3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array("one" => 1, "two" => 2); $firstKey = array_keys($a)[0]; 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)
8.3.60.0030.01316.13
8.3.50.0080.00821.92
8.3.40.0110.00418.79
8.3.30.0030.01019.22
8.3.20.0030.00720.31
8.3.10.0080.00023.53
8.3.00.0080.00019.66
8.2.180.0060.00916.50
8.2.170.0070.01022.96
8.2.160.0130.00320.35
8.2.150.0070.00024.18
8.2.140.0030.00624.66
8.2.130.0040.00426.16
8.2.120.0040.00421.07
8.2.110.0160.00022.20
8.2.100.0100.00717.59
8.2.90.0080.00019.41
8.2.80.0060.00317.97
8.2.70.0000.01017.63
8.2.60.0090.00518.03
8.2.50.0030.00618.07
8.2.40.0030.00518.34
8.2.30.0000.00718.35
8.2.20.0000.00717.78
8.2.10.0040.00418.18
8.2.00.0070.00017.66
8.1.280.0080.00825.92
8.1.270.0080.00023.82
8.1.260.0040.00426.35
8.1.250.0040.00428.09
8.1.240.0000.00923.82
8.1.230.0030.00718.97
8.1.220.0000.00817.74
8.1.210.0000.00818.77
8.1.200.0040.00417.25
8.1.190.0000.00817.25
8.1.180.0040.00418.10
8.1.170.0030.00518.32
8.1.160.0040.00421.82
8.1.150.0050.00218.82
8.1.140.0000.00717.26
8.1.130.0000.00717.72
8.1.120.0040.00417.36
8.1.110.0040.00417.39
8.1.100.0000.00817.35
8.1.90.0000.00817.30
8.1.80.0050.00217.30
8.1.70.0050.00317.29
8.1.60.0040.00417.53
8.1.50.0030.00517.34
8.1.40.0000.00717.34
8.1.30.0030.00517.49
8.1.20.0030.00517.41
8.1.10.0040.00417.45
8.1.00.0000.00717.57
8.0.300.0050.00318.77
8.0.290.0040.00416.63
8.0.280.0000.00718.33
8.0.270.0000.00717.19
8.0.260.0060.00017.21
8.0.250.0000.00616.92
8.0.240.0030.00316.95
8.0.230.0040.00416.88
8.0.220.0070.00016.87
8.0.210.0000.00716.91
8.0.200.0030.00316.85
8.0.190.0000.00716.94
8.0.180.0070.00416.80
8.0.170.0030.00616.95
8.0.160.0000.00716.82
8.0.150.0080.00016.86
8.0.140.0070.00016.73
8.0.130.0030.00313.36
8.0.120.0030.00616.75
8.0.110.0000.00716.81
8.0.100.0000.00717.01
8.0.90.0000.00716.88
8.0.80.0100.01016.80
8.0.70.0070.00016.76
8.0.60.0030.00316.71
8.0.50.0040.00416.88
8.0.30.0110.01317.14
8.0.20.0120.00717.40
8.0.10.0000.00716.97
8.0.00.0060.01416.79
7.4.330.0050.00015.00
7.4.320.0030.00316.45
7.4.300.0000.00616.44
7.4.290.0030.00316.37
7.4.280.0040.00416.44
7.4.270.0030.00316.52
7.4.260.0050.00516.49
7.4.250.0050.00316.49
7.4.240.0000.00716.43
7.4.230.0070.00016.50
7.4.220.0070.01116.58
7.4.210.0070.00816.57
7.4.200.0050.00216.41
7.4.160.0100.01016.31
7.4.150.0120.00917.40
7.4.140.0130.00517.86
7.4.130.0060.01116.42
7.4.120.0070.01116.40
7.4.110.0090.00616.29
7.4.100.0200.00316.43
7.4.90.0060.01216.51
7.4.80.0130.01019.39
7.4.70.0110.00516.66
7.4.60.0070.01316.53
7.4.50.0000.00816.40
7.4.40.0060.01016.70
7.4.30.0060.01116.54
7.4.00.0100.00314.91
7.3.330.0030.00313.10
7.3.320.0020.00213.17
7.3.310.0050.00216.23
7.3.300.0050.00216.31
7.3.290.0070.00716.21
7.3.280.0070.01016.29
7.3.270.0070.01117.40
7.3.260.0150.00816.45
7.3.250.0100.00716.44
7.3.240.0100.01316.36
7.3.230.0090.01016.39
7.3.210.0070.01016.36
7.3.200.0110.00719.39
7.3.190.0100.01016.58
7.3.180.0090.00616.36
7.3.170.0060.01516.27
7.3.160.0090.01216.28
7.3.120.0040.01214.54
7.2.330.0090.00916.71
7.2.320.0100.00616.46
7.2.310.0070.01016.33
7.2.300.0030.01416.82
7.2.290.0070.01016.36
7.2.00.0090.01719.53
7.1.100.0060.00618.08
7.1.70.0030.00317.08
7.1.60.0070.01319.70
7.1.50.0100.01316.93
7.1.00.0070.07322.54
7.0.200.0660.00914.94
7.0.140.0070.07021.95
7.0.70.0030.06321.66
7.0.60.0130.06021.70
7.0.50.0030.07722.13
7.0.40.0000.08320.07
7.0.30.0030.08320.16
7.0.20.0030.08320.08
7.0.10.0070.07020.08
7.0.00.0070.08320.03
5.6.280.0070.07021.11
5.6.220.0000.08320.43
5.6.210.0070.06020.54
5.6.200.0100.08021.13
5.6.190.0030.07021.09
5.6.180.0000.08021.00
5.6.170.0100.07021.00
5.6.160.0070.07020.99
5.6.150.0000.04721.00
5.6.140.0070.08321.02
5.6.130.0070.08021.04
5.6.120.0030.07321.03
5.6.110.0000.07320.99
5.6.100.0000.07321.04
5.6.90.0070.08321.09
5.6.80.0030.07320.45
5.6.70.0100.07720.36
5.6.60.0100.06020.28
5.6.50.0030.08720.45
5.6.40.0070.07320.47
5.6.30.0070.04020.45
5.6.20.0030.05020.29
5.6.10.0030.03720.34
5.6.00.0000.04320.41
5.5.360.0000.08020.29
5.5.350.0000.07720.38
5.5.340.0000.08020.86
5.5.330.0070.08020.85
5.5.320.0130.07020.89
5.5.310.0070.07720.73
5.5.300.0000.08020.79
5.5.290.0030.07320.81
5.5.280.0030.04720.86
5.5.270.0100.08020.88
5.5.260.0030.07020.61
5.5.250.0000.09020.43
5.5.240.0000.08020.30
5.5.230.0030.07720.20
5.5.220.0000.08320.19
5.5.210.0070.08320.19
5.5.200.0030.08320.22
5.5.190.0030.04320.20
5.5.180.0000.05020.09
5.5.160.0070.05020.16
5.5.150.0100.03320.07
5.5.140.0070.07020.05
5.5.130.0030.08320.08
5.5.120.0030.07719.97
5.5.110.0070.08020.20
5.5.100.0000.08020.06
5.5.90.0000.08020.05
5.5.80.0070.07019.95
5.5.70.0070.07720.04
5.5.60.0070.05320.08
5.5.50.0070.06020.07
5.5.40.0030.07719.94
5.5.30.0000.07320.05
5.5.20.0100.06020.05
5.5.10.0030.08019.95
5.5.00.0130.06319.98
5.4.450.0000.07719.38
5.4.440.0030.07719.43
5.4.430.0000.08319.21
5.4.420.0030.07719.27
5.4.410.0030.07019.21
5.4.400.0170.05319.06
5.4.390.0030.07718.95
5.4.380.0030.06719.05
5.4.370.0030.07718.95
5.4.360.0030.05718.80
5.4.350.0000.07719.02
5.4.340.0000.05319.05
5.4.320.0030.04019.11
5.4.310.0000.08319.04
5.4.300.0000.05019.10
5.4.290.0000.06719.01
5.4.280.0030.04318.95
5.4.270.0070.06319.08
5.4.260.0100.07319.10
5.4.250.0000.08019.05
5.4.240.0100.06319.20
5.4.230.0030.06019.01
5.4.220.0100.06719.03
5.4.210.0070.06319.12
5.4.200.0000.07718.90
5.4.190.0070.07319.20
5.4.180.0070.07718.88
5.4.170.0100.06719.20
5.4.160.0030.07718.87
5.4.150.0030.07719.08
5.4.140.0030.06716.30
5.4.130.0030.07716.26
5.4.120.0070.07016.33
5.4.110.0030.04316.22
5.4.100.0030.07016.43
5.4.90.0070.07016.25
5.4.80.0030.07316.40
5.4.70.0100.07016.35
5.4.60.0030.04716.27
5.4.50.0000.04716.19
5.4.40.0070.04316.45
5.4.30.0000.03716.38
5.4.20.0000.03716.17
5.4.10.0000.03716.22
5.4.00.0030.05015.74
5.3.290.0000.08314.86
5.3.280.0030.07314.86
5.3.270.0030.07314.86
5.3.260.0030.08014.86
5.3.250.0000.07014.86
5.3.240.0070.07014.86
5.3.230.0070.06314.86
5.3.220.0070.07714.86
5.3.210.0030.05714.86
5.3.200.0030.07714.86
5.3.190.0000.07014.86
5.3.180.0030.07014.86
5.3.170.0000.08014.86
5.3.160.0030.04714.86
5.3.150.0030.06014.86
5.3.140.0000.08014.86
5.3.130.0000.04314.86
5.3.120.0130.03014.86
5.3.110.0100.04714.86
5.3.100.0070.05714.86
5.3.90.0000.06314.86
5.3.80.0030.05714.86
5.3.70.0000.05314.86
5.3.60.0070.07014.86
5.3.50.0100.07314.86
5.3.40.0000.07014.86
5.3.30.0070.06314.86
5.3.20.0030.07014.86
5.3.10.0130.06314.86
5.3.00.0100.05314.86
5.2.170.0000.04714.86
5.2.160.0030.03714.86
5.2.150.0030.06314.86
5.2.140.0030.05714.86
5.2.130.0000.05014.86
5.2.120.0000.06314.86
5.2.110.0070.05714.86
5.2.100.0030.06314.86
5.2.90.0030.06014.86
5.2.80.0030.05014.86
5.2.70.0070.05014.86
5.2.60.0030.04714.86
5.2.50.0000.06014.86
5.2.40.0000.04314.86
5.2.30.0100.05714.86
5.2.20.0030.03314.86
5.2.10.0000.06014.86
5.2.00.0030.05714.86
5.1.60.0070.05014.86
5.1.50.0130.04314.86
5.1.40.0000.04314.86
5.1.30.0100.04314.86
5.1.20.0030.04314.86
5.1.10.0070.04014.86
5.1.00.0000.04014.86
5.0.50.0000.04714.86
5.0.40.0030.04714.86
5.0.30.0000.06714.86
5.0.20.0000.04314.86
5.0.10.0030.04314.86
5.0.00.0000.06014.86
4.4.90.0000.03014.86
4.4.80.0000.03714.86
4.4.70.0030.03314.86
4.4.60.0000.04014.86
4.4.50.0030.03314.86
4.4.40.0030.05314.86
4.4.30.0070.03014.86
4.4.20.0030.03314.86
4.4.10.0000.03714.86
4.4.00.0000.05014.86
4.3.110.0070.03014.86
4.3.100.0030.03314.86
4.3.90.0030.02314.86
4.3.80.0000.04714.86
4.3.70.0000.03314.86
4.3.60.0000.03314.86
4.3.50.0000.03714.86
4.3.40.0000.05314.86
4.3.30.0000.03714.86
4.3.20.0000.04014.86
4.3.10.0000.03314.86
4.3.00.0030.02714.86

preferences:
62.17 ms | 401 KiB | 5 Q