3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array("one" => 1, "two" => 2); $firstKey = reset(array_keys($a)); echo $firstKey . "\n";

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)
8.3.60.0100.00718.31
8.3.50.0090.00921.97
8.3.40.0100.00718.86
8.3.30.0040.01818.79
8.3.20.0070.00020.21
8.3.10.0000.00822.08
8.3.00.0000.00822.23
8.2.180.0110.00716.50
8.2.170.0160.00322.96
8.2.160.0030.01020.98
8.2.150.0080.00024.18
8.2.140.0060.00324.66
8.2.130.0070.00726.16
8.2.120.0070.00317.75
8.2.110.0070.00320.59
8.2.100.0090.00317.71
8.2.90.0040.00419.02
8.2.80.0080.00018.04
8.2.70.0060.00317.63
8.2.60.0000.00818.03
8.2.50.0060.00318.07
8.2.40.0080.00019.85
8.2.30.0000.00817.94
8.2.20.0030.00517.65
8.2.10.0090.00017.75
8.2.00.0040.00417.79
8.1.280.0140.00725.92
8.1.270.0030.00622.19
8.1.260.0050.00226.35
8.1.250.0080.00328.09
8.1.240.0030.00622.13
8.1.230.0040.00723.96
8.1.220.0070.00017.78
8.1.210.0060.00318.77
8.1.200.0000.00917.34
8.1.190.0080.00017.40
8.1.180.0000.00818.72
8.1.170.0040.00418.50
8.1.160.0030.00621.93
8.1.150.0000.00718.57
8.1.140.0000.00717.42
8.1.130.0030.00317.70
8.1.120.0000.00717.39
8.1.110.0000.00717.29
8.1.100.0000.00817.37
8.1.90.0030.00417.38
8.1.80.0030.00317.21
8.1.70.0030.00517.36
8.1.60.0030.00917.49
8.1.50.0000.00817.41
8.1.40.0040.00417.39
8.1.30.0000.00817.47
8.1.20.0080.00017.62
8.1.10.0000.00717.37
8.1.00.0030.00617.33
8.0.300.0040.00418.77
8.0.290.0070.00017.18
8.0.280.0000.00718.45
8.0.270.0080.00017.24
8.0.260.0000.00716.82
8.0.250.0030.00316.97
8.0.240.0040.00416.96
8.0.230.0070.00017.03
8.0.220.0040.00416.79
8.0.210.0000.00716.88
8.0.200.0030.00316.98
8.0.190.0040.00416.87
8.0.180.0000.00716.86
8.0.170.0040.00416.93
8.0.160.0000.00716.81
8.0.150.0070.00016.78
8.0.140.0030.00516.96
8.0.130.0030.00313.34
8.0.120.0040.00416.94
8.0.110.0050.00316.91
8.0.100.0020.00516.91
8.0.90.0000.00716.87
8.0.80.0110.00416.89
8.0.70.0070.00016.98
8.0.60.0040.00416.99
8.0.50.0040.00416.77
8.0.30.0110.00917.08
8.0.20.0100.00717.40
8.0.10.0000.00816.87
8.0.00.0140.00816.75
7.4.330.0000.00415.00
7.4.320.0030.00316.58
7.4.300.0000.00616.53
7.4.290.0080.00416.45
7.4.280.0030.00616.52
7.4.270.0070.00016.40
7.4.260.0000.00716.52
7.4.250.0080.00016.40
7.4.240.0020.00516.46
7.4.230.0040.00416.48
7.4.220.0100.01016.55
7.4.210.0100.00516.45
7.4.200.0030.00316.56
7.4.190.0000.00716.66
7.4.160.0040.01216.50
7.4.150.0100.00717.40
7.4.140.0140.00617.86
7.4.130.0150.00216.29
7.4.120.0140.00316.50
7.4.110.0040.01316.39
7.4.100.0110.00716.48
7.4.90.0170.00016.48
7.4.80.0090.00619.39
7.4.70.0160.00416.54
7.4.60.0040.01216.56
7.4.50.0030.00516.56
7.4.40.0070.01122.77
7.4.30.0130.00916.52
7.4.00.0070.00714.75
7.3.330.0030.00313.05
7.3.320.0000.00513.18
7.3.310.0030.00316.25
7.3.300.0070.00016.29
7.3.290.0000.01416.19
7.3.280.0050.01116.24
7.3.270.0140.00317.40
7.3.260.0150.00616.43
7.3.250.0030.01616.40
7.3.240.0090.01216.44
7.3.230.0030.01316.39
7.3.210.0030.01316.37
7.3.200.0100.00519.39
7.3.190.0130.01016.39
7.3.180.0130.00316.15
7.3.170.0060.00916.30
7.3.160.0120.00816.20
7.3.120.0040.01114.98
7.2.330.0110.00816.42
7.2.320.0090.00616.74
7.2.310.0030.01316.89
7.2.300.0080.00816.46
7.2.290.0100.01016.69
7.2.60.0060.00916.99
7.2.00.0040.01219.54
7.1.200.0110.00415.63
7.1.100.0000.01018.39
7.1.70.0030.00717.13
7.1.60.0030.01719.82
7.1.50.0070.01316.63
7.1.00.0070.08322.48
7.0.200.0030.01016.68
7.0.140.0000.07722.11
7.0.90.0070.08719.86
7.0.80.0070.04719.88
7.0.70.0330.08319.96
7.0.60.0570.08319.93
7.0.50.0470.07320.27
7.0.40.0100.08720.08
7.0.30.0070.06720.15
7.0.20.0130.06019.93
7.0.10.0170.06720.11
7.0.00.0030.04720.00
5.6.280.0070.07020.81
5.6.230.0100.08320.71
5.6.220.0100.05320.48
5.6.210.0170.03320.69
5.6.200.0130.08320.96
5.6.190.0200.04720.93
5.6.180.0170.08021.16
5.6.170.0170.07321.07
5.6.160.0100.08021.00
5.6.150.0130.07321.00
5.6.140.0200.07020.94
5.6.130.0070.08721.09
5.6.120.0100.08721.07
5.6.110.0070.08020.94
5.6.100.0100.08721.01
5.6.90.0000.09021.07
5.6.80.0030.05020.54
5.6.70.0070.06320.39
5.6.60.0100.07720.49
5.6.50.0070.07720.41
5.6.40.0100.07320.26
5.6.30.0200.06320.39
5.6.20.0030.08020.30
5.6.10.0000.07720.43
5.6.00.0030.07320.36
5.5.370.0100.07720.44
5.5.360.0170.07320.32
5.5.350.0130.06020.41
5.5.340.0030.06020.73
5.5.330.0100.05320.64
5.5.320.0030.08020.61
5.5.310.0070.07320.89
5.5.300.0070.07720.83
5.5.290.0130.07320.86
5.5.280.0030.09020.85
5.5.270.0070.07720.87
5.5.260.0100.08320.90
5.5.250.0030.08320.44
5.5.240.0030.04320.22
5.5.230.0130.07720.20
5.5.220.0100.06720.14
5.5.210.0070.04320.01
5.5.200.0200.06320.25
5.5.190.0030.08320.21
5.5.180.0230.06320.14
5.5.160.0100.08020.14
5.5.150.0000.08720.16
5.5.140.0070.07720.20
5.5.130.0170.07020.22
5.5.120.0030.08020.27
5.5.110.0100.07720.21
5.5.100.0200.06720.13
5.5.90.0030.07320.10
5.5.80.0030.05320.05
5.5.70.0170.07019.99
5.5.60.0130.07320.15
5.5.50.0030.07720.15
5.5.40.0070.07319.99
5.5.30.0130.06320.09
5.5.20.0100.07320.13
5.5.10.0230.06719.98
5.5.00.0070.05719.98
5.4.450.0030.08019.45
5.4.440.0070.06019.30
5.4.430.0070.04319.22
5.4.420.0000.08719.29
5.4.410.0130.06719.42
5.4.400.0070.06019.04
5.4.390.0130.06019.07
5.4.380.0070.06718.98
5.4.370.0030.08318.78
5.4.360.0070.07719.14
5.4.350.0170.06319.04
5.4.340.0100.07319.07
5.4.320.0100.07318.80
5.4.310.0070.04719.13
5.4.300.0000.08019.11
5.4.290.0100.07718.97
5.4.280.0030.07718.80
5.4.270.0000.08018.79
5.4.260.0000.09018.85
5.4.250.0130.06318.80
5.4.240.0100.07719.22
5.4.230.0130.06719.04
5.4.220.0070.07719.22
5.4.210.0000.08018.89
5.4.200.0100.07018.88
5.4.190.0100.08019.11
5.4.180.0070.07319.02
5.4.170.0100.08019.08
5.4.160.0030.07719.07
5.4.150.0100.04719.23
5.4.140.0130.06716.33
5.4.130.0130.06716.32
5.4.120.0170.06316.28
5.4.110.0030.04316.41
5.4.100.0130.06016.31
5.4.90.0170.06016.36
5.4.80.0030.04716.20
5.4.70.0100.06316.25
5.4.60.0070.07316.33
5.4.50.0030.07716.39
5.4.40.0030.08016.40
5.4.30.0030.06316.23
5.4.20.0100.06316.41
5.4.10.0030.07316.34
5.4.00.0130.06015.57
5.3.290.0070.07314.60
5.3.280.0130.06714.43
5.3.270.0170.06714.58
5.3.260.0030.04714.59
5.3.250.0070.07714.59
5.3.240.0070.06714.58
5.3.230.0070.05314.58
5.3.220.0000.08014.40
5.3.210.0030.05314.38
5.3.200.0070.04714.57
5.3.190.0030.05714.55
5.3.180.0030.08314.57
5.3.170.0000.08014.57
5.3.160.0070.08014.42
5.3.150.0070.06014.54
5.3.140.0030.07714.39
5.3.130.0100.07714.50
5.3.120.0070.08014.54
5.3.110.0000.05714.37
5.3.100.0030.07714.04
5.3.90.0070.06313.85
5.3.80.0100.07014.00
5.3.70.0100.07013.96
5.3.60.0000.05714.02
5.3.50.0070.04013.91
5.3.40.0000.08013.89
5.3.30.0030.06713.82
5.3.20.0070.04713.62
5.3.10.0030.05013.65
5.3.00.0030.05313.63
5.2.170.0070.03313.62
5.2.160.0100.03713.62
5.2.150.0030.05313.62
5.2.140.0070.05313.62
5.2.130.0000.04713.62
5.2.120.0100.05013.62
5.2.110.0070.03713.62
5.2.100.0100.03313.62
5.2.90.0030.06313.62
5.2.80.0100.04013.62
5.2.70.0000.03313.62
5.2.60.0070.05313.62
5.2.50.0000.05313.62
5.2.40.0070.03713.62
5.2.30.0100.03013.62
5.2.20.0070.06013.62
5.2.10.0070.05713.62
5.2.00.0030.04713.62
5.1.60.0000.04013.62
5.1.50.0100.04313.62
5.1.40.0070.05013.62
5.1.30.0100.03713.62
5.1.20.0100.05713.62
5.1.10.0070.03713.62
5.1.00.0070.05313.62
5.0.50.0000.02313.62
5.0.40.0030.01713.62
5.0.30.0030.03013.62
5.0.20.0000.03013.62
5.0.10.0000.02313.62
5.0.00.0000.03013.62
4.4.90.0000.01713.62
4.4.80.0030.02713.62
4.4.70.0000.03713.62
4.4.60.0030.03313.62
4.4.50.0030.03013.62
4.4.40.0070.02713.62
4.4.30.0000.03713.62
4.4.20.0000.03713.62
4.4.10.0000.03313.62
4.4.00.0000.03013.62
4.3.110.0030.01313.62
4.3.100.0000.01713.62
4.3.90.0000.02013.62
4.3.80.0070.02313.60
4.3.70.0030.02013.60
4.3.60.0000.01713.60
4.3.50.0000.01713.60
4.3.40.0030.02313.60
4.3.30.0000.01713.60
4.3.20.0000.01713.60
4.3.10.0000.01713.60
4.3.00.0000.01313.60

preferences:
52.87 ms | 401 KiB | 5 Q