.60
8.1.00.0000.00917.73
8.0.300.0040.00420.04
8.0.290.0050.00217.00
8.0.280.0030.00318.52
8.0.270.0080.00017.20
8.0.260.0070.00017.24
8.0.250.0040.00417.14
8.0.240.0030.00317.12
8.0.230.0050.00317.04
8.0.220.0040.00417.14
8.0.210.0050.00217.06
8.0.200.0070.00017.08
8.0.190.0070.00017.16
8.0.180.0040.00417.12
8.0.170.0040.00417.13
8.0.160.0070.00017.05
8.0.150.0000.00817.11
8.0.140.0000.01017.02
8.0.130.0060.00013.44
8.0.120.0040.00417.06
8.0.110.0030.00516.98
8.0.100.0000.00717.04
8.0.90.0000.00717.07
8.0.80.0090.00617.04
8.0.70.0000.01017.02
8.0.60.0080.00017.21
8.0.50.0000.00717.00
8.0.30.0110.01117.15
8.0.20.0120.00917.49
8.0.10.0040.00417.14
8.0.00.0130.00716.95
7.4.330.0000.00516.77
7.4.320.0030.00316.68
7.4.300.0040.00416.63
7.4.290.0020.00516.66
7.4.280.0050.00316.58
7.4.270.0030.00316.73
7.4.260.0000.00716.48
7.4.250.0000.00916.62
7.4.240.0010.00616.75
7.4.230.0000.00716.84
7.4.220.0180.00616.53
7.4.210.0070.00716.76
7.4.200.0040.00416.63
7.4.160.0130.00716.60
7.4.150.0110.00717.40
7.4.140.0090.01017.86
7.4.130.0100.00916.57
7.4.120.0070.01116.72
7.4.110.0060.01216.75
7.4.100.0130.01016.65
7.4.90.0070.01016.63
7.4.80.0130.00719.39
7.4.70.0100.00716.62
7.4.60.0130.00316.76
7.4.50.0160.00016.76
7.4.40.0130.01216.47
7.4.30.0110.00916.86
7.4.00.0080.00915.18
7.3.330.0000.00613.13
7.3.320.0000.00713.18
7.3.310.0000.00716.50
7.3.300.0000.00716.38
7.3.290.0000.00716.41
7.3.280.0060.01016.37
7.3.270.0090.00917.40
7.3.260.0080.01216.65
7.3.250.0110.00916.52
7.3.240.0040.01316.43
7.3.230.0120.00616.66
7.3.210.0150.00316.73
7.3.200.0090.00916.69
7.3.190.0050.01316.77
7.3.180.0070.01416.54
7.3.170.0120.00616.62
7.3.160.0150.00416.55
7.3.120.0090.00915.16
7.3.110.0080.00815.11
7.3.100.0030.01314.92
7.3.90.0060.00915.18
7.3.80.0030.01314.77
7.3.70.0100.00315.04
7.3.60.0030.01114.88
7.3.50.0050.00515.02
7.3.40.0030.01214.68
7.3.30.0030.01014.77
7.3.20.0000.01016.63
7.3.10.0030.01016.63
7.3.00.0090.00916.79
7.2.330.0220.00316.70
7.2.320.0080.01716.90
7.2.310.0110.01116.78
7.2.300.0090.00916.94
7.2.290.0120.00916.91
7.2.250.0130.00615.16
7.2.240.0060.01315.14
7.2.230.0030.00915.03
7.2.220.0130.00315.02
7.2.210.0050.00515.02
7.2.200.0000.00915.06
7.2.190.0130.00315.29
7.2.180.0040.01114.89
7.2.170.0040.01115.29
7.2.60.0070.00717.05
7.2.00.0030.00919.29
7.1.330.0070.01015.92
7.1.320.0000.01215.80
7.1.310.0110.00416.13
7.1.300.0030.01316.09
7.1.290.0070.00715.94
7.1.280.0030.01015.75
7.1.270.0100.00415.93
7.1.260.0090.00315.99
7.1.200.0030.01016.00
7.1.100.0040.01218.10
7.1.70.0000.00717.36
7.1.60.0130.01019.48
7.1.50.0040.00716.87
7.1.00.0100.06722.36
7.0.200.0430.00315.05
7.0.60.0030.08319.94
7.0.50.0100.07717.82
7.0.40.0200.07320.09
7.0.30.0230.08020.21
7.0.20.0230.08019.96
7.0.10.0000.09720.12
7.0.00.0070.09320.33
5.6.280.0030.03021.09
5.6.210.0030.05720.47
5.6.200.0070.08018.11
5.6.190.0000.04720.43
5.6.180.0430.03720.57
5.6.170.0330.07020.49
5.6.160.0030.04320.31
5.6.150.0070.08318.15
5.6.140.0030.06018.18
5.6.130.0100.07318.21
5.6.120.0130.07720.98
5.6.110.0030.08720.97
5.6.100.0100.03721.04
5.6.90.0170.07320.97
5.6.80.0130.03020.40
5.5.350.3170.03320.33
5.5.340.0070.04317.91
5.5.330.0030.04020.40
5.5.320.0530.05020.31
5.5.310.0270.08320.31
5.5.300.0130.07017.98
5.5.290.0070.06718.02
5.5.280.0070.08320.80
5.5.270.0130.08020.76
5.5.260.0030.05320.79
5.5.250.0070.08720.61
5.5.240.0200.07720.15

preferences:
50.84 ms | 401 KiB | 5 Q