3v4l.org

run code in 300+ PHP versions simultaneously
<?php $params = [1,2,3]; function transform(array &$params) { $references = []; foreach ($params as &$value) { $references[] = &$value; } $value = "foo"; return $references; } var_dump($params); $p = transform($params); var_dump($p); debug_zval_dump($p); debug_zval_dump($params);

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)
8.3.70.0180.00016.63
8.3.60.0090.00616.88
8.3.50.0080.01022.05
8.3.40.0120.00318.58
8.3.30.0070.00718.58
8.3.20.0040.00420.39
8.3.10.0040.00423.48
8.3.00.0040.00419.02
8.2.180.0140.00718.42
8.2.170.0140.00322.96
8.2.160.0070.00722.11
8.2.150.0050.00324.18
8.2.140.0000.00824.66
8.2.130.0030.00617.63
8.2.120.0050.00326.35
8.2.110.0060.00622.25
8.2.100.0060.00617.93
8.2.90.0000.00919.17
8.2.80.0050.00317.97
8.2.70.0090.00017.75
8.2.60.0050.00317.93
8.2.50.0050.00318.07
8.2.40.0000.00819.51
8.2.30.0000.00720.52
8.2.20.0090.00017.87
8.2.10.0000.00718.20
8.2.00.0000.00818.18
8.1.280.0110.00725.92
8.1.270.0030.00622.22
8.1.260.0040.00428.09
8.1.250.0040.00428.09
8.1.240.0070.01122.61
8.1.230.0040.00717.66
8.1.220.0040.00417.74
8.1.210.0030.00518.77
8.1.200.0040.00417.38
8.1.190.0080.00017.36
8.1.180.0030.00618.10
8.1.170.0040.00418.59
8.1.160.0060.00322.07
8.1.150.0040.00418.97
8.1.140.0040.00419.63
8.1.130.0030.00317.71
8.1.120.0040.00417.39
8.1.110.0040.00417.45
8.1.100.0020.00517.47
8.1.90.0000.00717.51
8.1.80.0050.00317.36
8.1.70.0030.00317.38
8.1.60.0080.00017.59
8.1.50.0050.00317.55
8.1.40.0000.00917.54
8.1.30.0000.00817.71
8.1.20.0000.00817.56
8.1.10.0050.00217.60
8.1.00.0030.00517.59
8.0.300.0000.00718.77
8.0.290.0030.00616.75
8.0.280.0030.00318.36
8.0.270.0030.00517.14
8.0.260.0000.00717.21
8.0.250.0000.00717.06
8.0.240.0040.00417.00
8.0.230.0000.00716.98
8.0.220.0000.00716.93
8.0.210.0070.00016.97
8.0.200.0050.00216.99
8.0.190.0000.00716.96
8.0.180.0000.00717.05
8.0.170.0000.00816.98
8.0.160.0040.00416.93
8.0.150.0000.00816.83
8.0.140.0100.00016.94
8.0.130.0070.00013.35
8.0.120.0040.00416.87
8.0.110.0000.00716.89
8.0.100.0040.00416.85
8.0.90.0000.00717.04
8.0.80.0130.00316.95
8.0.70.0040.00416.96
8.0.60.0000.00716.99
8.0.50.0040.00416.88
8.0.30.0120.00517.15
8.0.20.0100.00917.40
8.0.10.0040.00417.16
8.0.00.0100.00816.83
7.4.330.0020.00216.88
7.4.320.0030.00316.56
7.4.300.0070.00016.52
7.4.290.0070.00016.53
7.4.280.0080.00016.55
7.4.270.0000.00816.63
7.4.260.0080.00016.64
7.4.250.0080.00016.56
7.4.240.0050.00216.50
7.4.230.0030.00316.59
7.4.220.0120.01116.45
7.4.210.0090.01116.58
7.4.200.0070.00016.36
7.4.160.0040.01416.73
7.4.150.0120.00617.40
7.4.140.0100.00917.86
7.4.130.0100.00716.56
7.4.120.0090.01116.56
7.4.110.0090.01216.55
7.4.100.0070.01416.57
7.4.90.0060.01216.43
7.4.80.0080.00819.39
7.4.70.0120.00616.59
7.4.60.0090.00916.49
7.4.50.0070.00716.43
7.4.40.0100.00716.54
7.4.30.0150.00416.53
7.4.00.0050.01014.78
7.3.330.0000.00513.34
7.3.320.0050.00013.33
7.3.310.0070.00016.26
7.3.300.0060.00016.37
7.3.290.0000.00716.36
7.3.280.0120.00816.33
7.3.270.0140.00317.40
7.3.260.0170.00016.53
7.3.250.0090.00816.39
7.3.240.0080.01116.53
7.3.230.0110.00516.54
7.3.210.0170.00216.38
7.3.200.0130.00916.68
7.3.190.0080.00816.66
7.3.180.0090.01216.18
7.3.170.0120.00916.47
7.3.160.0130.00316.32
7.3.120.0120.00414.77
7.3.110.0070.01014.88
7.3.100.0100.00714.76
7.3.90.0030.00614.67
7.3.80.0000.01214.75
7.3.70.0040.00415.00
7.3.60.0070.00714.80
7.3.50.0040.01115.08
7.3.40.0030.01114.60
7.3.30.0060.01014.67
7.3.20.0040.00716.49
7.3.10.0000.01116.59
7.3.00.0100.00316.70
7.2.330.0080.01116.81
7.2.320.0110.00816.65
7.2.310.0120.00916.81
7.2.300.0210.00316.53
7.2.290.0120.01216.79
7.2.250.0090.00914.92
7.2.240.0060.01314.89
7.2.230.0080.00514.96
7.2.220.0030.01414.83
7.2.210.0030.01214.91
7.2.200.0000.01014.82
7.2.190.0030.01315.11
7.2.180.0110.00314.93
7.2.170.0080.00315.20
7.2.130.0140.00016.68
7.2.120.0080.00817.06
7.2.110.0060.00716.84
7.2.100.0040.01116.95
7.2.90.0030.01016.79
7.2.80.0060.00916.98
7.2.70.0040.00717.12
7.2.60.0090.00616.89
7.2.50.0040.00817.12
7.2.40.0100.00317.03
7.2.30.0060.00616.96
7.2.20.0040.01116.89
7.2.10.0030.01316.72
7.2.00.0060.00818.15
7.1.330.0030.01316.03
7.1.320.0030.00615.84
7.1.310.0000.00915.59
7.1.300.0070.01015.91
7.1.290.0060.00615.46
7.1.280.0090.00616.00
7.1.270.0080.00815.79
7.1.260.0080.00015.76
7.1.250.0060.00315.61
7.1.200.0070.00715.96
7.1.100.0030.00918.26
7.1.70.0090.00617.09
7.1.60.0160.00919.48
7.1.50.0240.00334.89
7.1.00.0100.07022.43
7.0.200.0100.00714.96
7.0.60.0100.03319.96
7.0.50.0130.06017.73
7.0.40.0000.05320.29
7.0.30.0270.06720.25
7.0.20.0200.05320.16
7.0.10.0170.07720.24
7.0.00.0030.06720.06
5.6.280.0100.06720.89
5.6.210.0170.07720.75
5.6.200.0100.07018.14
5.6.190.0070.08320.57
5.6.180.0500.07320.55
5.6.170.0100.05020.47
5.6.160.0030.09320.50
5.6.150.0030.06318.17
5.6.140.0030.08318.28
5.6.130.0100.08018.21
5.6.120.0100.08021.02
5.6.110.0030.04320.98
5.6.100.0100.07720.89
5.6.90.0030.07721.11
5.6.80.0100.07020.43
5.5.350.4130.04320.33
5.5.340.0100.08017.92
5.5.330.0130.07720.40
5.5.320.0370.07720.51
5.5.310.0230.07720.30
5.5.300.0070.05017.98
5.5.290.0030.05717.98
5.5.280.0070.08720.65
5.5.270.0070.05020.79
5.5.260.0070.07020.96
5.5.250.0130.06720.78
5.5.240.0200.07720.16

preferences:
81.05 ms | 401 KiB | 5 Q