3v4l.org

run code in 300+ PHP versions simultaneously
<?php set_time_limit(1); $arr = ['a', 'b']; $child = &$arr; $i = 1; foreach ($child AS $key => $fruit) { $child[$i] = $fruit; unset($child[$key]); $i++; } var_dump($child);

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)
8.3.60.0170.00318.43
8.3.50.0090.00921.13
8.3.40.0110.00418.63
8.3.30.0130.00319.00
8.3.20.0070.00020.34
8.3.10.0030.00620.49
8.3.00.0050.00319.26
8.2.180.0120.00416.38
8.2.170.0070.00722.96
8.2.160.0140.00020.38
8.2.150.0080.00024.18
8.2.140.0050.00324.66
8.2.130.0040.00426.16
8.2.120.0050.00322.23
8.2.110.0040.00420.39
8.2.100.0040.00718.09
8.2.90.0000.00819.34
8.2.80.0090.00017.97
8.2.70.0050.00317.63
8.2.60.0040.00418.00
8.2.50.0090.00018.07
8.2.40.0040.00420.07
8.2.30.0000.01018.18
8.2.20.0000.00717.62
8.2.10.0000.00818.05
8.2.00.0080.00017.62
8.1.280.0170.00325.92
8.1.270.0030.00623.75
8.1.260.0000.00726.35
8.1.250.0040.00428.09
8.1.240.0040.01223.92
8.1.230.0110.00019.21
8.1.220.0000.00817.74
8.1.210.0000.00818.77
8.1.200.0090.00017.35
8.1.190.0040.00417.35
8.1.180.0080.00018.10
8.1.170.0030.00518.59
8.1.160.0000.00721.92
8.1.150.0040.00418.80
8.1.140.0050.00517.42
8.1.130.0000.00717.32
8.1.120.0000.00717.45
8.1.110.0040.00417.42
8.1.100.0000.00917.45
8.1.90.0000.00717.43
8.1.80.0030.00517.34
8.1.70.0040.00417.38
8.1.60.0040.00417.48
8.1.50.0030.00617.58
8.1.40.0030.00617.53
8.1.30.0040.00417.58
8.1.20.0000.00717.66
8.1.10.0000.00717.55
8.1.00.0040.00717.31
8.0.300.0040.00418.77
8.0.290.0070.00016.75
8.0.280.0000.00718.36
8.0.270.0080.00017.32
8.0.260.0080.00016.80
8.0.250.0000.00717.00
8.0.240.0040.00416.91
8.0.230.0040.00416.98
8.0.220.0000.00616.81
8.0.210.0070.00016.83
8.0.200.0030.00316.94
8.0.190.0030.00516.98
8.0.180.0040.00416.95
8.0.170.0030.00616.96
8.0.160.0070.00016.89
8.0.150.0000.00816.72
8.0.140.0050.00216.82
8.0.130.0030.00313.31
8.0.120.0090.00016.89
8.0.110.0040.00416.91
8.0.100.0050.00316.95
8.0.90.0000.00717.02
8.0.80.0080.00816.90
8.0.70.0080.00016.70
8.0.60.0000.00716.95
8.0.50.0040.00416.83
8.0.30.0130.00617.01
8.0.20.0100.01117.40
8.0.10.0000.00816.96
8.0.00.0100.00916.68
7.4.330.0000.00515.07
7.4.320.0040.00416.55
7.4.300.0030.00316.57
7.4.290.0060.00016.64
7.4.280.0030.00516.59
7.4.270.0040.00416.57
7.4.260.0000.00716.48
7.4.250.0080.00016.51
7.4.240.0030.00316.53
7.4.230.0040.00416.71
7.4.220.0070.01116.61
7.4.210.0120.00916.63
7.4.200.0070.00016.30
7.4.160.0100.00616.50
7.4.150.0090.01017.40
7.4.140.0100.01017.86
7.4.130.0090.00716.49
7.4.120.0100.00716.61
7.4.110.0160.00016.54
7.4.100.0070.01316.47
7.4.90.0130.00316.57
7.4.80.0080.00819.39
7.4.70.0130.00316.75
7.4.60.0100.00716.52
7.4.50.0020.00216.54
7.4.40.0180.00316.36
7.4.30.0120.00616.45
7.4.00.0110.00615.00
7.3.330.0000.00713.09
7.3.320.0030.00313.22
7.3.310.0040.00416.40
7.3.300.0000.00716.33
7.3.290.0070.00716.32
7.3.280.0080.01216.32
7.3.270.0110.00617.40
7.3.260.0030.01316.38
7.3.250.0120.00616.49
7.3.240.0100.00716.37
7.3.230.0030.01316.46
7.3.210.0150.00316.23
7.3.200.0100.01319.39
7.3.190.0070.00916.65
7.3.180.0060.01016.39
7.3.170.0080.01516.45
7.3.160.0130.00316.38
7.3.120.0110.00714.57
7.3.110.0090.00914.83
7.3.100.0130.00614.96
7.3.90.0070.00714.67
7.3.80.0000.00914.77
7.3.70.0060.01014.91
7.3.60.0000.01214.52
7.3.50.0040.00714.91
7.3.40.0070.01014.61
7.3.30.0060.00614.73
7.3.20.0120.00016.93
7.3.10.0030.01016.75
7.3.00.0100.00016.61
7.2.330.0140.01016.43
7.2.320.0030.01316.80
7.2.310.0070.01016.63
7.2.300.0100.00616.75
7.2.290.0070.01016.43
7.2.250.0070.00715.21
7.2.240.0000.01914.86
7.2.230.0060.00914.68
7.2.220.0040.01514.84
7.2.210.0030.01015.07
7.2.200.0060.01015.05
7.2.190.0070.00715.11
7.2.180.0000.01714.88
7.2.170.0000.01315.11
7.2.60.0070.00716.95
7.2.00.0090.00919.64
7.1.330.0000.01515.54
7.1.320.0040.01115.81
7.1.310.0030.00615.86
7.1.300.0110.00015.86
7.1.290.0090.00615.69
7.1.280.0000.01615.85
7.1.270.0070.00716.04
7.1.260.0050.00515.57
7.1.200.0000.01515.96
7.1.100.0000.01018.37
7.1.70.0030.00517.14
7.1.60.0070.01619.32
7.1.50.0110.01516.83
7.1.00.0100.07022.43
7.0.200.0000.00816.68
7.0.140.0000.07722.21
7.0.60.0100.07319.78
7.0.50.0030.05317.84
7.0.40.0000.05320.09
7.0.30.0300.08020.17
7.0.20.0270.05320.09
7.0.10.0130.08020.04
7.0.00.0000.08720.19
5.6.280.0030.07320.95
5.6.210.0030.07020.56
5.6.200.0130.07718.10
5.6.190.0070.06320.67
5.6.180.0570.06320.67
5.6.170.0130.04320.45
5.6.160.0130.04320.34
5.6.150.0130.05318.22
5.6.140.0130.04018.24
5.6.130.0100.05018.21
5.6.120.0070.08020.91
5.6.110.0100.08021.00
5.6.100.0000.05021.11
5.6.90.0100.05020.97
5.6.80.0130.03320.47
5.5.350.0100.03320.42
5.5.340.0070.03718.01
5.5.330.0130.07720.47
5.5.320.0330.08020.30
5.5.310.0270.05320.29
5.5.300.0130.03717.89
5.5.290.0130.07317.99
5.5.280.0030.07020.80
5.5.270.0070.05720.86
5.5.260.0200.07320.64
5.5.250.0100.07720.49
5.5.240.0200.07320.18
5.4.450.0300.05019.43
5.4.440.0270.04019.48
5.4.430.0500.04719.48
5.4.420.0630.00019.49
5.4.410.0630.00019.32
5.4.400.0600.00019.16
5.4.390.0630.00019.26
5.4.380.0670.00018.96
5.4.370.0630.00018.98
5.4.360.0600.00019.26
5.4.350.0630.00019.16
5.4.340.0600.00019.00
5.4.320.0060.04012.46
5.4.310.0100.04012.45
5.4.300.0060.04112.46
5.4.290.0080.03612.45
5.4.280.0060.03512.35
5.4.270.0040.04412.35
5.4.260.0110.03512.35
5.4.250.0040.03912.35
5.4.240.0070.03512.35
5.4.230.0070.04412.34
5.4.220.0040.03912.34
5.4.210.0040.03812.34
5.4.200.0050.03912.34
5.4.190.0080.04212.34
5.4.180.0060.03912.34
5.4.170.0070.03812.35
5.4.160.0110.03712.34
5.4.150.0070.04812.34
5.4.140.0060.03912.02
5.4.130.0060.03712.01
5.4.120.0070.03811.97
5.4.110.0070.03411.97
5.4.100.0040.04011.97
5.4.90.0020.04211.96
5.4.80.0030.03911.97
5.4.70.0050.03811.96
5.4.60.0100.04311.96
5.4.50.0070.03511.96
5.4.40.0070.03811.95
5.4.30.0070.03511.95
5.4.20.0060.03711.95
5.4.10.0060.03511.95
5.4.00.0050.04511.44
5.3.290.0090.04312.80
5.3.280.0060.04512.71
5.3.270.0060.04312.73
5.3.260.0050.04112.72
5.3.250.0060.03712.72
5.3.240.0080.04912.72
5.3.230.0100.04312.71
5.3.220.0050.04212.68
5.3.210.0050.04112.68
5.3.200.0050.03912.68
5.3.190.0040.04112.68
5.3.180.0060.03612.67
5.3.170.0080.03712.67
5.3.160.0020.04312.67
5.3.150.0040.03912.67
5.3.140.0060.03612.66
5.3.130.0070.03712.66
5.3.120.0060.04212.66
5.3.110.0070.03812.66
5.3.100.0100.03212.12
5.3.90.0020.04212.09
5.3.80.0070.03712.07
5.3.70.0070.03712.07
5.3.60.0030.03912.06
5.3.50.0030.03912.00
5.3.40.0030.04012.00
5.3.30.0090.03411.95
5.3.20.0100.03311.73
5.3.10.0050.04111.70
5.3.00.0070.04111.68
5.2.170.0070.0319.18
5.2.160.0050.0299.18
5.2.150.0050.0309.18
5.2.140.0060.0309.18
5.2.130.0050.0349.14
5.2.120.0020.0339.14
5.2.110.0070.0369.15
5.2.100.0030.0389.15
5.2.90.0070.0309.14
5.2.80.0060.0309.14
5.2.70.0060.0309.14
5.2.60.0050.0339.09
5.2.50.0070.0309.06
5.2.40.0050.0299.04
5.2.30.0050.0329.01
5.2.20.0080.0269.00
5.2.10.0020.0308.93
5.2.00.0030.0308.78
5.1.60.0060.0228.06
5.1.50.0040.0258.07
5.1.40.0030.0278.04
5.1.30.0050.0278.40
5.1.20.0030.0288.42
5.1.10.0030.0318.14
5.1.00.0030.0278.14
5.0.50.0050.0256.63
5.0.40.0040.0246.48
5.0.30.0050.0366.29
5.0.20.0050.0216.27
5.0.10.0040.0206.24
5.0.00.0050.0356.23
4.4.90.0040.0164.78
4.4.80.0060.0134.76
4.4.70.0040.0154.75
4.4.60.0040.0154.76
4.4.50.0060.0134.77
4.4.40.0030.0294.71
4.4.30.0030.0154.76
4.4.20.0030.0164.84
4.4.10.0020.0164.85
4.4.00.0030.0244.76
4.3.110.0030.0154.67
4.3.100.0040.0184.66
4.3.90.0040.0134.64
4.3.80.0060.0284.58
4.3.70.0020.0154.63
4.3.60.0030.0144.63
4.3.50.0020.0164.63
4.3.40.0030.0244.54
4.3.30.0010.0173.29
4.3.20.0040.0143.26
4.3.10.0030.0153.22
4.3.00.0070.01013.59

preferences:
39.72 ms | 401 KiB | 5 Q