3v4l.org

run code in 300+ PHP versions simultaneously
<?php function func(&$arraykey) { return $arraykey; // function returns by value! } $array = array('a', 'b', 'c'); foreach (array_keys($array) as $key) { $y = &func($array[$key]); $z[] =& $y; } var_dump($z);

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)
8.3.60.0150.00418.68
8.3.50.0100.01021.97
8.3.40.0150.00018.84
8.3.30.0150.00019.09
8.3.20.0000.00820.16
8.3.10.0050.00323.53
8.3.00.0040.00419.08
8.2.180.0120.00616.50
8.2.170.0100.00322.96
8.2.160.0120.00320.45
8.2.150.0090.00024.18
8.2.140.0070.00024.66
8.2.130.0040.00426.16
8.2.120.0080.00020.92
8.2.110.0030.00622.07
8.2.100.0000.01120.40
8.2.90.0000.00819.26
8.2.80.0000.00817.97
8.2.70.0050.00317.63
8.2.60.0060.00317.93
8.2.50.0060.00318.07
8.2.40.0050.00319.91
8.2.30.0050.00218.19
8.2.20.0040.00417.82
8.2.10.0030.00518.00
8.2.00.0070.00017.81
8.1.280.0070.01025.92
8.1.270.0040.00424.02
8.1.260.0050.00326.35
8.1.250.0140.00028.09
8.1.240.0050.00522.20
8.1.230.0070.00319.12
8.1.220.0000.00817.74
8.1.210.0080.00018.77
8.1.200.0060.00617.23
8.1.190.0040.00417.23
8.1.180.0040.00718.10
8.1.170.0100.00018.60
8.1.160.0090.00021.97
8.1.150.0040.00418.60
8.1.140.0040.00417.39
8.1.130.0000.00717.70
8.1.120.0030.00317.53
8.1.110.0050.00217.48
8.1.100.0050.00217.38
8.1.90.0030.00617.42
8.1.80.0040.00417.48
8.1.70.0030.00317.36
8.1.60.0000.00817.54
8.1.50.0040.00417.60
8.1.40.0000.00717.57
8.1.30.0030.00617.57
8.1.20.0000.00817.61
8.1.10.0040.00417.41
8.1.00.0020.00517.46
8.0.300.0070.00018.77
8.0.290.0070.00216.91
8.0.280.0030.00318.49
8.0.270.0000.00717.22
8.0.260.0040.00417.18
8.0.250.0030.00317.02
8.0.240.0000.00716.95
8.0.230.0040.00416.99
8.0.220.0000.00716.82
8.0.210.0040.00416.89
8.0.200.0060.00016.97
8.0.190.0000.00716.89
8.0.180.0000.00717.02
8.0.170.0000.00817.02
8.0.160.0050.00217.01
8.0.150.0070.00016.89
8.0.140.0040.00416.82
8.0.130.0000.00513.38
8.0.120.0000.00816.90
8.0.110.0000.00816.93
8.0.100.0000.00717.02
8.0.90.0050.00216.82
8.0.80.0070.01117.00
8.0.70.0020.00516.93
8.0.60.0000.00716.95
8.0.50.0000.00716.89
8.0.30.0130.00817.21
8.0.20.0110.01217.40
8.0.10.0040.00416.94
8.0.00.0090.00816.70
7.4.330.0000.00415.00
7.4.320.0030.00316.64
7.4.300.0000.00616.55
7.4.290.0030.00316.51
7.4.280.0070.00016.50
7.4.270.0040.00416.52
7.4.260.0030.00716.41
7.4.250.0020.00516.55
7.4.240.0030.00316.50
7.4.230.0000.00816.68
7.4.220.0070.01116.67
7.4.210.0090.00816.64
7.4.200.0070.00016.61
7.4.190.0000.00716.62
7.4.160.0180.00316.48
7.4.150.0140.00317.40
7.4.140.0110.01017.86
7.4.130.0100.00616.63
7.4.120.0140.00316.50
7.4.110.0150.00816.57
7.4.100.0120.00916.61
7.4.90.0130.00616.48
7.4.80.0090.00919.39
7.4.70.0170.00316.44
7.4.60.0130.01016.58
7.4.50.0040.00416.61
7.4.40.0100.00716.61
7.4.30.0070.01016.68
7.4.00.0060.00615.21
7.3.330.0040.00413.36
7.3.320.0030.00313.38
7.3.310.0000.00716.35
7.3.300.0030.00316.32
7.3.290.0110.00316.26
7.3.280.0080.01016.34
7.3.270.0120.00917.40
7.3.260.0060.01016.36
7.3.250.0100.01016.37
7.3.240.0060.01316.36
7.3.230.0110.00616.45
7.3.210.0120.00616.65
7.3.200.0090.01219.39
7.3.190.0170.00016.38
7.3.180.0060.01016.34
7.3.170.0030.01316.44
7.3.160.0060.01216.39
7.3.120.0070.00714.86
7.2.330.0090.01216.78
7.2.320.0060.01616.58
7.2.310.0060.00916.50
7.2.300.0170.00016.73
7.2.290.0100.01316.69
7.2.60.0000.01616.80
7.2.00.0120.00319.52
7.1.200.0030.00915.61
7.1.100.0060.00918.16
7.1.70.0030.00617.25
7.1.60.0100.01319.70
7.1.50.0030.01916.88
7.1.00.0030.07722.35
7.0.200.0080.00416.83
7.0.140.0100.06721.95
7.0.60.0000.06320.02
7.0.50.0070.08017.88
7.0.40.0130.07017.73
7.0.30.0200.07017.86
7.0.20.0100.05717.76
7.0.10.0070.08317.71
7.0.00.0070.04017.84
5.6.280.0070.07021.09
5.6.210.0100.08320.61
5.6.200.0100.07318.15
5.6.190.0100.07318.16
5.6.180.0030.08318.16
5.6.170.0200.06718.19
5.6.160.0100.04718.19
5.6.150.0100.07018.29
5.6.140.0100.06018.28
5.6.130.0070.06718.14
5.6.120.0070.07718.27
5.6.110.0100.08018.17
5.6.100.0070.04018.27
5.6.90.0100.05318.27
5.6.80.0070.04317.52
5.6.70.0130.07017.57
5.6.60.0070.04717.51
5.6.50.0070.06317.61
5.6.40.0070.04317.60
5.6.30.0100.07717.52
5.6.20.0070.08017.48
5.6.10.0030.05017.51
5.6.00.0070.03717.63
5.5.350.4100.03320.39
5.5.340.0100.03718.07
5.5.330.0100.08318.07
5.5.320.0100.07718.09
5.5.310.0100.08018.09
5.5.300.0030.05017.98
5.5.290.0030.07018.02
5.5.280.0000.05018.07
5.5.270.0130.07718.04
5.5.260.0070.04717.98
5.5.250.0070.06317.90
5.5.240.0030.07717.36
5.5.230.0000.05317.46
5.5.220.0130.07317.41
5.5.210.0000.04317.46
5.5.200.0030.08317.36
5.5.190.0100.07317.39
5.5.180.0070.05317.39
5.5.160.0030.03717.44
5.5.150.0070.03717.30
5.5.140.0030.03717.37
5.5.130.0000.04017.34
5.5.120.0030.03717.42
5.5.110.0030.04017.36
5.5.100.0070.03317.34
5.5.90.0100.05017.33
5.5.80.0030.03717.33
5.5.70.0030.03717.22
5.5.60.0170.03017.32
5.5.50.0000.03717.21
5.5.40.0030.03717.19
5.5.30.0000.04717.22
5.5.20.0070.03317.20
5.5.10.0000.04017.21
5.5.00.0000.04017.28
5.4.450.0130.05319.48
5.4.440.0130.05319.36
5.4.430.0130.07719.41
5.4.420.0030.04319.59
5.4.410.0070.03719.21
5.4.400.0070.04318.89
5.4.390.0100.05719.27
5.4.380.0030.06019.08
5.4.370.0130.07718.98
5.4.360.0030.04719.22
5.4.350.0070.08019.12
5.4.340.0030.06719.14
5.4.320.0070.03719.14
5.4.310.0000.04318.89
5.4.300.0030.03719.14
5.4.290.0070.03319.03
5.4.280.0070.04019.03
5.4.270.0100.03019.02
5.4.260.0000.04019.01
5.4.250.0100.05319.03
5.4.240.0030.03719.04
5.4.230.0030.04319.03
5.4.220.0000.04019.03
5.4.210.0070.03318.94
5.4.200.0070.03319.00
5.4.190.0030.03719.26
5.4.180.0000.04019.30
5.4.170.0070.03319.12
5.4.160.0030.04319.03
5.4.150.0070.04018.95
5.4.140.0100.02716.38
5.4.130.0000.04016.32
5.4.120.0000.03716.30
5.4.110.0000.03716.41
5.4.100.0000.03716.37
5.4.90.0000.03716.47
5.4.80.0030.03316.36
5.4.70.0070.03016.54
5.4.60.0000.05016.21
5.4.50.0100.03316.50
5.4.40.0000.07016.45
5.4.30.0030.05016.30
5.4.20.0130.06016.38
5.4.10.0030.07316.35
5.4.00.0070.05315.76
5.3.290.0000.04014.70
5.3.280.0100.03014.56
5.3.270.0000.04014.60
5.3.260.0030.04314.57
5.3.250.0070.03314.63
5.3.240.0030.03714.61
5.3.230.0030.04314.64
5.3.220.0070.03714.59
5.3.210.0000.04014.42
5.3.200.0070.03314.67
5.3.190.0030.03714.63
5.3.180.0030.03314.53
5.3.170.0000.03714.41
5.3.160.0030.04014.64
5.3.150.0000.04014.59
5.3.140.0100.06014.58
5.3.130.0070.04314.52
5.3.120.0070.08014.61
5.3.110.0100.04714.59
5.3.100.0170.06714.11
5.3.90.0130.06714.06
5.3.80.0030.08014.03
5.3.70.0070.04314.05
5.3.60.0130.03714.00
5.3.50.0100.07013.84
5.3.40.0130.06314.00
5.3.30.0100.07013.81
5.3.20.0030.05013.91
5.3.10.0070.06313.67
5.3.00.0130.06313.62
5.2.170.0070.06311.18
5.2.160.0070.05311.24
5.2.150.0000.04711.14
5.2.140.0030.05311.13
5.2.130.0030.06711.18
5.2.120.0100.06011.09
5.2.110.0030.03311.10
5.2.100.0100.05311.00
5.2.90.0100.05010.98
5.2.80.0030.03711.05
5.2.70.0030.04011.05
5.2.60.0070.06011.08
5.2.50.0070.04711.09
5.2.40.0000.06310.96
5.2.30.0030.04310.98
5.2.20.0030.06310.85
5.2.10.0100.05310.86
5.2.00.0030.06010.63
5.1.60.0070.03310.04
5.1.50.0000.0339.98
5.1.40.0100.0479.96
5.1.30.0030.05710.34
5.1.20.0070.05310.36
5.1.10.0070.05010.05
5.1.00.0030.06010.01
5.0.50.0000.0278.46
5.0.40.0000.0438.35
5.0.30.0070.0608.27
5.0.20.0100.0408.03
5.0.10.0030.0238.00
5.0.00.0000.0678.23
4.4.90.0030.0177.66
4.4.80.0030.0337.66
4.4.70.0000.0377.66
4.4.60.0070.0337.66
4.4.50.0070.0337.66
4.4.40.0030.0507.66
4.4.30.0030.0237.66
4.4.20.0000.0377.66
4.4.10.0070.0337.66
4.4.00.0000.0477.66
4.3.110.0000.0277.66
4.3.100.0000.0377.66
4.3.90.0030.0177.66
4.3.80.0030.0507.66
4.3.70.0030.0337.66
4.3.60.0000.0337.66
4.3.50.0000.0377.66
4.3.40.0070.0477.66
4.3.30.0070.0307.66
4.3.20.0000.0307.66
4.3.10.0000.0277.66
4.3.00.0000.0377.66

preferences:
48.06 ms | 400 KiB | 5 Q