3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array(10, 20); foreach($a as $k=>&$v) { unset($a[$k]); var_dump($a); } echo count($a);

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)
8.3.60.0040.01218.43
8.3.50.0110.00521.14
8.3.40.0070.00718.43
8.3.30.0110.00419.09
8.3.20.0040.00420.42
8.3.10.0090.00021.92
8.3.00.0080.00022.39
8.2.180.0070.01416.50
8.2.170.0000.01522.96
8.2.160.0170.00019.38
8.2.150.0000.00924.18
8.2.140.0130.00724.66
8.2.130.0130.00626.16
8.2.120.0040.00419.77
8.2.110.0060.00322.02
8.2.100.0090.00319.21
8.2.90.0040.00419.21
8.2.80.0040.00418.05
8.2.70.0070.00417.25
8.2.60.0040.00418.05
8.2.50.0030.00518.07
8.2.40.0050.00318.22
8.2.30.0070.00018.11
8.2.20.0070.00317.81
8.2.10.0000.00817.73
8.2.00.0000.00717.75
8.1.280.0150.00025.92
8.1.270.0050.00318.63
8.1.260.0040.00426.35
8.1.250.0080.00028.09
8.1.240.0090.00023.79
8.1.230.0000.01219.09
8.1.220.0000.00817.79
8.1.210.0000.00818.77
8.1.200.0050.00517.35
8.1.190.0000.00817.51
8.1.180.0000.00818.55
8.1.170.0040.00418.46
8.1.160.0000.00722.13
8.1.150.0020.00518.55
8.1.140.0040.00417.46
8.1.130.0070.00017.82
8.1.120.0080.00017.41
8.1.110.0100.00017.46
8.1.100.0030.00317.34
8.1.90.0030.00617.46
8.1.80.0000.00717.48
8.1.70.0070.00017.35
8.1.60.0000.00917.62
8.1.50.0040.00417.39
8.1.40.0050.00317.41
8.1.30.0060.00317.58
8.1.20.0030.00517.55
8.1.10.0000.00717.42
8.1.00.0030.00517.33
8.0.300.0040.00418.77
8.0.290.0000.00816.80
8.0.280.0000.00718.44
8.0.270.0030.00317.25
8.0.260.0060.00016.72
8.0.250.0030.00316.83
8.0.240.0090.00016.84
8.0.230.0000.00816.98
8.0.220.0030.00316.79
8.0.210.0070.00016.89
8.0.200.0060.00016.86
8.0.190.0040.00716.94
8.0.180.0050.00316.87
8.0.170.0040.00416.79
8.0.160.0040.00416.97
8.0.150.0040.00416.85
8.0.140.0050.00216.89
8.0.130.0030.00313.38
8.0.120.0020.00516.76
8.0.110.0040.00416.88
8.0.100.0040.00416.82
8.0.90.0000.00716.75
8.0.80.0090.00616.85
8.0.70.0050.00316.86
8.0.60.0040.00416.80
8.0.50.0000.00816.87
8.0.30.0120.00617.05
8.0.20.0120.00617.40
8.0.10.0000.00717.07
8.0.00.0060.01116.69
7.4.330.0000.00515.00
7.4.320.0000.00616.55
7.4.300.0000.00716.51
7.4.290.0030.00316.49
7.4.280.0050.00216.54
7.4.270.0000.00716.52
7.4.260.0090.00016.57
7.4.250.0060.00316.45
7.4.240.0020.00616.49
7.4.230.0020.00516.52
7.4.220.0120.01616.54
7.4.210.0090.00716.53
7.4.200.0030.00316.62
7.4.190.0000.00716.68
7.4.160.0090.00616.59
7.4.150.0060.01217.40
7.4.140.0090.00917.86
7.4.130.0080.01116.61
7.4.120.0080.01216.54
7.4.110.0090.00916.72
7.4.100.0100.00716.56
7.4.90.0070.01116.53
7.4.80.0200.00319.39
7.4.70.0110.00616.43
7.4.60.0060.01216.59
7.4.50.0000.00816.54
7.4.40.0090.00922.77
7.4.30.0080.00816.55
7.4.00.0040.00814.90
7.3.330.0030.00313.11
7.3.320.0000.00513.17
7.3.310.0000.00716.32
7.3.300.0070.00016.29
7.3.290.0090.00416.23
7.3.280.0080.00816.22
7.3.270.0170.00017.40
7.3.260.0080.00816.30
7.3.250.0100.00716.39
7.3.240.0090.00916.41
7.3.230.0150.00616.54
7.3.210.0140.00716.61
7.3.200.0090.00616.34
7.3.190.0100.00616.58
7.3.180.0080.00816.57
7.3.170.0040.01116.30
7.3.160.0100.00616.38
7.3.120.0030.01014.59
7.3.10.0090.00916.24
7.3.00.0120.00616.45
7.2.330.0140.00416.48
7.2.320.0110.01116.66
7.2.310.0100.00716.80
7.2.300.0040.01316.63
7.2.290.0060.00916.39
7.2.130.0170.00816.70
7.2.120.0190.00616.94
7.2.110.0090.00916.36
7.2.100.0130.00916.50
7.2.90.0040.01516.21
7.2.80.0130.00616.31
7.2.70.0140.00816.56
7.2.60.0070.01416.55
7.2.50.0150.00916.53
7.2.40.0150.00616.62
7.2.30.0230.00816.64
7.2.20.0090.00916.49
7.2.10.0120.00816.17
7.2.00.0060.01018.21
7.1.250.0170.00915.39
7.1.200.0080.00415.86
7.1.100.0070.00717.93
7.1.70.0040.00417.21
7.1.60.0110.01119.82
7.1.50.0070.01817.04
7.1.00.0030.03322.32
7.0.200.0140.00514.95
7.0.140.0100.06722.09
7.0.60.0030.06019.93
7.0.50.0100.07717.87
7.0.40.0130.08020.24
7.0.30.0570.07320.16
7.0.20.0230.05320.41
7.0.10.0070.05020.16
7.0.00.0070.08720.22
5.6.280.0100.06721.09
5.6.210.0170.07020.46
5.6.200.0070.04718.24
5.6.190.0130.04720.67
5.6.180.0170.05020.43
5.6.170.0270.04720.50
5.6.160.0070.08020.41
5.6.150.0070.08018.22
5.6.140.0100.08318.15
5.6.130.0030.07318.08
5.6.120.0070.08320.90
5.6.110.0030.08720.98
5.6.100.0070.07721.11
5.6.90.0130.07020.92
5.6.80.0100.05320.50
5.6.70.3700.04020.52
5.5.350.0100.04320.48
5.5.340.0170.07017.95
5.5.330.0100.08020.43
5.5.320.0330.07320.29
5.5.310.0300.07320.18
5.5.300.0030.07718.02
5.5.290.0070.08317.92
5.5.280.0130.04720.68
5.5.270.0070.06720.64
5.5.260.0070.05020.75
5.5.250.0070.07020.65
5.5.240.0330.07020.12
5.4.450.0900.04719.47
5.4.440.0670.07019.61
5.4.430.0370.07319.51
5.4.420.0670.06319.46
5.4.410.0800.05719.19
5.4.400.0770.07318.65
5.4.390.1630.05018.56
5.4.380.1130.07318.68
5.4.370.0100.05318.51
5.4.360.0200.04018.50
5.4.350.0090.04611.98
5.4.340.0060.04311.97
5.4.320.0060.03612.46
5.4.310.0100.03312.45
5.4.300.0060.03712.46
5.4.290.0050.03912.45
5.4.280.0050.03512.35
5.4.270.0050.03612.35
5.4.260.0080.04112.35
5.4.250.0130.04718.72
5.4.240.0100.08018.77
5.4.230.0200.06018.88
5.4.220.0030.06019.01
5.4.210.0130.06718.93
5.4.200.0070.05718.65
5.4.190.0070.08318.89
5.4.180.0030.05719.00
5.4.170.0000.05718.73
5.4.160.0200.06018.68
5.4.150.0070.06018.89
5.4.140.0070.05016.43
5.4.130.0130.05016.24
5.4.120.0100.07316.27
5.4.110.0100.05316.48
5.4.100.0130.04316.32
5.4.90.0030.05016.46
5.4.80.0000.07716.24
5.4.70.0200.06016.27
5.4.60.0030.06316.33
5.4.50.0230.05716.20
5.4.40.0000.05716.47
5.4.30.0000.05316.46
5.4.20.0130.04716.38
5.4.10.0030.05316.23
5.4.00.0070.04715.73
5.3.290.0030.04612.80
5.3.280.0100.06314.59
5.3.270.0100.05014.45
5.3.260.0100.06714.64
5.3.250.0030.05714.60
5.3.240.0170.05314.52
5.3.230.0070.05314.37
5.3.220.0070.08014.39
5.3.210.0030.08314.45
5.3.200.0100.04714.56
5.3.190.0030.06714.41
5.3.180.0100.05014.42
5.3.170.0170.06014.57
5.3.160.0100.05714.40
5.3.150.0070.07014.41
5.3.140.0100.04714.70
5.3.130.0130.07314.56
5.3.120.0130.05714.40
5.3.110.0030.05314.64
5.3.100.0030.05014.04
5.3.90.0030.07314.02
5.3.80.0100.04313.71
5.3.70.0070.05013.89
5.3.60.0070.05713.88
5.3.50.0170.04313.94
5.3.40.0070.05013.78
5.3.30.0070.04713.79
5.3.20.0000.05313.79
5.3.10.0030.07313.51
5.3.00.0030.05313.55
5.2.170.0000.04711.03
5.2.160.0070.04011.06
5.2.150.0030.04711.15
5.2.140.0030.06711.16
5.2.130.0100.04711.02
5.2.120.0030.04011.03
5.2.110.0030.04310.86
5.2.100.0100.03311.10
5.2.90.0130.03011.19
5.2.80.0070.04011.11
5.2.70.0000.04710.98
5.2.60.0130.03710.98
5.2.50.0100.03711.04
5.2.40.0070.03711.11
5.2.30.0000.04310.92
5.2.20.0030.05010.71
5.2.10.0100.03311.07
5.2.00.0070.03710.79
5.1.60.0070.03010.10
5.1.50.0070.04010.04
5.1.40.0030.0339.89
5.1.30.0030.04010.38
5.1.20.0070.04710.56
5.1.10.0000.03710.13
5.1.00.0000.05710.09
5.0.50.0070.0278.63
5.0.40.0070.0238.41
5.0.30.0000.0438.37
5.0.20.0070.0338.15
5.0.10.0030.0308.40
5.0.00.0000.0438.14
4.4.90.0070.0177.13
4.4.80.0000.0277.13
4.4.70.0070.0177.13
4.4.60.0030.0307.13
4.4.50.0000.0237.13
4.4.40.0000.0377.13
4.4.30.0100.0137.13
4.4.20.0030.0237.13
4.4.10.0030.0207.13
4.4.00.0030.0437.13
4.3.110.0030.0207.13
4.3.100.0000.0237.13
4.3.90.0030.0207.13
4.3.80.0030.0337.13
4.3.70.0070.0177.13
4.3.60.0100.0237.13
4.3.50.0070.0177.13
4.3.40.0030.0337.13
4.3.30.0070.0177.13
4.3.20.0000.0237.13
4.3.10.0070.0207.13
4.3.00.0200.0206.63

preferences:
39.32 ms | 401 KiB | 5 Q