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) { 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)
8.3.60.0110.00416.63
8.3.50.0120.00822.00
8.3.40.0040.01118.69
8.3.30.0040.01119.07
8.3.20.0000.00820.34
8.3.10.0040.00421.73
8.3.00.0030.00719.51
8.2.180.0110.00718.41
8.2.170.0140.00022.96
8.2.160.0140.00020.24
8.2.150.0040.00424.18
8.2.140.0070.00024.66
8.2.130.0000.00726.16
8.2.120.0070.00022.08
8.2.110.0070.00321.91
8.2.100.0040.00817.97
8.2.90.0090.00317.84
8.2.80.0040.00417.97
8.2.70.0000.00817.63
8.2.60.0070.00017.93
8.2.50.0000.00818.07
8.2.40.0080.00019.89
8.2.30.0040.00418.01
8.2.20.0000.00817.88
8.2.10.0050.00318.11
8.2.00.0030.00517.63
8.1.280.0090.00625.92
8.1.270.0050.00323.87
8.1.260.0040.00426.35
8.1.250.0040.00428.09
8.1.240.0060.00322.47
8.1.230.0000.01020.96
8.1.220.0060.00317.78
8.1.210.0090.00018.80
8.1.200.0000.00917.35
8.1.190.0000.00817.52
8.1.180.0060.00318.88
8.1.170.0040.00418.70
8.1.160.0000.00722.02
8.1.150.0080.00018.65
8.1.140.0030.00617.40
8.1.130.0000.00717.89
8.1.120.0070.00017.48
8.1.110.0040.00417.42
8.1.100.0000.01117.44
8.1.90.0050.00317.47
8.1.80.0040.00417.36
8.1.70.0000.00717.42
8.1.60.0000.00817.45
8.1.50.0050.00317.57
8.1.40.0040.00417.44
8.1.30.0050.00317.66
8.1.20.0040.00417.70
8.1.10.0000.00917.38
8.1.00.0000.00717.47
8.0.300.0040.00419.98
8.0.290.0040.00417.16
8.0.280.0000.00718.44
8.0.270.0040.00417.13
8.0.260.0000.00617.26
8.0.250.0030.00316.99
8.0.240.0030.00316.82
8.0.230.0000.00716.98
8.0.220.0000.00716.80
8.0.210.0000.00716.95
8.0.200.0070.00016.96
8.0.190.0040.00416.96
8.0.180.0090.00016.95
8.0.170.0030.00516.95
8.0.160.0000.00716.90
8.0.150.0050.00216.89
8.0.140.0040.00416.79
8.0.130.0090.00013.37
8.0.120.0000.00816.97
8.0.110.0040.00416.81
8.0.100.0020.00516.75
8.0.90.0070.00016.94
8.0.80.0080.00816.82
8.0.70.0050.00216.95
8.0.60.0040.00416.82
8.0.50.0000.00816.91
8.0.30.0100.00816.86
8.0.20.0150.00317.40
8.0.10.0020.00516.84
8.0.00.0110.00616.82
7.4.330.0000.00515.01
7.4.320.0000.00616.59
7.4.300.0060.00016.52
7.4.290.0030.00316.62
7.4.280.0040.00416.61
7.4.270.0070.00016.57
7.4.260.0030.00316.51
7.4.250.0000.00816.48
7.4.240.0050.00216.58
7.4.230.0030.00316.57
7.4.220.0140.00316.63
7.4.210.0080.00916.55
7.4.200.0040.00416.35
7.4.190.0000.00716.60
7.4.160.0110.00416.55
7.4.150.0120.00917.40
7.4.140.0140.00717.86
7.4.130.0070.01016.44
7.4.120.0130.00616.52
7.4.110.0220.00316.45
7.4.100.0080.01116.57
7.4.90.0120.00616.61
7.4.80.0120.01119.39
7.4.70.0090.00916.48
7.4.60.0130.00616.43
7.4.50.0000.00516.34
7.4.40.0090.00922.77
7.4.30.0030.01316.52
7.4.00.0030.01314.83
7.3.330.0000.00513.23
7.3.320.0000.00613.16
7.3.310.0000.00716.22
7.3.300.0030.00316.20
7.3.290.0030.01016.27
7.3.280.0100.00516.32
7.3.270.0090.01217.40
7.3.260.0090.01616.34
7.3.250.0120.00916.54
7.3.240.0110.00716.41
7.3.230.0160.00316.62
7.3.210.0200.00316.41
7.3.200.0160.00819.39
7.3.190.0170.00316.36
7.3.180.0100.00516.29
7.3.170.0130.00316.57
7.3.160.0120.00916.66
7.3.120.0050.01114.94
7.3.110.0150.00414.89
7.3.100.0070.01014.75
7.3.90.0040.01414.63
7.3.80.0000.01114.97
7.3.70.0030.01214.69
7.3.60.0080.00814.99
7.3.50.0110.00314.79
7.3.40.0000.01514.60
7.3.30.0000.00814.90
7.3.20.0100.00316.64
7.3.10.0060.00916.69
7.3.00.0070.00316.84
7.2.330.0030.01316.64
7.2.320.0070.01116.75
7.2.310.0160.00316.55
7.2.300.0100.00716.66
7.2.290.0140.00816.68
7.2.250.0070.01014.84
7.2.240.0160.00415.22
7.2.230.0030.01614.68
7.2.220.0000.01415.06
7.2.210.0070.00715.28
7.2.200.0030.01315.21
7.2.190.0070.00715.08
7.2.180.0070.00714.77
7.2.170.0040.00815.11
7.2.00.0060.00619.29
7.1.330.0060.01015.90
7.1.320.0070.00715.84
7.1.310.0000.01515.68
7.1.300.0070.00715.77
7.1.290.0080.00515.80
7.1.280.0040.01115.88
7.1.270.0040.00815.68
7.1.260.0040.00715.98
7.1.200.0120.00315.46
7.1.100.0120.00318.06
7.1.70.0080.00016.96
7.1.60.0070.01819.46
7.1.50.0060.00916.90
7.1.00.0070.07322.54
7.0.200.0030.00616.52
7.0.140.0000.07722.08
7.0.110.0570.05019.98
7.0.100.0330.04319.88
7.0.90.0200.08320.05
7.0.80.0200.05320.00
7.0.70.0570.04320.01
7.0.60.0330.07020.08
7.0.50.0500.08020.00
7.0.40.0100.06719.70
7.0.30.0070.08019.70
7.0.20.0000.04719.77
7.0.10.0070.04719.77
7.0.00.0170.03019.82
5.6.280.0070.07020.79
5.6.260.0130.03320.63
5.6.250.0130.07320.69
5.6.240.0070.08320.87
5.6.230.0100.04020.69
5.6.220.0000.05320.64
5.6.210.0070.04020.62
5.6.200.0030.04020.60
5.6.190.0070.05720.71
5.6.180.0000.05020.64
5.6.170.0070.04320.66
5.6.160.0030.05320.66
5.6.150.0070.08320.66
5.6.140.0070.06320.61
5.6.130.0030.06020.64
5.6.120.0100.03720.55
5.6.110.0070.08720.65
5.6.100.0000.04720.67
5.6.90.0100.04020.55
5.6.80.0030.05019.93
5.6.70.0070.05019.96
5.6.60.0100.03720.02
5.6.50.0100.04719.86
5.6.40.0030.04719.95
5.6.30.0030.07019.92
5.6.20.0030.04019.93
5.6.10.0070.03719.98
5.6.00.0030.04019.95
5.5.380.0000.05317.54
5.5.370.0100.03717.70
5.5.360.0100.04317.56
5.5.350.0000.04317.64
5.5.340.0000.04018.10
5.5.330.0100.04017.94
5.5.320.0070.06718.10
5.5.310.0070.03718.10
5.5.300.0030.04018.10
5.5.290.0000.07017.95
5.5.280.0030.04317.83
5.5.270.0100.06718.09
5.5.260.0000.07317.91
5.5.250.0000.05317.77
5.5.240.0100.06317.30
5.5.230.0100.06017.34
5.5.220.0130.06717.45
5.5.210.0070.04717.50
5.5.200.0100.03717.40
5.5.190.0000.04017.43
5.5.180.0000.04317.59
5.5.160.0070.04717.48
5.5.150.0000.05317.28
5.5.140.0000.08017.25
5.5.130.0030.04017.45
5.5.120.0130.03017.29
5.5.110.0100.06317.60
5.5.100.0030.04017.18
5.5.90.0000.07017.50
5.5.80.0030.04017.18
5.5.70.0130.07717.36
5.5.60.0100.03717.16
5.5.50.0070.04717.15
5.5.40.0130.06717.47
5.5.30.0130.02717.37
5.5.20.0100.05017.16
5.5.10.0070.07017.15
5.5.00.0030.08017.32
5.4.450.0070.07719.32
5.4.440.0030.04019.36
5.4.430.0070.07019.50
5.4.420.0100.08019.32
5.4.410.0030.07319.21
5.4.400.0100.05719.17
5.4.390.0070.06719.18
5.4.380.0030.06019.18
5.4.370.0030.04018.98
5.4.360.0100.06019.24
5.4.350.0030.08319.01
5.4.340.0030.04019.01
5.4.320.0100.04719.09
5.4.310.0070.07319.16
5.4.300.0100.03319.03
5.4.290.0100.07319.31
5.4.280.0030.06718.98
5.4.270.0070.05319.31
5.4.260.0070.06719.20
5.4.250.0000.06319.20
5.4.240.0030.04019.00
5.4.230.0070.04019.16
5.4.220.0000.06019.00
5.4.210.0100.07018.98
5.4.200.0130.03019.30
5.4.190.0070.06319.16
5.4.180.0070.05719.00
5.4.170.0100.07018.97
5.4.160.0100.07319.00
5.4.150.0030.06719.13
5.4.140.0100.04016.38
5.4.130.0030.03716.58
5.4.120.0030.05016.60
5.4.110.0030.07716.62
5.4.100.0030.06316.46
5.4.90.0070.08016.64
5.4.80.0070.03316.35
5.4.70.0070.03316.50
5.4.60.0070.07016.53
5.4.50.0170.06316.39
5.4.40.0070.06716.45
5.4.30.0100.03016.23
5.4.20.0130.06716.51
5.4.10.0030.03716.56
5.4.00.0030.04015.79
5.3.290.0070.07314.54
5.3.280.0130.05314.61
5.3.270.0130.06714.61
5.3.260.0000.04314.62
5.3.250.0100.03314.63
5.3.240.0070.06314.69
5.3.230.0070.06314.56
5.3.220.0030.03714.56
5.3.210.0070.07014.43
5.3.200.0070.07714.61
5.3.190.0070.04314.71
5.3.180.0070.08014.59
5.3.170.0030.03714.55
5.3.160.0070.04014.70
5.3.150.0070.03714.58
5.3.140.0000.06714.64
5.3.130.0030.06014.57
5.3.120.0130.07314.41
5.3.110.0030.05714.63
5.3.100.0030.06014.02
5.3.90.0070.04714.03
5.3.80.0130.04014.15
5.3.70.0130.06014.03
5.3.60.0170.04013.98
5.3.50.0070.04314.02
5.3.40.0000.04313.96
5.3.30.0000.05313.91
5.3.20.0000.03313.68
5.3.10.0070.02313.65
5.3.00.0030.03313.66
5.2.170.0070.04311.96
5.2.160.0200.02311.96
5.2.150.0000.03311.96
5.2.140.0000.03711.96
5.2.130.0030.02711.96
5.2.120.0000.03011.96
5.2.110.0070.03011.96
5.2.100.0000.03011.96
5.2.90.0000.03311.96
5.2.80.0000.03011.96
5.2.70.0100.02011.96
5.2.60.0000.02711.96
5.2.50.0000.03711.96
5.2.40.0070.02011.96
5.2.30.0030.02311.96
5.2.20.0070.02011.96
5.2.10.0100.01711.96
5.2.00.0030.02311.96
5.1.60.0030.02011.96
5.1.50.0030.02011.96
5.1.40.0070.01711.96
5.1.30.0000.03011.96
5.1.20.0030.02011.96
5.1.10.0100.01311.96
5.1.00.0030.02011.96
5.0.50.0000.01711.96
5.0.40.0000.02011.96
5.0.30.0030.02311.96
5.0.20.0000.01711.96
5.0.10.0000.01711.96
5.0.00.0030.02311.96
4.4.90.0000.01311.96
4.4.80.0000.01311.96
4.4.70.0030.01311.96
4.4.60.0000.01711.96
4.4.50.0030.01311.96
4.4.40.0000.02011.96
4.4.30.0000.01311.96
4.4.20.0000.01311.96
4.4.10.0000.01711.96
4.4.00.0000.02011.96
4.3.110.0030.01011.96
4.3.100.0000.01311.96
4.3.90.0000.01311.96
4.3.80.0000.02011.96
4.3.70.0000.01311.96
4.3.60.0030.01011.96
4.3.50.0070.00711.96
4.3.40.0000.02011.96
4.3.30.0030.01011.96
4.3.20.0030.01311.96
4.3.10.0030.01011.96
4.3.00.0100.00711.96

preferences:
49.15 ms | 401 KiB | 5 Q