3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = array( 'foo' => 2, 'baz' => 3, 'bar' => 4, 'jim' => 2, ); function unique($input) { $output = array(); foreach ($input as $key => $val) { if (!in_array($val, $output)) { $output[$key] = $val; } } return $output; } function unique_better($input) { $output = array(); $unique_values = array(); foreach ($input as $key => $val) { $unique_values[$val] = true; if ( ! isset( $unique_values[$val] ) ) { $unique_values[$val] = true; $output[$key] = $val; } } return $output; } var_dump(unique($array)); var_dump(unique_better($array)); var_dump(array_flip(array_flip($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)
8.3.60.0040.01116.63
8.3.50.0100.00821.95
8.3.40.0100.01018.71
8.3.30.0140.00719.22
8.3.20.0070.00020.23
8.3.10.0070.00023.56
8.3.00.0060.00317.71
8.2.180.0120.00318.29
8.2.170.0140.00722.96
8.2.160.0100.00320.53
8.2.150.0040.00424.18
8.2.140.0080.00024.66
8.2.130.0090.00926.16
8.2.120.0040.00422.25
8.2.110.0030.00620.35
8.2.100.0090.00317.72
8.2.90.0060.00317.84
8.2.80.0050.00319.35
8.2.70.0060.00317.63
8.2.60.0060.00318.03
8.2.50.0080.00018.07
8.2.40.0040.00419.91
8.2.30.0050.00218.11
8.2.20.0040.00417.57
8.2.10.0050.00218.01
8.2.00.0000.01117.64
8.1.280.0080.00825.92
8.1.270.0000.00823.91
8.1.260.0040.00426.35
8.1.250.0070.00328.09
8.1.240.0060.00322.40
8.1.230.0070.00420.89
8.1.220.0040.00417.79
8.1.210.0060.00318.97
8.1.200.0090.00017.35
8.1.190.0040.00417.13
8.1.180.0040.00418.10
8.1.170.0020.00518.94
8.1.160.0080.00018.90
8.1.150.0030.00518.70
8.1.140.0000.00717.38
8.1.130.0000.00717.79
8.1.120.0030.00317.54
8.1.110.0000.01017.37
8.1.100.0070.00317.52
8.1.90.0000.00717.41
8.1.80.0040.00417.45
8.1.70.0030.00317.44
8.1.60.0030.00617.64
8.1.50.0000.00817.53
8.1.40.0040.00417.51
8.1.30.0000.00817.63
8.1.20.0000.00717.63
8.1.10.0030.00617.50
8.1.00.0000.00817.45
8.0.300.0040.00419.94
8.0.290.0050.00216.75
8.0.280.0030.00318.42
8.0.270.0040.00417.97
8.0.260.0030.00317.26
8.0.250.0030.00316.97
8.0.240.0030.00316.86
8.0.230.0030.00316.93
8.0.220.0050.00216.96
8.0.210.0070.00016.81
8.0.200.0000.00716.86
8.0.190.0050.00316.97
8.0.180.0000.01016.94
8.0.170.0040.00416.94
8.0.160.0070.00016.79
8.0.150.0040.00416.91
8.0.140.0030.00316.77
8.0.130.0030.00313.40
8.0.120.0000.00716.84
8.0.110.0000.00716.90
8.0.100.0000.00716.84
8.0.90.0000.00717.02
8.0.80.0070.00716.95
8.0.70.0040.00416.78
8.0.60.0050.00216.93
8.0.50.0040.00416.80
8.0.30.0100.01017.15
8.0.20.0090.01017.40
8.0.10.0000.00716.98
8.0.00.0100.00816.83
7.4.330.0000.00515.04
7.4.320.0060.00016.52
7.4.300.0030.00316.63
7.4.290.0070.00016.53
7.4.280.0040.00416.49
7.4.270.0030.00316.41
7.4.260.0000.00716.57
7.4.250.0090.00016.63
7.4.240.0030.00316.55
7.4.230.0000.00716.51
7.4.220.0130.00316.66
7.4.210.0070.00716.65
7.4.200.0050.00216.59
7.4.190.0050.00316.68
7.4.160.0080.00816.36
7.4.150.0090.00917.40
7.4.140.0080.00917.86
7.4.130.0070.01216.58
7.4.120.0060.01216.44
7.4.110.0090.00916.59
7.4.100.0130.01016.52
7.4.90.0130.00416.48
7.4.80.0070.01019.39
7.4.70.0090.00916.46
7.4.60.0060.01016.45
7.4.50.0040.00416.42
7.4.40.0140.00022.77
7.4.30.0060.00916.47
7.4.00.0050.01215.01
7.3.330.0060.00013.39
7.3.320.0000.00513.39
7.3.310.0040.00416.48
7.3.300.0030.00316.25
7.3.290.0090.00616.36
7.3.280.0070.00916.39
7.3.270.0090.00917.40
7.3.260.0090.01116.43
7.3.250.0120.00516.57
7.3.240.0030.01316.66
7.3.230.0070.01016.57
7.3.210.0090.00916.29
7.3.200.0070.01419.39
7.3.190.0060.01216.55
7.3.180.0080.00816.33
7.3.170.0160.00016.51
7.3.160.0100.00716.48
7.3.120.0070.00314.91
7.3.10.0040.00716.79
7.3.00.0100.00016.86
7.2.330.0130.01316.86
7.2.320.0080.00916.61
7.2.310.0080.00816.68
7.2.300.0120.00616.67
7.2.290.0060.01016.46
7.2.130.0080.00316.63
7.2.120.0030.00916.99
7.2.110.0040.00816.62
7.2.100.0090.00317.02
7.2.90.0000.01016.93
7.2.80.0030.01016.79
7.2.70.0040.00916.89
7.2.60.0050.00917.06
7.2.50.0070.01016.98
7.2.40.0070.01117.10
7.2.30.0030.00617.14
7.2.20.0030.00916.87
7.2.10.0000.00817.03
7.2.00.0020.01018.12
7.1.250.0030.00515.85
7.1.200.0040.00815.64
7.1.100.0040.00418.33
7.1.70.0000.00717.03
7.1.60.0140.01019.46
7.1.50.0090.01216.96
7.1.00.0100.07022.36
7.0.200.0000.00816.66
7.0.140.0000.07322.04
7.0.60.0070.08019.91
7.0.50.0030.08017.87
7.0.40.0100.07020.23
7.0.30.0430.07020.20
7.0.20.0200.05720.22
7.0.10.0100.05320.25
7.0.00.0070.08720.06
5.6.280.0000.07720.78
5.6.210.0030.04020.77
5.6.200.0030.07718.14
5.6.190.0030.04720.62
5.6.180.0230.03720.77
5.6.170.0330.07020.62
5.6.160.0100.05720.45
5.6.150.0070.03718.15
5.6.140.0000.06018.18
5.6.130.0070.08018.28
5.6.120.0070.04021.13
5.6.110.0130.07721.13
5.6.100.0100.06021.00
5.6.90.0070.08721.11
5.6.80.0070.08020.40
5.6.70.4270.03720.44
5.5.350.0130.07720.47
5.5.340.0100.04718.07
5.5.330.0070.04320.27
5.5.320.0270.07020.33
5.5.310.0130.04320.25
5.5.300.0030.04017.95
5.5.290.0030.08318.03
5.5.280.0070.08020.88
5.5.270.0030.08320.80
5.5.260.0100.03320.96
5.5.250.0130.07720.70
5.5.240.0300.06720.35
5.4.450.0130.06019.39
5.4.440.0530.06019.55
5.4.430.0170.05319.46
5.4.420.0100.05319.46
5.4.410.0300.05719.35
5.4.400.0200.06019.22
5.4.390.0470.04718.83
5.4.380.0270.06018.81
5.4.370.0330.05718.78
5.4.360.0270.06318.86
5.4.350.0270.05718.76
5.4.340.0270.06318.73
5.4.320.0060.04212.50
5.4.310.0080.04012.50
5.4.300.0040.03912.50
5.4.290.0110.03812.49
5.4.280.0080.03812.38
5.4.270.0100.04812.39
5.4.260.0110.05112.39
5.4.250.0110.04712.39
5.4.240.0060.04212.38
5.4.230.0070.04012.38
5.4.220.0060.03812.38
5.4.210.0070.03712.38
5.4.200.0060.04312.38
5.4.190.0070.04412.37
5.4.180.0070.03812.38
5.4.170.0070.04212.38
5.4.160.0050.03712.38
5.4.150.0070.03712.37
5.4.140.0030.04112.06
5.4.130.0060.03612.05
5.4.120.0080.03512.01
5.4.110.0090.03412.00
5.4.100.0040.03912.00
5.4.90.0100.04112.00
5.4.80.0070.05812.00
5.4.70.0060.04912.00
5.4.60.0120.04711.99
5.4.50.0130.04712.00
5.4.40.0120.04511.98
5.4.30.0090.04411.98
5.4.20.0100.04911.98
5.4.10.0080.03811.98
5.4.00.0050.03811.47
5.3.290.0040.04212.80
5.3.280.0080.04912.71
5.3.270.0150.05712.72
5.3.260.0100.04312.72
5.3.250.0060.04312.72
5.3.240.0060.04012.71
5.3.230.0100.06212.71
5.3.220.0090.03812.68
5.3.210.0050.04112.68
5.3.200.0080.03512.68
5.3.190.0100.03512.68
5.3.180.0100.03412.67
5.3.170.0070.03712.67
5.3.160.0080.03812.67
5.3.150.0150.07312.67
5.3.140.0110.04112.66
5.3.130.0070.04412.66
5.3.120.0130.04712.66
5.3.110.0120.06912.66
5.3.100.0100.04812.13
5.3.90.0150.05012.11
5.3.80.0120.04712.10
5.3.70.0080.04512.10
5.3.60.0050.05412.09
5.3.50.0120.05712.03
5.3.40.0080.04612.03
5.3.30.0120.03711.99
5.3.20.0060.03811.77
5.3.10.0080.03511.74
5.3.00.0080.03911.72
5.2.170.0080.0299.23
5.2.160.0080.0299.22
5.2.150.0100.0289.22
5.2.140.0090.0359.22
5.2.130.0080.0339.18
5.2.120.0060.0289.18
5.2.110.0050.0329.19
5.2.100.0120.0369.18
5.2.90.0070.0319.18
5.2.80.0080.0279.18
5.2.70.0070.0299.18
5.2.60.0030.0339.14
5.2.50.0050.0309.11
5.2.40.0060.0289.07
5.2.30.0070.0349.05
5.2.20.0040.0339.04
5.2.10.0060.0398.95
5.2.00.0070.0358.81
5.1.60.0080.0338.09
5.1.50.0090.0328.09
5.1.40.0040.0388.07
5.1.30.0060.0298.42
5.1.20.0110.0228.45
5.1.10.0060.0358.17
5.1.00.0070.0328.17
5.0.50.0070.0206.64
5.0.40.0030.0236.51
5.0.30.0060.0356.32
5.0.20.0070.0176.29
5.0.10.0050.0196.27
5.0.00.0050.0296.26
4.4.90.0030.0174.78
4.4.80.0030.0154.75
4.4.70.0020.0174.75
4.4.60.0040.0164.75
4.4.50.0030.0214.77
4.4.40.0040.0274.71
4.4.30.0050.0154.76
4.4.20.0060.0184.85
4.4.10.0020.0204.85
4.4.00.0050.0274.76
4.3.110.0040.0174.67
4.3.100.0050.0164.66
4.3.90.0000.0184.63
4.3.80.0070.0264.59
4.3.70.0040.0204.63
4.3.60.0040.0224.63
4.3.50.0030.0224.63
4.3.40.0070.0234.54
4.3.30.0020.0173.31
4.3.20.0030.0163.29
4.3.10.0010.0173.25
4.3.00.0130.03310.31

preferences:
54.19 ms | 401 KiB | 5 Q