3v4l.org

run code in 300+ PHP versions simultaneously
<?php function refArray($arr) { var_dump($arr); $refs = array(); foreach ($arr as $key => $value) $refs[$key] = &$arr[$key]; var_dump($refs); return $refs; } $arr = [3, "hello", 0.8, null]; $referenceArray = refArray($arr); echo "----------------------\r\n"; var_dump($arr); var_dump($referenceArray);

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)
8.3.60.0180.00316.74
8.3.50.0150.00521.98
8.3.40.0150.00018.67
8.3.30.0090.00619.21
8.3.20.0000.00720.20
8.3.10.0000.00721.97
8.3.00.0050.00319.14
8.2.180.0120.01216.38
8.2.170.0110.00422.96
8.2.160.0100.00722.08
8.2.150.0080.00024.18
8.2.140.0050.00324.66
8.2.130.0090.00026.16
8.2.120.0080.00019.43
8.2.110.0100.00020.93
8.2.100.0120.00017.84
8.2.90.0060.00317.84
8.2.80.0000.00817.97
8.2.70.0000.00817.75
8.2.60.0040.00418.04
8.2.50.0030.00618.07
8.2.40.0090.00018.12
8.2.30.0000.00719.45
8.2.20.0000.00817.79
8.2.10.0040.00418.13
8.2.00.0000.00817.74
8.1.280.0180.00425.92
8.1.270.0040.00418.95
8.1.260.0080.00026.35
8.1.250.0060.00328.09
8.1.240.0060.00322.29
8.1.230.0060.00620.89
8.1.220.0000.00817.74
8.1.210.0070.00518.77
8.1.200.0060.00617.23
8.1.190.0040.00417.25
8.1.180.0080.00018.10
8.1.170.0040.00418.46
8.1.160.0000.00722.02
8.1.150.0040.00418.76
8.1.140.0060.00319.14
8.1.130.0000.00717.84
8.1.120.0050.00217.44
8.1.110.0040.00417.42
8.1.100.0080.00017.45
8.1.90.0040.00417.45
8.1.80.0040.00417.47
8.1.70.0000.00717.38
8.1.60.0080.00017.50
8.1.50.0030.00617.54
8.1.40.0050.00317.39
8.1.30.0050.00317.59
8.1.20.0000.00717.64
8.1.10.0040.00417.47
8.1.00.0030.00617.46
8.0.300.0040.00419.86
8.0.290.0040.00416.75
8.0.280.0000.00718.37
8.0.270.0040.00417.38
8.0.260.0030.00317.20
8.0.250.0000.00716.93
8.0.240.0070.00016.87
8.0.230.0070.00016.98
8.0.220.0000.00716.89
8.0.210.0030.00416.89
8.0.200.0060.00016.86
8.0.190.0050.00316.96
8.0.180.0000.00716.96
8.0.170.0000.00816.88
8.0.160.0000.00816.80
8.0.150.0050.00316.70
8.0.140.0030.00316.75
8.0.130.0040.00413.37
8.0.120.0040.00416.85
8.0.110.0070.00016.84
8.0.100.0000.00816.72
8.0.90.0000.00716.85
8.0.80.0090.01216.91
8.0.70.0070.00016.86
8.0.60.0000.00716.76
8.0.50.0000.00716.86
8.0.30.0110.01117.26
8.0.20.0040.01517.40
8.0.10.0080.00016.83
8.0.00.0130.01116.79
7.4.330.0040.00415.03
7.4.320.0030.00316.61
7.4.300.0070.00016.53
7.4.290.0040.00416.53
7.4.280.0070.00016.64
7.4.270.0030.00316.50
7.4.260.0000.00716.47
7.4.250.0080.00016.62
7.4.240.0050.00216.62
7.4.230.0040.00416.41
7.4.220.0130.00716.46
7.4.210.0090.01216.55
7.4.200.0030.00316.61
7.4.160.0030.01216.44
7.4.150.0040.01517.40
7.4.140.0070.01117.86
7.4.130.0040.01316.43
7.4.120.0060.01116.52
7.4.110.0170.00016.52
7.4.100.0150.01216.53
7.4.90.0090.00916.61
7.4.80.0110.00819.39
7.4.70.0060.01316.64
7.4.60.0140.00316.48
7.4.50.0040.00016.44
7.4.40.0060.01116.55
7.4.30.0110.00716.63
7.4.00.0080.00715.03
7.3.330.0060.00013.37
7.3.320.0030.00313.32
7.3.310.0050.00316.39
7.3.300.0070.00016.36
7.3.290.0070.00016.41
7.3.280.0060.01016.31
7.3.270.0150.00317.40
7.3.260.0120.00616.64
7.3.250.0110.00916.40
7.3.240.0060.01116.37
7.3.230.0130.01216.48
7.3.210.0110.00716.27
7.3.200.0120.00919.39
7.3.190.0040.01216.59
7.3.180.0060.01016.29
7.3.170.0070.01416.36
7.3.160.0200.00016.48
7.3.120.0100.00714.75
7.3.110.0040.01414.86
7.3.100.0060.00614.70
7.3.90.0030.00615.12
7.3.80.0100.00314.72
7.3.70.0060.00914.63
7.3.60.0120.00014.64
7.3.50.0030.01114.90
7.3.40.0030.01214.77
7.3.30.0030.01314.98
7.3.20.0030.01016.64
7.3.10.0000.01116.76
7.3.00.0070.01016.68
7.2.330.0120.00616.68
7.2.320.0140.00616.77
7.2.310.0160.00716.64
7.2.300.0000.01616.88
7.2.290.0100.01016.58
7.2.250.0030.01614.93
7.2.240.0070.01414.95
7.2.230.0090.00615.13
7.2.220.0030.01015.03
7.2.210.0000.01415.25
7.2.200.0090.00915.07
7.2.190.0000.01215.06
7.2.180.0070.00715.16
7.2.170.0100.00615.11
7.1.330.0070.00715.97
7.1.320.0040.01415.99
7.1.310.0000.01315.67
7.1.300.0090.00015.93
7.1.290.0100.00315.81
7.1.280.0000.01415.54
7.1.270.0000.01415.44
7.1.260.0060.00615.79
7.1.100.0110.00018.11
7.1.70.0080.00317.19
7.1.60.0070.01719.46
7.1.50.0140.00734.45
7.1.00.0030.07722.28
7.0.200.0740.00714.64
7.0.140.0030.04722.13
7.0.60.0030.04319.93
7.0.50.0070.07017.87
7.0.40.0070.04320.03
7.0.30.0400.07320.12
7.0.20.0300.08320.15
7.0.10.0070.08020.15
7.0.00.0130.08020.12
5.6.280.0070.06321.10
5.6.210.0070.07020.71
5.6.200.0030.09318.29
5.6.190.0130.07720.34
5.6.180.0170.05020.50
5.6.170.0200.05320.55
5.6.160.0000.05320.46
5.6.150.0070.08018.27
5.6.140.0070.08318.19
5.6.130.0000.09018.28
5.6.120.0070.05021.02
5.6.110.0100.05321.05
5.6.100.0070.08320.89
5.6.90.0130.08720.95
5.6.80.0030.08720.38
5.5.350.0270.07320.43
5.5.340.0000.05018.09
5.5.330.0030.04020.56
5.5.320.0030.08720.32
5.5.310.0330.05720.34
5.5.300.0070.08018.06
5.5.290.0000.04318.08
5.5.280.0100.08020.80
5.5.270.0100.07320.75
5.5.260.0070.09020.96
5.5.250.0070.05720.66
5.5.240.0330.06320.17
5.4.450.2130.04019.28
5.4.440.2570.04719.52
5.4.430.2400.04319.40
5.4.420.2470.04019.19
5.4.410.0070.04019.23
5.4.400.0000.04319.09
5.4.390.0370.03019.09
5.4.380.0270.06018.84
5.4.370.0230.05319.17
5.4.360.0230.04019.23
5.4.350.0200.04719.20
5.4.340.0270.05719.18
5.4.320.0130.05019.08
5.4.310.0170.04719.25
5.4.300.0200.03718.97
5.4.290.0170.07319.24
5.4.280.0070.06718.99
5.4.270.0130.05019.06
5.4.260.0230.06018.94
5.4.250.0230.04019.15
5.4.240.0200.05719.24
5.4.230.0230.03719.19
5.4.220.0170.04018.98
5.4.210.0070.07319.19
5.4.200.0270.03019.18
5.4.190.0130.04018.99
5.4.180.0230.05318.82
5.4.170.0030.04018.86
5.4.160.0130.05718.98
5.4.150.0600.07018.86
5.4.140.2670.04016.36
5.4.130.0070.06016.54
5.4.120.0370.02716.34
5.4.110.0070.05016.61
5.4.100.0000.03716.61
5.4.90.0670.05716.63
5.4.80.2670.03716.57
5.4.70.2600.03316.62
5.4.60.0070.06716.54
5.4.50.0070.04316.43
5.4.40.0070.07016.37
5.4.30.0000.03716.51
5.4.20.0030.03316.32
5.4.10.0930.07016.51
5.4.00.0300.06715.88
5.3.290.0270.03014.75
5.3.280.0170.05014.65
5.3.270.0200.06714.61
5.3.260.0100.03314.75
5.3.250.0130.04014.58
5.3.240.0300.06714.58
5.3.230.0200.03314.74
5.3.220.0270.04314.65
5.3.210.0070.07714.64
5.3.200.0130.04314.46
5.3.190.0000.08014.54
5.3.180.0000.04314.58
5.3.170.2400.04014.64
5.3.160.0070.04014.57
5.3.150.0070.05714.57
5.3.140.1600.05314.67
5.3.130.0070.04014.63
5.3.120.0030.08014.52
5.3.110.1830.04714.45
5.3.100.0130.06314.01
5.3.90.0000.04014.17
5.3.80.2130.04014.13
5.3.70.0030.05713.93
5.3.60.0400.04314.09
5.3.50.1400.03313.92
5.3.40.2770.03313.92
5.3.30.0000.03713.96
5.3.20.0700.03013.59
5.3.10.1970.03313.59
5.3.00.2330.03713.54
5.2.170.0070.03011.20
5.2.160.0000.05011.22
5.2.150.0030.03711.04
5.2.140.0270.03711.21
5.2.130.0100.03311.25
5.2.120.0130.03311.19
5.2.110.0200.04311.10
5.2.100.0030.03311.11
5.2.90.0070.03011.32
5.2.80.0130.06311.00
5.2.70.0100.03311.06
5.2.60.0000.03310.96
5.2.50.0070.02311.06
5.2.40.0000.03011.00
5.2.30.0600.03311.05
5.2.20.0030.04311.08
5.2.10.0070.02711.01
5.2.00.0000.04310.68
5.1.60.0670.02010.21
5.1.50.1700.0239.98
5.1.40.0000.03710.03
5.1.30.0070.06710.34
5.1.20.0770.02710.40
5.1.10.0130.0279.98
5.1.00.0030.0239.95
5.0.50.0030.0208.53
5.0.40.0030.0208.30
5.0.30.0030.0408.12
5.0.20.0000.0208.13
5.0.10.0200.0238.07
5.0.00.0300.0578.31
4.4.90.0070.0278.07
4.4.80.0000.0278.07
4.4.70.0030.0138.07
4.4.60.0030.0138.07
4.4.50.0030.0138.07
4.4.40.0000.0478.07
4.4.30.0070.0278.07
4.4.20.0030.0208.07
4.4.10.0030.0208.07
4.4.00.0030.0278.07
4.3.110.0070.0238.07
4.3.100.0000.0208.07
4.3.90.0030.0178.07
4.3.80.0030.0338.07
4.3.70.0030.0138.07
4.3.60.0070.0178.07
4.3.50.0030.0238.07
4.3.40.0070.0238.07
4.3.30.0000.0178.07
4.3.20.0000.0338.07
4.3.10.0000.0208.07
4.3.00.0030.0178.07

preferences:
46.08 ms | 401 KiB | 5 Q