3v4l.org

run code in 300+ PHP versions simultaneously
<?php if(!function_exists("array_key_first")){ function array_key_first($array){ reset($array); return key($array); } } $array = [55 => "lol", 44 => 287]; echo array_key_first($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)
8.5.30.0130.00819.23
8.5.20.0090.00819.61
8.5.10.0120.00616.54
8.5.00.0160.01220.05
8.4.180.0130.00919.59
8.4.170.0170.00721.75
8.4.160.0130.00823.80
8.4.150.0060.00716.86
8.4.140.0140.00917.45
8.4.130.0110.00818.52
8.4.120.0100.01017.62
8.4.110.0140.00524.00
8.4.100.0150.00417.61
8.4.90.0130.00620.54
8.4.80.0070.00418.86
8.4.70.0050.00320.75
8.4.60.0070.00420.87
8.4.50.0140.00618.84
8.4.40.0090.00619.48
8.4.30.0130.00618.57
8.4.20.0060.00320.30
8.4.10.0060.00317.63
8.3.300.0080.01418.35
8.3.290.0100.01020.82
8.3.280.0110.00918.40
8.3.270.0110.01016.76
8.3.260.0120.00716.49
8.3.250.0060.00316.65
8.3.240.0120.00716.59
8.3.230.0050.00316.41
8.3.220.0090.01020.69
8.3.210.0100.00818.46
8.3.200.0060.00316.76
8.3.190.0080.01317.11
8.3.180.0130.00618.87
8.3.170.0070.01119.06
8.3.160.0140.00418.82
8.3.150.0070.01116.53
8.3.140.0080.00016.64
8.3.130.0040.00418.57
8.3.120.0030.01618.79
8.3.110.0080.00020.94
8.3.100.0060.00318.37
8.3.90.0050.00226.77
8.3.80.0060.00319.36
8.3.70.0140.00418.43
8.3.60.0140.00518.25
8.3.50.0060.00817.94
8.3.40.0040.01118.52
8.3.30.0130.00318.36
8.3.20.0070.00020.75
8.3.10.0050.00323.66
8.3.00.0000.00723.48
8.2.300.0120.00720.41
8.2.290.0080.00816.72
8.2.280.0120.00620.30
8.2.270.0090.00916.70
8.2.260.0000.01817.05
8.2.250.0030.00518.13
8.2.240.0080.00017.20
8.2.230.0030.00622.58
8.2.220.0080.00024.06
8.2.210.0110.00726.77
8.2.200.0050.00518.88
8.2.190.0150.00416.58
8.2.180.0120.00616.75
8.2.170.0040.01122.96
8.2.160.0100.00322.11
8.2.150.0040.00424.18
8.2.140.0080.00024.66
8.2.130.0000.00720.47
8.2.120.0040.00426.35
8.2.110.0070.00322.18
8.2.100.0080.00417.78
8.2.90.0120.00017.75
8.2.80.0000.00817.97
8.2.70.0030.00618.04
8.2.60.0000.00818.08
8.2.50.0030.00618.10
8.2.40.0040.00419.36
8.2.30.0070.00019.12
8.2.20.0000.00718.05
8.2.10.0070.00019.30
8.2.00.0000.00719.41
8.1.340.0080.01120.06
8.1.330.0140.00515.96
8.1.320.0090.01116.20
8.1.310.0080.00018.13
8.1.300.0040.00816.00
8.1.290.0070.00330.84
8.1.280.0090.01625.92
8.1.270.0000.00818.83
8.1.260.0000.00826.35
8.1.250.0080.00028.09
8.1.240.0080.00023.81
8.1.230.0060.00620.89
8.1.220.0040.00417.74
8.1.210.0040.00418.77
8.1.200.0090.00017.22
8.1.190.0000.00817.25
8.1.180.0030.00618.10
8.1.170.0000.00918.45
8.1.160.0030.00618.81
8.1.150.0030.00318.80
8.1.140.0040.00422.05
8.1.130.0000.00720.20
8.1.120.0070.00017.53
8.1.110.0080.00017.35
8.1.100.0050.00217.41
8.1.90.0070.00017.41
8.1.80.0030.00517.46
8.1.70.0070.00017.46
8.1.60.0030.00517.49
8.1.50.0000.00717.52
8.1.40.0000.00817.50
8.1.30.0030.00617.57
8.1.20.0000.01017.59
8.1.10.0040.00417.42
8.1.00.0040.00417.34
8.0.300.0070.00019.60
8.0.290.0030.00616.75
8.0.280.0070.00018.41
8.0.270.0030.00317.15
8.0.260.0070.00018.41
8.0.250.0070.00016.93
8.0.240.0040.00416.95
8.0.230.0000.00816.90
8.0.220.0030.00316.89
8.0.210.0030.00616.88
8.0.200.0000.00816.96
8.0.190.0040.00416.88
8.0.180.0040.00416.93
8.0.170.0040.00416.82
8.0.160.0040.00416.85
8.0.150.0060.00316.89
8.0.140.0000.00716.82
8.0.130.0030.00313.35
8.0.120.0040.00416.79
8.0.110.0000.00816.76
8.0.100.0070.00016.94
8.0.90.0070.00016.93
8.0.80.0070.01316.82
8.0.70.0040.00416.95
8.0.60.0040.00416.84
8.0.50.0000.00716.74
8.0.30.0100.00917.11
8.0.20.0080.01117.40
8.0.10.0020.00516.97
8.0.00.0130.00516.79
7.4.330.0000.00516.79
7.4.320.0030.00316.50
7.4.300.0020.00516.51
7.4.290.0030.00316.52
7.4.280.0040.00416.55
7.4.270.0030.00316.51
7.4.260.0000.00716.52
7.4.250.0000.00716.55
7.4.240.0070.00016.53
7.4.230.0040.00416.39
7.4.220.0080.00016.56
7.4.210.0070.00816.54
7.4.200.0040.00416.62
7.4.160.0080.00916.49
7.4.140.0110.00717.86
7.4.130.0120.01216.56
7.4.120.0100.01316.47
7.4.110.0140.01016.47
7.4.100.0160.00316.63
7.4.90.0090.00916.50
7.4.80.0090.01219.39
7.4.70.0140.00716.40
7.4.60.0060.01116.54
7.4.50.0080.00516.27
7.4.40.0070.01016.38
7.4.10.0060.01114.85
7.4.00.0090.00814.86
7.3.330.0000.00513.13
7.3.320.0000.00513.14
7.3.310.0070.00016.08
7.3.300.0070.00016.13
7.3.290.0000.00716.05
7.3.280.0110.00616.16
7.3.260.0100.00916.35
7.3.240.0130.00816.25
7.3.230.0100.00616.40
7.3.210.0100.00716.47
7.3.200.0090.00916.54
7.3.190.0140.00916.27
7.3.180.0060.01016.32
7.3.170.0160.00916.23
7.3.160.0070.01616.41
7.3.130.0040.01214.62
7.3.120.0080.00814.76
7.3.110.0070.01214.55
7.3.100.0040.00914.60
7.3.90.0020.01114.57
7.3.80.0050.00914.89
7.3.70.0090.00114.72
7.3.60.0100.00814.72
7.3.50.0070.00914.49
7.3.40.0060.00814.74
7.3.30.0100.00314.67
7.3.20.0060.01016.40
7.3.10.0030.00616.51
7.3.00.0300.00416.11
7.2.330.0120.00616.65
7.2.320.0110.00616.55
7.2.310.0150.00316.69
7.2.300.0060.01016.54
7.2.290.0160.00816.23
7.2.260.0090.00914.81
7.2.250.0080.01014.87
7.2.240.0070.00914.95
7.2.230.0070.01014.82
7.2.220.0090.00615.15
7.2.210.0050.00815.08
7.2.200.0070.00614.96
7.2.190.0070.00714.84
7.2.180.0050.01014.94
7.2.170.0080.00415.01
7.2.160.0080.00314.92
7.2.150.0060.00916.88
7.2.140.0000.01216.68
7.2.130.0400.00816.06
7.2.120.0250.01116.13
7.2.110.0250.00916.06
7.2.100.0230.01016.07
7.2.90.0220.00916.10
7.2.80.0320.01016.14
7.2.70.0270.00716.12
7.2.60.0220.00816.06
7.2.50.0220.01216.20
7.2.40.0260.00716.14
7.2.30.0250.00616.13
7.2.20.0220.01116.16
7.2.10.0420.00916.10
7.2.00.0680.00916.13
7.1.330.0030.01215.78
7.1.320.0020.01215.71
7.1.310.0050.00715.92
7.1.300.0050.01015.82
7.1.290.0020.00915.61
7.1.280.0080.00615.62
7.1.270.0050.00715.73
7.1.260.0030.01015.75
7.1.250.0290.00915.03
7.1.240.0000.01715.77
7.1.230.0100.00615.63
7.1.220.0080.00815.55
7.1.210.0060.00615.74
7.1.200.0000.01515.71
7.1.190.0070.00315.77
7.1.180.0030.00915.47
7.1.170.0130.00315.76
7.1.160.0040.01115.78
7.1.150.0090.00615.57
7.1.140.0040.01215.88
7.1.130.0080.00815.80
7.1.120.0070.00715.88
7.1.110.0070.01115.67
7.1.100.0030.01415.50
7.1.90.0040.00815.89
7.1.80.0000.01315.76
7.1.70.0030.00715.59
7.1.60.0090.00615.94
7.1.50.0080.00815.73
7.1.40.0070.01115.75
7.1.30.0150.00315.86
7.1.20.0040.00815.81
7.1.10.0100.00715.60
7.1.00.0030.00715.71
7.0.330.0280.00714.71
7.0.320.0040.00415.45
7.0.310.0080.00415.06
7.0.300.0070.00715.37
7.0.290.0080.00815.40
7.0.280.0090.00615.29
7.0.270.0060.00615.35
7.0.260.0030.01315.40
7.0.250.0060.00315.16
7.0.240.0080.00415.50
7.0.230.0100.00315.39
7.0.220.0050.00515.24
7.0.210.0030.01015.10
7.0.200.0000.01615.55
7.0.190.0080.00415.52
7.0.180.0040.01215.27
7.0.170.0060.00915.51
7.0.160.0100.00315.30
7.0.150.0120.00315.21
7.0.140.0040.00915.29
7.0.130.0060.00915.53
7.0.120.0120.00315.49
7.0.110.0030.01215.39
7.0.100.0070.00715.49
7.0.90.0100.00315.39
7.0.80.0100.00315.23
7.0.70.0070.00715.25
7.0.60.0040.00715.52
7.0.50.0070.00715.32
7.0.40.0060.01013.50
7.0.30.0000.01213.43
7.0.20.0060.00613.34
7.0.10.0000.01413.57
7.0.00.0050.00513.45
5.6.400.0090.00314.04
5.6.390.0070.00414.33
5.6.380.0100.00514.38
5.6.370.0110.00313.95
5.6.360.0000.01514.56
5.6.350.0040.00814.49
5.6.340.0070.01014.18
5.6.330.0040.01114.25
5.6.320.0070.01114.67
5.6.310.0060.00614.25
5.6.300.0100.00314.49
5.6.290.0070.00414.57
5.6.280.0070.01014.48
5.6.270.0030.01314.44
5.6.260.0040.01114.34
5.6.250.0070.00714.38
5.6.240.0070.01014.48
5.6.230.0040.01114.46
5.6.220.0000.00914.14
5.6.210.0030.01314.25
5.6.200.0060.00914.31
5.6.190.0070.00714.22
5.6.180.0070.00414.19
5.6.170.0030.00614.36
5.6.160.0070.00414.24
5.6.150.0030.01014.47
5.6.140.0070.00714.34
5.6.130.0070.00714.34
5.6.120.0030.00714.25
5.6.110.0000.00914.35
5.6.100.0070.00714.23
5.6.90.0070.00714.18
5.6.80.0030.00914.27
5.6.70.0090.00314.34
5.6.60.0040.00914.24
5.6.50.0100.00014.10
5.6.40.0040.00814.09
5.6.30.0060.00614.27
5.6.20.0080.00414.33
5.6.10.0070.00714.09
5.6.00.0000.01414.20

preferences:
48.62 ms | 1911 KiB | 5 Q