3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = array('a' => 'a1', 'b'=>'b2', 'c'=> 'b3', 'd4'); var_dump(key($array));

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)
8.3.60.0140.00018.55
8.3.50.0100.01021.88
8.3.40.0070.01118.59
8.3.30.0120.00618.98
8.3.20.0000.00720.07
8.3.10.0040.00423.66
8.3.00.0030.00619.25
8.2.180.0090.00916.75
8.2.170.0090.00622.96
8.2.160.0040.01120.38
8.2.150.0000.00824.18
8.2.140.0050.00324.66
8.2.130.0040.00426.16
8.2.120.0050.00222.20
8.2.110.0030.00621.18
8.2.100.0060.00617.65
8.2.90.0040.00417.63
8.2.80.0040.00417.97
8.2.70.0030.00517.93
8.2.60.0050.00317.91
8.2.50.0040.00418.10
8.2.40.0030.00622.21
8.2.30.0040.00417.98
8.2.20.0000.00817.60
8.2.10.0000.00818.03
8.2.00.0070.00017.57
8.1.280.0110.00425.92
8.1.270.0060.00324.04
8.1.260.0050.00326.35
8.1.250.0070.00028.09
8.1.240.0060.00322.53
8.1.230.0070.00419.21
8.1.220.0030.00617.74
8.1.210.0040.00418.77
8.1.200.0000.00817.25
8.1.190.0000.00817.23
8.1.180.0000.00718.10
8.1.170.0050.00518.59
8.1.160.0030.00321.98
8.1.150.0000.00818.52
8.1.140.0040.00417.27
8.1.130.0000.00717.74
8.1.120.0000.00817.32
8.1.110.0000.00717.33
8.1.100.0070.00017.38
8.1.90.0030.00517.25
8.1.80.0070.00017.29
8.1.70.0070.00017.32
8.1.60.0000.01117.54
8.1.50.0080.00017.38
8.1.40.0000.00717.37
8.1.30.0000.00817.43
8.1.20.0000.00717.46
8.1.10.0040.00417.33
8.1.00.0000.00717.26
8.0.300.0040.00421.26
8.0.290.0000.00716.58
8.0.280.0030.00318.28
8.0.270.0000.00717.16
8.0.260.0000.00617.07
8.0.250.0000.00716.82
8.0.240.0070.00016.77
8.0.230.0070.00016.80
8.0.220.0000.00716.72
8.0.210.0030.00316.70
8.0.200.0000.00716.85
8.0.190.0080.00016.84
8.0.180.0040.00416.87
8.0.170.0080.00016.81
8.0.160.0040.00416.75
8.0.150.0070.00016.76
8.0.140.0040.00316.74
8.0.130.0060.00013.25
8.0.120.0000.00816.67
8.0.110.0040.00416.79
8.0.100.0000.00716.85
8.0.90.0040.00416.63
8.0.80.0030.01316.69
8.0.70.0050.00316.80
8.0.60.0050.00216.84
8.0.50.0000.00716.75
8.0.30.0060.01317.10
8.0.20.0090.01017.40
8.0.10.0040.00416.84
8.0.00.0120.00816.81
7.4.330.0000.00515.13
7.4.320.0030.00316.41
7.4.300.0030.00316.52
7.4.290.0070.00016.43
7.4.280.0000.00816.43
7.4.270.0000.00716.53
7.4.260.0080.00016.50
7.4.250.0070.00016.51
7.4.240.0070.00016.48
7.4.230.0030.00316.59
7.4.220.0110.00716.43
7.4.210.0110.00716.52
7.4.200.0000.00716.43
7.4.190.0000.00816.70
7.4.160.0030.01316.43
7.4.150.0090.00917.40
7.4.140.0130.00417.86
7.4.130.0100.01016.37
7.4.120.0110.00616.32
7.4.110.0100.00616.22
7.4.100.0090.00916.35
7.4.90.0060.01216.44
7.4.80.0030.01819.39
7.4.70.0090.00616.20
7.4.60.0070.01116.37
7.4.50.0080.00016.06
7.4.40.0090.01216.60
7.4.30.0150.00816.36
7.4.00.0000.01415.06
7.3.330.0030.00312.94
7.3.320.0000.00612.92
7.3.310.0030.00316.00
7.3.300.0040.00416.15
7.3.290.0100.00416.30
7.3.280.0060.01016.13
7.3.270.0060.01017.40
7.3.260.0210.00316.37
7.3.250.0150.00516.19
7.3.240.0060.01216.01
7.3.230.0120.00316.48
7.3.210.0080.00816.05
7.3.200.0090.01219.39
7.3.190.0000.02116.30
7.3.180.0140.00316.03
7.3.170.0090.00616.27
7.3.160.0140.00316.26
7.3.120.0070.00714.66
7.2.330.0060.01516.21
7.2.320.0100.00916.57
7.2.310.0060.00916.14
7.2.300.0040.01216.34
7.2.290.0130.00616.41
7.2.60.0060.00616.84
7.2.00.0070.00719.24
7.1.200.0060.00615.67
7.1.100.0040.00717.84
7.1.70.0000.00917.06
7.1.60.0060.01619.46
7.1.50.0120.00916.89
7.1.00.0030.07722.33
7.0.200.0040.00416.79
7.0.140.0130.06022.01
7.0.60.0130.07719.92
7.0.50.0100.07317.86
7.0.40.0030.04320.40
7.0.30.0270.07720.00
7.0.20.0170.04720.16
7.0.10.0030.04720.09
7.0.00.0030.08720.16
5.6.280.0100.06721.09
5.6.210.0100.07720.55
5.6.200.0070.07018.12
5.6.190.0100.08320.39
5.6.180.0570.06720.46
5.6.170.0230.07320.47
5.6.160.0130.07020.40
5.6.150.0100.08018.19
5.6.140.0130.07318.17
5.6.130.0100.03718.16
5.6.120.0100.04721.11
5.6.110.0200.06020.98
5.6.100.0100.03320.95
5.6.90.0200.07721.07
5.6.80.0100.07320.52
5.5.350.0070.08320.30
5.5.340.0030.08017.91
5.5.330.0100.08020.40
5.5.320.0430.06720.51
5.5.310.0300.07020.30
5.5.300.0030.05318.02
5.5.290.0100.03318.01
5.5.280.0130.03720.97
5.5.270.0100.08320.75
5.5.260.0070.07320.79
5.5.250.0130.09320.68
5.5.240.0030.07020.36
5.4.450.3300.03719.25
5.4.440.4230.04019.36
5.4.430.4330.04019.43
5.4.420.3130.04019.25
5.4.410.3570.04319.23
5.4.400.3370.03719.11
5.4.390.1430.03319.21
5.4.380.3600.02719.11
5.4.370.3770.04019.25
5.4.360.3500.03318.81
5.4.350.3470.03718.91
5.4.340.3630.04019.25
5.4.320.4130.03019.13
5.4.310.3700.04019.15
5.4.300.3800.03719.06
5.4.290.4000.03719.25
5.4.280.3670.03019.15
5.4.270.4600.04718.93
5.4.260.3600.04318.80
5.4.250.3870.03718.91
5.4.240.3630.03719.12
5.4.230.3830.03318.95
5.4.220.3970.04019.08
5.4.210.3700.03719.09
5.4.200.4030.03719.21
5.4.190.3430.03719.11
5.4.180.3530.04019.24
5.4.170.3600.03719.06
5.4.160.3530.03319.06
5.4.150.3600.04319.07
5.4.140.3530.04016.16
5.4.130.3930.03316.27
5.4.120.3530.04016.15
5.4.110.3930.04016.21
5.4.100.3730.04016.38
5.4.90.3970.02716.22
5.4.80.3630.03316.37
5.4.70.3500.03716.21
5.4.60.3500.04016.36
5.4.50.3930.03316.04
5.4.40.3900.03316.31
5.4.30.3800.03716.36
5.4.20.3530.03716.38
5.4.10.4530.03016.05
5.4.00.3770.04015.99
5.3.290.3870.04014.61
5.3.280.3700.04014.52
5.3.270.3930.05014.45
5.3.260.3430.04014.56
5.3.250.3700.03714.45
5.3.240.3800.03714.44
5.3.230.3600.04014.50
5.3.220.3970.04014.46
5.3.210.3870.03714.59
5.3.200.3700.03714.39
5.3.190.4030.04014.41
5.3.180.3470.04014.60
5.3.170.3770.04014.40
5.3.160.3800.03014.51
5.3.150.3530.03714.52
5.3.140.3930.03714.39
5.3.130.3430.04014.50
5.3.120.4570.03714.39
5.3.110.3670.04014.63
5.3.100.3300.03313.98
5.3.90.3770.03713.87
5.3.80.3600.03713.85
5.3.70.3170.03313.89
5.3.60.3930.04013.80
5.3.50.3570.03713.80
5.3.40.4330.03313.89
5.3.30.3830.03713.81
5.3.20.3770.03313.59
5.3.10.3800.04313.64
5.3.00.3500.03013.56
5.2.170.3170.03311.08
5.2.160.3170.02711.30
5.2.150.2870.03311.16
5.2.140.3200.03011.16
5.2.130.3200.02711.15
5.2.120.3170.03310.96
5.2.110.3400.02011.01
5.2.100.2900.03010.97
5.2.90.3200.03311.03
5.2.80.3170.03010.96
5.2.70.2730.03011.18
5.2.60.3130.02711.05
5.2.50.3170.02711.06
5.2.40.2370.02310.93
5.2.30.2270.03010.97
5.2.20.2570.03010.84
5.2.10.1800.03010.76
5.2.00.2230.03310.61
5.1.60.1400.02310.05
5.1.50.1700.02310.15
5.1.40.1330.02710.05
5.1.30.1870.02710.25
5.1.20.1800.02310.39
5.1.10.2270.02710.05
5.1.00.2300.02310.23
5.0.50.0970.02010.05
5.0.40.1170.02010.05
5.0.30.1030.03010.05
5.0.20.1200.01710.05
5.0.10.1230.01710.05
5.0.00.1400.02710.05
4.4.90.1370.01010.05
4.4.80.1500.01310.05
4.4.70.0770.02010.05
4.4.60.0930.01010.05
4.4.50.0700.01710.05
4.4.40.0730.02010.05
4.4.30.0900.01710.05
4.4.20.0830.01010.05
4.4.10.1130.01310.05
4.4.00.1100.03010.05
4.3.110.1170.01710.05
4.3.100.1270.01310.05
4.3.90.1230.01010.05
4.3.80.1230.02010.05
4.3.70.1330.01710.05
4.3.60.1000.01310.05
4.3.50.1200.01310.05
4.3.40.0900.02310.05
4.3.30.0470.01310.05
4.3.20.0570.01710.05
4.3.10.0830.02010.05
4.3.00.0900.02310.05

preferences:
34.8 ms | 401 KiB | 5 Q