3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = array("person1" => array(0 => array('k1'=>'v1', 'k2'=>'v2'), 1 => array('k1'=>'v1', 'k2'=>'v2')), "person2" => array(0 => array('k1'=>'v1', 'k2'=>'v2'), 1 => array('k1'=>'v1', 'k2'=>'v2'))); $reset_key = reset($array); $first_key = key($array); echo $reset_key[0];

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)
8.3.70.0140.00716.63
8.3.60.0070.00718.31
8.3.50.0090.01021.93
8.3.40.0040.01118.52
8.3.30.0140.00019.01
8.3.20.0040.00420.20
8.3.10.0060.01020.66
8.3.00.0060.00319.38
8.2.180.0100.01016.50
8.2.170.0110.00422.96
8.2.160.0070.00720.38
8.2.150.0080.00024.18
8.2.140.0060.00324.66
8.2.130.0020.00526.16
8.2.120.0080.00020.87
8.2.110.0060.00322.21
8.2.100.0040.00717.91
8.2.90.0080.00019.33
8.2.80.0040.00417.97
8.2.70.0090.00017.63
8.2.60.0000.00818.16
8.2.50.0040.00418.07
8.2.40.0030.00518.34
8.2.30.0070.00319.35
8.2.20.0040.00417.79
8.2.10.0040.00417.98
8.2.00.0000.00717.59
8.1.280.0070.00725.92
8.1.270.0050.00323.91
8.1.260.0070.00026.35
8.1.250.0040.00428.09
8.1.240.0040.00423.92
8.1.230.0030.01019.03
8.1.220.0000.00817.75
8.1.210.0040.00418.77
8.1.200.0000.00817.35
8.1.190.0080.00017.10
8.1.180.0000.00818.10
8.1.170.0050.00318.56
8.1.160.0040.00421.89
8.1.150.0000.00818.68
8.1.140.0040.00417.29
8.1.130.0070.00017.72
8.1.120.0040.00417.27
8.1.110.0020.00517.43
8.1.100.0000.00817.44
8.1.90.0030.00617.29
8.1.80.0040.00417.29
8.1.70.0000.00717.27
8.1.60.0000.00917.49
8.1.50.0090.00017.46
8.1.40.0040.00417.42
8.1.30.0040.00417.51
8.1.20.0030.00517.55
8.1.10.0060.00317.43
8.1.00.0070.00017.58
8.0.300.0020.00518.77
8.0.290.0000.00716.75
8.0.280.0030.00318.27
8.0.270.0050.00217.24
8.0.260.0000.00717.15
8.0.250.0070.00017.05
8.0.240.0000.00817.05
8.0.230.0000.00716.85
8.0.220.0040.00616.90
8.0.210.0000.00616.76
8.0.200.0060.00016.91
8.0.190.0070.00016.90
8.0.180.0000.00816.79
8.0.170.0040.00416.91
8.0.160.0040.00416.88
8.0.150.0030.00316.83
8.0.140.0000.00716.74
8.0.130.0030.00313.27
8.0.120.0080.00016.74
8.0.110.0000.00716.72
8.0.100.0050.00216.87
8.0.90.0000.00816.93
8.0.80.0030.01316.94
8.0.70.0070.00016.79
8.0.60.0000.00816.82
8.0.50.0020.00516.76
8.0.30.0120.00717.13
8.0.20.0080.01417.40
8.0.10.0040.00417.05
8.0.00.0050.01316.63
7.4.330.0050.00015.01
7.4.320.0030.00316.50
7.4.300.0030.00316.49
7.4.290.0040.00416.52
7.4.280.0040.00416.56
7.4.270.0060.00016.49
7.4.260.0000.00716.50
7.4.250.0040.00416.54
7.4.240.0050.00216.49
7.4.230.0070.00016.62
7.4.220.0060.01616.59
7.4.210.0040.01216.62
7.4.200.0030.00316.57
7.4.160.0060.01316.23
7.4.150.0120.00617.40
7.4.140.0100.01217.86
7.4.130.0100.00616.50
7.4.120.0090.00916.44
7.4.110.0160.00016.52
7.4.100.0030.01416.54
7.4.90.0120.00616.64
7.4.80.0120.01219.39
7.4.70.0100.00716.48
7.4.60.0100.00616.32
7.4.50.0080.00016.48
7.4.40.0080.00816.65
7.4.30.0060.00916.27
7.4.00.0070.00715.06
7.3.330.0030.00213.13
7.3.320.0030.00312.99
7.3.310.0000.00716.31
7.3.300.0000.00616.30
7.3.290.0090.00616.28
7.3.280.0090.00616.29
7.3.270.0090.00917.40
7.3.260.0090.00916.40
7.3.250.0120.00716.40
7.3.240.0120.00616.34
7.3.230.0130.01016.39
7.3.210.0150.00216.51
7.3.200.0070.01019.39
7.3.190.0140.00316.18
7.3.180.0090.00616.25
7.3.170.0030.01416.27
7.3.160.0090.00616.40
7.2.330.0100.00716.74
7.2.320.0150.00616.78
7.2.310.0070.00516.70
7.2.300.0130.00316.73
7.2.290.0090.00616.50
7.2.60.0060.00616.76
7.2.00.0060.00919.05
7.1.200.0030.00915.76
7.1.100.0070.00718.30
7.1.70.0070.00317.02
7.1.60.0130.01019.61
7.1.50.0110.00816.97
7.1.00.0030.07722.30
7.0.200.0000.00816.37
7.0.140.0000.07722.01
7.0.60.0070.08319.79
7.0.50.0030.06017.86
7.0.40.0030.06320.40
7.0.30.0330.05020.21
7.0.20.0230.06720.20
7.0.10.0000.10020.15
7.0.00.0070.08319.96
5.6.280.0100.06720.82
5.6.210.0100.07720.46
5.6.200.0030.05318.22
5.6.190.0100.08020.35
5.6.180.0270.08020.43
5.6.170.0230.08320.49
5.6.160.0130.03320.43
5.6.150.0070.06318.18
5.6.140.0030.08318.21
5.6.130.0000.07018.16
5.6.120.0030.04021.09
5.6.110.0070.06720.98
5.6.100.0100.07720.97
5.6.90.0100.07721.12
5.6.80.0130.03320.43
5.6.70.4230.03720.39
5.5.350.0170.07320.33
5.5.340.0170.04018.03
5.5.330.0070.05720.07
5.5.320.0200.05020.32
5.5.310.0200.04320.28
5.5.300.0000.04317.90
5.5.290.0100.08018.02
5.5.280.0030.07320.73
5.5.270.0070.05020.61
5.5.260.0070.04020.79
5.5.250.0070.08320.59
5.5.240.0370.06720.16
5.4.450.0200.05719.11
5.4.440.0230.04019.13
5.4.430.0130.04319.45
5.4.420.0330.06719.24
5.4.410.0200.05319.43
5.4.400.0270.03718.79
5.4.390.0200.07318.93
5.4.380.0630.04719.06
5.4.370.0300.04719.10
5.4.360.0300.04718.79
5.4.350.0230.06718.92
5.4.340.0300.04319.09
5.4.320.0200.04019.25
5.4.310.0530.02719.16
5.4.300.0200.07319.25
5.4.290.0230.05318.91
5.4.280.0170.06019.16
5.4.270.0300.03718.80
5.4.260.0230.04018.92
5.4.250.0270.05319.07
5.4.240.0200.05018.94
5.4.230.0200.05319.15
5.4.220.0300.04719.07
5.4.210.0230.06019.06
5.4.200.0270.06719.21
5.4.190.0300.07019.08
5.4.180.0330.04319.07
5.4.170.0330.06719.04
5.4.160.0270.06718.90
5.4.150.0330.06318.76
5.4.140.0330.05016.35
5.4.130.0200.03316.30
5.4.120.0330.06316.44
5.4.110.0270.06716.43
5.4.100.0270.04016.41
5.4.90.0270.06716.21
5.4.80.0370.03016.29
5.4.70.0170.04316.04
5.4.60.0270.05316.47
5.4.50.0200.05316.43
5.4.40.0200.03316.45
5.4.30.0230.06316.28
5.4.20.0270.04016.46
5.4.10.0230.03716.46
5.4.00.0270.03015.82
5.3.290.0230.06714.50
5.3.280.0200.06314.43
5.3.270.0270.07314.48
5.3.260.0400.06314.59
5.3.250.0270.07014.45
5.3.240.0270.06314.48
5.3.230.0270.06714.62
5.3.220.0430.05714.66
5.3.210.0330.06014.52
5.3.200.0430.06014.52
5.3.190.0300.07314.42
5.3.180.0400.06014.59
5.3.170.0330.07014.41
5.3.160.0230.07014.50
5.3.150.0270.06714.49
5.3.140.0300.04714.50
5.3.130.0270.04714.42
5.3.120.0230.04314.59
5.3.110.0270.04014.57
5.3.100.0330.06714.08
5.3.90.0170.04313.89
5.3.80.0170.05014.00
5.3.70.0270.07013.93
5.3.60.0230.04014.09
5.3.50.0230.06314.01
5.3.40.0270.06713.85
5.3.30.0330.03713.93
5.3.20.0270.05313.54
5.3.10.0200.04313.45
5.3.00.0270.03013.48
5.2.170.0230.05311.16
5.2.160.0230.05311.00
5.2.150.0170.05311.20
5.2.140.0230.06011.00
5.2.130.0230.04310.96
5.2.120.0170.05711.15
5.2.110.0200.02711.10
5.2.100.0230.04010.96
5.2.90.0200.03711.14
5.2.80.0230.03311.04
5.2.70.0270.05311.18
5.2.60.0270.05010.90
5.2.50.0230.06011.17
5.2.40.0230.03311.05
5.2.30.0200.02710.90
5.2.20.0270.05010.86
5.2.10.0270.05310.82
5.2.00.0170.04710.66
5.1.60.0270.0409.96
5.1.50.0130.0439.96
5.1.40.0130.0279.89
5.1.30.0130.03010.32
5.1.20.0200.02710.32
5.1.10.0070.03310.23
5.1.00.0200.05010.13
5.0.50.0130.0438.52
5.0.40.0200.0378.42
5.0.30.0100.0508.20
5.0.20.0100.0278.20
5.0.10.0170.0338.04
5.0.00.0100.0638.28
4.4.90.0100.0206.75
4.4.80.0170.0206.75
4.4.70.0170.0276.75
4.4.60.0100.0336.75
4.4.50.0100.0336.75
4.4.40.0100.0536.75
4.4.30.0170.0276.75
4.4.20.0070.0176.75
4.4.10.0130.0306.75
4.4.00.0130.0336.75
4.3.110.0100.0376.75
4.3.100.0100.0206.75
4.3.90.0100.0176.75
4.3.80.0100.0276.75
4.3.70.0100.0306.75
4.3.60.0130.0336.75
4.3.50.0130.0306.75
4.3.40.0070.0436.75
4.3.30.0030.0336.75
4.3.20.0070.0276.75
4.3.10.0070.0236.75
4.3.00.0100.0276.75

preferences:
34.99 ms | 401 KiB | 5 Q