3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = [1,2,3,4,5,6,7,8,9]; foreach ($a as $key => &$value) { if ($key === 4) { unset($a[$key + 1]); // var_dump(key($a)); // break; } var_dump($key); } // var_dump(key($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)
8.3.60.0130.01016.63
8.3.50.0130.00820.99
8.3.40.0110.00418.53
8.3.30.0120.00918.63
8.3.20.0080.00020.16
8.3.10.0000.00821.90
8.3.00.0000.00819.55
8.2.180.0180.00016.50
8.2.170.0040.01422.96
8.2.160.0120.00319.39
8.2.150.0050.00324.18
8.2.140.0050.00224.66
8.2.130.0030.00626.16
8.2.120.0030.00617.75
8.2.110.0060.00320.35
8.2.100.0000.01117.63
8.2.90.0040.00419.36
8.2.80.0030.00617.97
8.2.70.0050.00517.49
8.2.60.0050.00317.80
8.2.50.0080.00018.07
8.2.40.0040.00421.20
8.2.30.0080.00019.84
8.2.20.0040.00417.78
8.2.10.0040.00418.04
8.2.00.0040.00418.14
8.1.280.0140.00425.92
8.1.270.0150.00422.16
8.1.260.0050.00226.35
8.1.250.0040.00428.09
8.1.240.0000.00823.92
8.1.230.0070.00417.42
8.1.220.0000.00817.74
8.1.210.0080.00018.77
8.1.200.0070.00317.35
8.1.190.0000.00817.35
8.1.180.0060.00318.10
8.1.170.0000.00818.55
8.1.160.0070.00021.99
8.1.150.0000.00718.93
8.1.140.0080.00017.38
8.1.130.0000.00717.71
8.1.120.0040.00417.46
8.1.110.0000.00717.45
8.1.100.0040.00417.29
8.1.90.0080.00017.48
8.1.80.0040.00417.43
8.1.70.0000.00717.33
8.1.60.0000.00817.52
8.1.50.0040.00417.55
8.1.40.0070.00017.42
8.1.30.0050.00317.65
8.1.20.0050.00217.55
8.1.10.0040.00417.41
8.1.00.0080.00017.40
8.0.300.0060.00318.77
8.0.290.0070.00016.75
8.0.280.0000.00718.47
8.0.270.0070.00017.29
8.0.260.0030.00317.15
8.0.250.0030.00516.99
8.0.240.0050.00316.98
8.0.230.0030.00516.82
8.0.220.0000.00816.93
8.0.210.0030.00316.78
8.0.200.0000.00616.96
8.0.190.0080.00016.86
8.0.180.0040.00416.90
8.0.170.0000.00816.88
8.0.160.0000.00816.83
8.0.150.0000.00816.85
8.0.140.0000.00716.89
8.0.130.0030.00313.33
8.0.120.0040.00416.83
8.0.110.0000.00716.78
8.0.100.0000.00716.79
8.0.90.0070.00016.77
8.0.80.0080.00816.84
8.0.70.0040.00416.73
8.0.60.0070.00016.95
8.0.50.0000.00716.77
8.0.30.0100.01017.14
8.0.20.0110.01017.40
8.0.10.0040.00416.94
8.0.00.0060.01116.68
7.4.330.0050.00015.20
7.4.320.0000.00716.64
7.4.300.0030.00316.51
7.4.290.0030.00316.63
7.4.280.0050.00216.59
7.4.270.0000.00616.50
7.4.260.0030.00316.38
7.4.250.0000.00716.38
7.4.240.0030.00516.52
7.4.230.0060.00016.54
7.4.220.0120.00616.57
7.4.210.0070.00816.59
7.4.200.0070.00016.54
7.4.160.0070.00716.60
7.4.150.0100.00717.40
7.4.140.0090.01217.86
7.4.130.0080.01216.53
7.4.120.0090.00816.61
7.4.110.0070.01016.66
7.4.100.0100.00716.43
7.4.90.0140.00416.50
7.4.80.0090.01019.39
7.4.70.0110.00716.58
7.4.60.0160.00016.54
7.4.50.0050.00316.38
7.4.40.0070.01016.49
7.4.30.0100.00716.53
7.4.00.0060.01015.12
7.3.330.0030.00313.26
7.3.320.0050.00013.24
7.3.310.0000.00716.18
7.3.300.0000.00716.16
7.3.290.0030.00316.31
7.3.280.0080.00716.28
7.3.270.0120.00617.40
7.3.260.0100.00716.29
7.3.250.0110.00616.37
7.3.240.0070.01116.53
7.3.230.0110.00716.39
7.3.210.0080.00916.40
7.3.200.0060.00916.47
7.3.190.0150.00616.18
7.3.180.0120.00616.38
7.3.170.0210.00016.67
7.3.160.0150.00616.25
7.2.330.0120.00616.65
7.2.320.0070.01316.37
7.2.310.0090.00916.46
7.2.300.0120.00616.71
7.2.290.0070.00916.38
7.2.00.0080.01219.14
7.1.100.0030.00918.16
7.1.70.0060.00617.22
7.1.60.0070.01520.03
7.1.50.0070.00716.97
7.1.00.0030.07722.36
7.0.200.0310.00014.76
7.0.60.0070.09019.79
7.0.50.0030.08017.89
7.0.40.0200.04020.05
7.0.30.0170.05020.09
7.0.20.0430.07020.13
7.0.10.0330.07320.13
7.0.00.0070.08320.16
5.6.280.0070.05020.99
5.6.210.0070.04020.72
5.6.200.0100.06318.18
5.6.190.0000.08720.61
5.6.180.0000.04320.43
5.6.170.0330.04720.52
5.6.160.0000.04720.38
5.6.150.0030.04718.22
5.6.140.0070.05018.13
5.6.130.0070.08318.20
5.6.120.0100.03721.14
5.6.110.0070.07021.04
5.6.100.0100.07321.03
5.6.90.0100.04321.07
5.6.80.0070.03720.39
5.6.70.3970.03020.40
5.5.350.0070.07020.46
5.5.340.0030.04017.96
5.5.330.0030.04320.25
5.5.320.0430.05320.24
5.5.310.0130.04720.50
5.5.300.0070.04717.88
5.5.290.0070.05317.95
5.5.280.0070.08320.64
5.5.270.0030.04320.74
5.5.260.0200.07320.86
5.5.250.0030.09020.54
5.5.240.0100.05020.25
5.4.450.0370.06019.61
5.4.440.0530.04319.13
5.4.430.0600.05019.47
5.4.420.0470.05019.10
5.4.410.0430.05319.30
5.4.400.0400.05718.95
5.4.390.0570.05319.29
5.4.380.0500.04318.95
5.4.370.0430.04718.95
5.4.360.0370.05718.91
5.4.350.0470.04719.14
5.4.340.0400.05718.95
5.4.320.0630.04318.91
5.4.310.0570.04719.30
5.4.300.0500.05319.28
5.4.290.0500.05718.94
5.4.280.0470.05019.30
5.4.270.0570.05319.16
5.4.260.0470.05719.27
5.4.250.0470.05718.79
5.4.240.0600.04718.80
5.4.230.0530.05018.77
5.4.220.0530.05718.99
5.4.210.0530.05018.80
5.4.200.0470.04719.11
5.4.190.0400.05319.20
5.4.180.0430.05019.27
5.4.170.0400.05319.11
5.4.160.0400.06319.05
5.4.150.0570.05018.97
5.4.140.0570.05016.30
5.4.130.0500.05316.16
5.4.120.0600.04316.19
5.4.110.0470.06016.45
5.4.100.0570.04316.52
5.4.90.0500.05316.56
5.4.80.0600.04016.44
5.4.70.0070.07016.21
5.4.60.0070.06716.38
5.4.50.0030.04716.46
5.4.40.0030.05016.45
5.4.30.0370.04016.43
5.4.20.0200.04716.20
5.4.10.0030.07316.45

preferences:
88.63 ms | 401 KiB | 5 Q