3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = array( 'a' => 'A', 'b' => 'B', 'c' => 'C'); var_dump($arr); foreach ($arr as &$val) { if ($val == 'B') { unset($val); } } var_dump($arr);

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)
8.3.60.0120.00916.63
8.3.50.0120.00517.19
8.3.40.0110.00318.70
8.3.30.0070.01018.45
8.3.20.0080.00018.65
8.3.10.0030.00620.53
8.3.00.0080.00019.01
8.2.180.0040.01118.04
8.2.170.0070.00722.96
8.2.160.0030.01421.06
8.2.150.0080.00024.18
8.2.140.0000.00924.66
8.2.130.0000.00726.16
8.2.120.0000.00819.48
8.2.110.0070.00321.04
8.2.100.0060.00617.72
8.2.90.0030.00619.05
8.2.80.0040.00418.03
8.2.70.0040.00417.63
8.2.60.0040.00417.93
8.2.50.0000.00818.07
8.2.40.0050.00317.97
8.2.30.0050.00318.00
8.2.20.0040.00417.64
8.2.10.0040.00417.78
8.2.00.0050.00217.61
8.1.280.0070.00725.92
8.1.270.0080.00624.66
8.1.260.0080.00026.35
8.1.250.0080.00028.09
8.1.240.0060.00320.70
8.1.230.0060.00621.05
8.1.220.0000.00817.74
8.1.210.0000.00818.91
8.1.200.0030.00617.35
8.1.190.0090.00017.51
8.1.180.0050.00318.10
8.1.170.0070.00018.84
8.1.160.0000.00718.86
8.1.150.0040.00418.54
8.1.140.0040.00417.36
8.1.130.0030.00317.73
8.1.120.0000.00917.39
8.1.110.0040.00417.29
8.1.100.0070.00017.48
8.1.90.0090.00017.39
8.1.80.0000.00817.50
8.1.70.0030.00317.45
8.1.60.0000.00917.41
8.1.50.0000.00717.49
8.1.40.0030.00517.50
8.1.30.0000.00717.48
8.1.20.0050.00317.57
8.1.10.0000.00817.52
8.1.00.0030.00617.45
8.0.300.0000.00819.78
8.0.290.0060.00316.58
8.0.280.0000.00718.48
8.0.270.0040.00417.24
8.0.260.0030.00316.84
8.0.250.0040.00416.84
8.0.240.0090.00016.82
8.0.230.0000.00716.85
8.0.220.0030.00316.92
8.0.210.0000.00716.84
8.0.200.0070.00016.93
8.0.190.0030.00517.00
8.0.180.0000.00716.96
8.0.170.0030.00516.90
8.0.160.0000.00716.85
8.0.150.0060.00316.79
8.0.140.0030.00816.74
8.0.130.0000.00513.27
8.0.120.0070.00016.74
8.0.110.0000.00816.93
8.0.100.0000.00716.86
8.0.90.0000.00716.86
8.0.80.0030.01316.76
8.0.70.0030.00516.95
8.0.60.0000.00716.83
8.0.50.0000.00816.89
8.0.30.0120.00817.08
8.0.20.0160.00416.93
8.0.10.0040.00417.02
8.0.00.0120.00816.64
7.4.330.0020.00212.98
7.4.320.0030.00616.57
7.4.300.0070.00016.57
7.4.290.0030.00316.61
7.4.280.0000.00716.49
7.4.270.0070.00016.35
7.4.260.0030.00313.29
7.4.250.0000.00816.54
7.4.240.0040.00416.64
7.4.230.0000.00716.42
7.4.220.0110.00716.43
7.4.210.0110.00516.56
7.4.200.0050.00316.52
7.4.190.0030.00316.67
7.4.160.0130.00316.63
7.4.150.0100.00716.32
7.4.140.0120.00916.52
7.4.130.0080.00816.51
7.4.120.0150.00316.42
7.4.110.0150.00616.57
7.4.100.0070.01416.68
7.4.90.0050.01116.53
7.4.80.0080.00816.27
7.4.70.0100.00716.44
7.4.60.0120.00616.44
7.4.50.0040.00416.52
7.4.40.0030.01116.67
7.4.30.0100.01316.38
7.4.00.0090.00814.81
7.3.330.0000.00613.09
7.3.320.0000.00713.13
7.3.310.0030.00316.08
7.3.300.0050.00216.26
7.3.290.0060.01316.29
7.3.280.0090.00716.26
7.3.270.0120.00616.48
7.3.260.0090.01316.52
7.3.250.0100.01116.53
7.3.240.0110.01116.26
7.3.230.0060.01216.19
7.3.210.0100.00716.13
7.3.200.0110.00819.39
7.3.190.0100.01016.52
7.3.180.0060.00916.38
7.3.170.0060.00916.48
7.3.160.0070.00916.46
7.3.120.0090.00814.77
7.3.110.0070.00914.85
7.3.100.0050.00814.67
7.3.90.0040.00814.67
7.3.80.0050.00914.68
7.3.70.0050.00914.77
7.3.60.0030.00814.79
7.3.50.0030.01214.74
7.3.40.0070.00614.76
7.3.30.0070.00614.67
7.3.20.0090.00516.57
7.3.10.0070.00716.61
7.3.00.0100.00316.68
7.2.330.0070.01016.62
7.2.320.0110.00716.32
7.2.310.0120.00616.71
7.2.300.0090.01216.55
7.2.290.0060.01216.74
7.2.250.0090.01015.02
7.2.240.0070.01214.98
7.2.230.0050.00915.11
7.2.220.0060.00614.78
7.2.210.0080.00515.04
7.2.200.0080.00714.93
7.2.190.0030.01114.99
7.2.180.0070.00715.05
7.2.170.0050.00814.87
7.2.00.0060.00919.55
7.1.330.0050.00815.68
7.1.320.0040.00815.80
7.1.310.0080.00715.67
7.1.300.0030.00715.62
7.1.290.0070.00515.71
7.1.280.0050.00715.67
7.1.270.0030.00915.68
7.1.260.0100.00215.77
7.1.100.0040.01118.18
7.1.70.0000.00716.81
7.1.60.0120.01219.40
7.1.50.0090.00616.95
7.1.00.0000.03722.37
7.0.200.0250.00614.73
7.0.140.0070.07022.05
7.0.120.0070.07022.04
7.0.60.0070.07019.90
7.0.50.0100.08017.88
7.0.40.0100.06320.10
7.0.30.0200.06720.16
7.0.20.0270.05719.99
7.0.10.0070.04320.00
7.0.00.0070.05320.16
5.6.280.0070.07020.99
5.6.210.0100.07020.56
5.6.200.0070.06718.19
5.6.190.0130.08320.77
5.6.180.0430.06020.39
5.6.170.0270.07320.38
5.6.160.0030.05320.37
5.6.150.0070.08018.20
5.6.140.0030.04318.11
5.6.130.0070.08718.11
5.6.120.0030.05721.12
5.6.110.0000.04320.95
5.6.100.0030.08321.01
5.6.90.0170.08021.05
5.6.80.0100.07720.36
5.5.350.0000.08320.37
5.5.340.0030.06018.00
5.5.330.0070.04320.15
5.5.320.0130.03320.28
5.5.310.0270.04020.27
5.5.300.0100.06017.98
5.5.290.0130.05317.89
5.5.280.0000.04720.76
5.5.270.0000.04720.88
5.5.260.0130.07320.75
5.5.250.0070.03720.61
5.5.240.0370.06720.36
5.4.450.0100.07719.24
5.4.440.0070.04019.24
5.4.430.0030.04319.11
5.4.420.0070.08019.46
5.4.410.0070.06019.35
5.4.400.0030.03719.08
5.4.390.0070.03719.18
5.4.380.0070.04019.15
5.4.370.0130.05319.20
5.4.360.0100.07719.08
5.4.350.0070.05719.16
5.4.340.0100.07019.15
5.4.320.0070.07319.11
5.4.310.0070.07319.12
5.4.300.0130.07019.17
5.4.290.0100.04319.18
5.4.280.0130.07019.08
5.4.270.0100.05319.08
5.4.260.0100.07718.79
5.4.250.0130.04019.14
5.4.240.0130.07318.80
5.4.230.0130.07719.13
5.4.220.0100.07319.08
5.4.210.0030.07719.00
5.4.200.0100.07319.15
5.4.190.0100.07319.18
5.4.180.0170.03019.13
5.4.170.0070.05719.17
5.4.160.0070.04719.15
5.4.150.0070.08019.05
5.4.140.0130.03316.25
5.4.130.0100.04716.48
5.4.120.0030.06016.36
5.4.110.0130.05316.41
5.4.100.0070.03716.36
5.4.90.0170.05716.20
5.4.80.0030.04016.38
5.4.70.0070.07016.35
5.4.60.0070.06316.28
5.4.50.0200.06016.36
5.4.40.0000.07316.25
5.4.30.0030.04316.58
5.4.20.0170.05316.25
5.4.10.0070.06316.29
5.4.00.0070.03315.66
5.3.290.0130.07314.45
5.3.280.0070.06714.51
5.3.270.0100.07314.53
5.3.260.0100.04314.54
5.3.250.0000.06014.48
5.3.240.0030.08314.69
5.3.230.0100.07314.41
5.3.220.0030.07314.52
5.3.210.0070.04714.53
5.3.200.0070.07014.54
5.3.190.0100.05714.51
5.3.180.0030.06714.49
5.3.170.0070.08014.50
5.3.160.0130.07314.51
5.3.150.0100.04014.34
5.3.140.0100.04314.48
5.3.130.0070.03714.47
5.3.120.0030.05014.47
5.3.110.0000.04314.50
5.3.100.0030.07313.82
5.3.90.0070.06713.95
5.3.80.0030.03713.94
5.3.70.0070.07013.99
5.3.60.0070.07313.97
5.3.50.0000.05713.90
5.3.40.0170.06713.89
5.3.30.0100.03313.84
5.3.20.0070.04713.64
5.3.10.0070.07013.49
5.3.00.0100.07313.56
5.2.170.0030.04311.30
5.2.160.0030.03311.11
5.2.150.0070.06011.07
5.2.140.0030.05711.30
5.2.130.0070.04711.18
5.2.120.0100.05710.98
5.2.110.0000.03310.96
5.2.100.0070.05311.03
5.2.90.0130.04011.00
5.2.80.0030.04311.06
5.2.70.0070.06011.08
5.2.60.0000.05711.03
5.2.50.0070.03710.98
5.2.40.0030.05310.88
5.2.30.0030.06010.82
5.2.20.0000.05310.77
5.2.10.0130.05310.76
5.2.00.0070.04310.70
5.1.60.0070.03010.05
5.1.50.0100.0479.94
5.1.40.0030.02710.02
5.1.30.0070.05310.34
5.1.20.0100.05310.21
5.1.10.0070.02310.04
5.1.00.0000.03310.05
5.0.50.0000.0338.45
5.0.40.0100.0338.42
5.0.30.0030.0678.29
5.0.20.0070.0408.16
5.0.10.0030.0278.13
5.0.00.0000.0578.11
4.4.90.0130.0077.88
4.4.80.0000.0237.88
4.4.70.0000.0307.88
4.4.60.0030.0237.88
4.4.50.0030.0307.88
4.4.40.0070.0337.88
4.4.30.0000.0277.88
4.4.20.0000.0377.88
4.4.10.0000.0337.88
4.4.00.0070.0477.88
4.3.110.0030.0237.88
4.3.100.0030.0337.88
4.3.90.0030.0277.88
4.3.80.0030.0277.88
4.3.70.0000.0337.88
4.3.60.0030.0337.88
4.3.50.0030.0277.88
4.3.40.0030.0507.88
4.3.30.0000.0207.88
4.3.20.0000.0177.88
4.3.10.0000.0277.88
4.3.00.0030.0137.88

preferences:
41.87 ms | 401 KiB | 5 Q