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run code in 300+ PHP versions simultaneously
<?php $a = 'foo'; $array = [&$a]; var_dump($array); //$newArray = array_map(function(&$item){ return $item; }, $array); foreach ($array as &$item) { $newArray[] = &$item; } var_dump($newArray);

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)
8.3.70.0120.00318.28
8.3.60.0100.01018.68
8.3.50.0100.00621.09
8.3.40.0110.00418.59
8.3.30.0070.00719.14
8.3.20.0050.00320.38
8.3.10.0040.00422.04
8.3.00.0080.00022.43
8.2.190.0060.01016.58
8.2.180.0090.00616.32
8.2.170.0180.00422.96
8.2.160.0070.00720.18
8.2.150.0000.00824.18
8.2.140.0080.00024.66
8.2.130.0080.00026.16
8.2.120.0040.00419.66
8.2.110.0060.00320.57
8.2.100.0040.00819.39
8.2.90.0000.00719.17
8.2.80.0050.00317.97
8.2.70.0060.00317.50
8.2.60.0040.00417.93
8.2.50.0040.00418.07
8.2.40.0050.00518.30
8.2.30.0070.00018.10
8.2.20.0000.00917.71
8.2.10.0020.00517.64
8.2.00.0050.00317.73
8.1.280.0070.01025.92
8.1.270.0040.00420.32
8.1.260.0040.00426.35
8.1.250.0080.00028.09
8.1.240.0080.00023.87
8.1.230.0070.00419.06
8.1.220.0030.00617.74
8.1.210.0000.00818.77
8.1.200.0060.00317.35
8.1.190.0050.00317.53
8.1.180.0030.00518.59
8.1.170.0050.00318.47
8.1.160.0000.00722.06
8.1.150.0060.00318.54
8.1.140.0040.00417.41
8.1.130.0000.00717.88
8.1.120.0050.00317.49
8.1.110.0040.00417.35
8.1.100.0000.00717.46
8.1.90.0040.00417.40
8.1.80.0000.00717.45
8.1.70.0030.00317.34
8.1.60.0040.00417.57
8.1.50.0040.00417.48
8.1.40.0060.00317.47
8.1.30.0040.00417.60
8.1.20.0050.00317.66
8.1.10.0000.00817.51
8.1.00.0030.00617.45
8.0.300.0000.00718.77
8.0.290.0070.00017.18
8.0.280.0030.00318.34
8.0.270.0070.00017.25
8.0.260.0030.00716.88
8.0.250.0000.00716.95
8.0.240.0040.00416.93
8.0.230.0070.00016.92
8.0.220.0040.00416.87
8.0.210.0030.00316.84
8.0.200.0030.00316.87
8.0.190.0000.00716.96
8.0.180.0030.00716.98
8.0.170.0040.00416.84
8.0.160.0000.00716.89
8.0.150.0030.00716.83
8.0.140.0040.00416.75
8.0.130.0030.00313.27
8.0.120.0000.00816.80
8.0.110.0000.00816.91
8.0.100.0020.00516.77
8.0.90.0000.00716.81
8.0.80.0160.00616.87
8.0.70.0000.00716.68
8.0.60.0040.00416.78
8.0.50.0040.00416.82
8.0.30.0090.01116.81
8.0.20.0090.00917.40
8.0.10.0000.00716.91
8.0.00.0160.00216.69
7.4.330.0000.00715.00
7.4.320.0000.00716.48
7.4.300.0000.00616.48
7.4.290.0000.00716.36
7.4.280.0000.00716.59
7.4.270.0000.00716.57
7.4.260.0090.00016.59
7.4.250.0000.00716.41
7.4.240.0030.00516.48
7.4.230.0030.00316.50
7.4.220.0050.01416.64
7.4.210.0050.00916.56
7.4.200.0030.00516.58
7.4.190.0050.00316.30
7.4.160.0120.00316.62
7.4.150.0030.01517.40
7.4.140.0120.01017.86
7.4.130.0080.00916.50
7.4.120.0090.01016.43
7.4.110.0130.00316.29
7.4.100.0100.01016.68
7.4.90.0110.00816.57
7.4.80.0080.01219.39
7.4.70.0130.00316.39
7.4.60.0070.01116.29
7.4.50.0040.00416.58
7.4.40.0130.00322.77
7.4.30.0000.01616.38
7.4.00.0100.00715.18
7.3.330.0030.00313.07
7.3.320.0000.00513.16
7.3.310.0000.00716.39
7.3.300.0070.00016.24
7.3.290.0070.00716.32
7.3.280.0090.01016.31
7.3.270.0100.00717.40
7.3.260.0120.00616.43
7.3.250.0070.01216.65
7.3.240.0140.00416.27
7.3.230.0090.00916.39
7.3.210.0090.00916.54
7.3.200.0130.00319.39
7.3.190.0180.00416.26
7.3.180.0060.00916.52
7.3.170.0090.00916.29
7.3.160.0000.01516.34
7.3.120.0060.00615.00
7.3.10.0030.00916.91
7.3.00.0040.01116.87
7.2.330.0110.00716.42
7.2.320.0060.01516.38
7.2.310.0170.00316.34
7.2.300.0080.00816.41
7.2.290.0100.00716.66
7.2.130.0000.01116.96
7.2.120.0070.00716.98
7.2.110.0160.00116.86
7.2.100.0120.00317.00
7.2.90.0060.01017.05
7.2.80.0060.00317.08
7.2.70.0080.00316.88
7.2.60.0060.00716.96
7.2.50.0060.00916.95
7.2.40.0060.00317.00
7.2.30.0100.00317.05
7.2.20.0090.00616.96
7.2.10.0070.00316.85
7.2.00.0040.00718.02
7.1.250.0030.00615.84
7.1.200.0000.01115.69
7.1.100.0100.01018.05
7.1.70.0040.00716.91
7.1.60.0000.01017.31
7.1.50.0100.01316.87
7.1.00.0030.03322.37
7.0.200.0090.00916.62
7.0.140.0070.06721.95
7.0.60.0070.08319.93
7.0.50.0000.04717.77
7.0.40.0100.05019.90
7.0.30.0230.04020.09
7.0.20.0300.06320.12
7.0.10.0200.08320.22
7.0.00.0170.08320.16
5.6.210.0030.04720.72
5.6.200.0100.08018.09
5.6.190.0070.04020.35
5.6.180.0270.05320.45
5.6.170.0370.05720.50
5.6.160.0000.05720.50
5.6.150.0070.05718.22
5.6.140.0030.09018.18
5.6.130.0000.09018.08
5.6.120.0100.08021.11
5.6.110.0170.08021.11
5.6.100.0200.06721.00
5.6.90.0030.05721.12
5.6.80.0100.08020.35
5.6.70.3630.04720.35
5.5.350.0070.08320.48
5.5.340.0100.08017.93
5.5.330.0030.04320.19
5.5.320.0370.08020.27
5.5.310.0270.05320.16
5.5.300.0070.07717.87
5.5.290.0070.07717.91
5.5.280.0100.08020.68
5.5.270.0030.04020.79
5.5.260.0030.04020.89
5.5.250.0030.08020.69
5.5.240.0130.06320.18
5.4.450.0030.06319.33
5.4.440.0700.05719.49
5.4.430.0470.06719.10
5.4.420.0770.05719.56
5.4.410.1000.05019.51
5.4.400.0270.06318.68
5.4.390.0530.06318.78
5.4.380.0230.06318.59
5.4.370.0170.05018.75
5.4.360.0270.04018.66
5.4.350.0090.03711.97
5.4.340.0070.03611.97
5.4.320.0040.04212.46
5.4.310.0070.04412.45
5.4.300.0050.04012.46
5.4.290.0050.04312.45
5.4.280.0060.03612.35
5.4.270.0090.03712.35
5.4.260.0050.03712.35
5.4.250.0100.05318.83
5.4.240.0030.05318.86
5.4.230.0170.06318.96
5.4.220.0100.05318.83
5.4.210.0000.05718.86
5.4.200.0100.04718.82
5.4.190.0070.05718.58
5.4.180.0030.05318.83
5.4.170.0100.05018.88
5.4.160.0100.05018.76
5.4.150.0070.05718.77
5.4.140.0170.04016.27
5.4.130.0070.05016.36
5.4.120.0030.05016.25
5.4.110.0030.05316.21
5.4.100.0100.04316.29
5.4.90.0000.05316.44
5.4.80.0070.05716.21
5.4.70.0000.05316.32
5.4.60.0100.05016.31
5.4.50.0170.05016.41
5.4.40.0030.05016.32
5.4.30.0170.05716.34
5.4.20.0130.04016.25
5.4.10.0070.05016.41
5.4.00.0230.06015.70
5.3.290.0100.04212.80
5.3.280.0130.05014.46
5.3.270.0100.04714.60
5.3.260.0030.05314.63
5.3.250.0070.05014.63
5.3.240.0170.04014.52
5.3.230.0030.05314.47
5.3.220.0030.07314.66
5.3.210.0030.05714.58
5.3.200.0000.07014.41
5.3.190.0030.05014.56
5.3.180.0030.05314.41
5.3.170.0030.05314.45
5.3.160.0030.06714.29
5.3.150.0100.04714.47
5.3.140.0030.05314.46
5.3.130.0130.04714.64
5.3.120.0000.06014.55
5.3.110.0100.06014.44
5.3.100.0130.04313.81
5.3.90.0070.05313.87
5.3.80.0100.06014.04
5.3.70.0030.05013.89
5.3.60.0100.04714.02
5.3.50.0170.06013.90
5.3.40.0000.05713.80
5.3.30.0100.04313.95
5.3.20.0030.05013.60
5.3.10.0000.05013.42
5.3.00.0000.05313.53
5.2.170.0070.05311.03
5.2.160.0070.05310.90
5.2.150.0030.04311.04
5.2.140.0070.04011.24
5.2.130.0100.03311.11
5.2.120.0030.04011.25
5.2.110.0030.04011.20
5.2.100.0100.03011.13
5.2.90.0030.04011.01
5.2.80.0070.04011.10
5.2.70.0030.04011.09
5.2.60.0070.04011.16
5.2.50.0000.05010.93
5.2.40.0030.04010.89
5.2.30.0000.04310.89
5.2.20.0100.04711.11
5.2.10.0070.03710.86
5.2.00.0100.03310.79
5.1.60.0070.03310.23
5.1.50.0130.02310.14
5.1.40.0030.0379.89
5.1.30.0070.03710.41
5.1.20.0070.03010.34
5.1.10.0000.0409.84
5.1.00.0070.03310.30
5.0.50.0030.0338.48
5.0.40.0030.0278.46
5.0.30.0000.0438.31
5.0.20.0070.0238.28
5.0.10.0000.0308.11
5.0.00.0070.0407.98
4.4.90.0000.0236.27
4.4.80.0000.0236.27
4.4.70.0030.0236.27
4.4.60.0030.0276.27
4.4.50.0030.0206.27
4.4.40.0000.0376.26
4.4.30.0000.0236.26
4.4.20.0030.0206.26
4.4.10.0030.0206.26
4.4.00.0000.0376.26
4.3.110.0000.0276.26
4.3.100.0000.0236.26
4.3.90.0000.0236.26
4.3.80.0030.0406.26
4.3.70.0000.0206.26
4.3.60.0000.0236.26
4.3.50.0000.0236.26
4.3.40.0000.0476.26
4.3.30.0000.0206.26
4.3.20.0030.0206.26
4.3.10.0000.0236.26
4.3.00.0270.0306.93

preferences:
40.79 ms | 401 KiB | 5 Q