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run code in 300+ PHP versions simultaneously
<?php class Helpers { /** * Like array_merge() but case-insensitive keys comparison. * @param array * @param array * @return array */ public static function iMerge(array $one, array $two) { $keys = array_combine(array_keys(array_change_key_case($one, CASE_LOWER)), array_keys($one)); foreach ($two as $k => $v) { if (is_int($k)) { $one[] = $v; } elseif (array_key_exists($lower = strtolower($k), $keys)) { $one[$keys[$lower]] = $v; } else { $one[$k] = $v; } } return $one; } } $one = array(0, 'a' => 'aaa', 'b' => 'bbb', 1); $two = array(2, 'A' => 'AAA', 'C' => 'CCC', 3); var_dump(Helpers::iMerge($one, $two));

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)
8.3.60.0070.01318.43
8.3.50.0120.00921.14
8.3.40.0090.00918.88
8.3.30.0120.00618.55
8.3.20.0040.00418.69
8.3.10.0020.00521.00
8.3.00.0040.00423.66
8.2.180.0070.00716.75
8.2.170.0120.00322.96
8.2.160.0130.00020.39
8.2.150.0060.00324.18
8.2.140.0080.00024.66
8.2.130.0000.00826.16
8.2.120.0070.00021.12
8.2.110.0080.00320.39
8.2.100.0120.00317.84
8.2.90.0040.00419.21
8.2.80.0040.00419.28
8.2.70.0030.00717.63
8.2.60.0030.00618.03
8.2.50.0080.00018.07
8.2.40.0070.00018.34
8.2.30.0000.00719.44
8.2.20.0000.00717.80
8.2.10.0050.00317.83
8.2.00.0050.00517.63
8.1.280.0070.00725.92
8.1.270.0040.00423.99
8.1.260.0120.00626.35
8.1.250.0030.00528.09
8.1.240.0090.00023.86
8.1.230.0000.01222.61
8.1.220.0080.00018.77
8.1.210.0030.00618.84
8.1.200.0090.00017.35
8.1.190.0020.00517.54
8.1.180.0040.00418.10
8.1.170.0040.00418.47
8.1.160.0040.00418.82
8.1.150.0000.00818.66
8.1.140.0070.00017.51
8.1.130.0030.00317.90
8.1.120.0020.00517.46
8.1.110.0040.00417.52
8.1.100.0000.00817.51
8.1.90.0040.00417.42
8.1.80.0070.00017.47
8.1.70.0000.00717.42
8.1.60.0030.00617.60
8.1.50.0050.00217.46
8.1.40.0030.00617.43
8.1.30.0000.00817.67
8.1.20.0040.00417.65
8.1.10.0060.00317.52
8.1.00.0060.00317.36
8.0.300.0040.00419.91
8.0.290.0000.00717.18
8.0.280.0030.00318.48
8.0.270.0000.00717.19
8.0.260.0060.00016.88
8.0.250.0030.00516.96
8.0.240.0030.00516.98
8.0.230.0000.00916.94
8.0.220.0000.00816.90
8.0.210.0000.00716.93
8.0.200.0000.00716.99
8.0.190.0070.00017.05
8.0.180.0050.00316.97
8.0.170.0000.00716.79
8.0.160.0000.00716.96
8.0.150.0070.00016.86
8.0.140.0040.00416.90
8.0.130.0060.00013.42
8.0.120.0030.00616.72
8.0.110.0070.00016.91
8.0.100.0050.00216.77
8.0.90.0050.00217.02
8.0.80.0090.00616.93
8.0.70.0040.00416.86
8.0.60.0000.00716.93
8.0.50.0080.00017.00
8.0.30.0100.00916.93
8.0.20.0110.01217.40
8.0.10.0040.00417.04
8.0.00.0060.01416.76
7.4.330.0020.00515.00
7.4.320.0000.00716.48
7.4.300.0030.00316.68
7.4.290.0000.00716.57
7.4.280.0030.00316.50
7.4.270.0050.00316.52
7.4.260.0000.00513.24
7.4.250.0050.00216.59
7.4.240.0030.00316.64
7.4.230.0030.00316.46
7.4.220.0060.01916.59
7.4.210.0050.01116.55
7.4.200.0030.00316.44
7.4.190.0000.00716.33
7.4.160.0030.01416.30
7.4.150.0160.00317.40
7.4.140.0120.01117.86
7.4.130.0150.01016.49
7.4.120.0110.00616.53
7.4.110.0170.00716.37
7.4.100.0130.00416.68
7.4.90.0090.00916.59
7.4.80.0060.01219.39
7.4.70.0090.01216.47
7.4.60.0070.01016.62
7.4.50.0040.00416.27
7.4.40.0090.00322.77
7.4.30.0130.01116.67
7.4.00.0080.00415.14
7.3.330.0060.00013.23
7.3.320.0050.00013.36
7.3.310.0000.00716.35
7.3.300.0070.00016.33
7.3.290.0100.01016.38
7.3.280.0090.00816.41
7.3.270.0070.01117.40
7.3.260.0100.01118.24
7.3.250.0040.01316.60
7.3.240.0100.00716.34
7.3.230.0140.00716.42
7.3.210.0170.00016.38
7.3.200.0170.00019.39
7.3.190.0120.01116.41
7.3.180.0050.01116.37
7.3.170.0000.01616.41
7.3.160.0140.00616.58
7.3.120.0000.01114.51
7.2.330.0140.01116.49
7.2.320.0060.01116.50
7.2.310.0130.01016.48
7.2.300.0100.01316.67
7.2.290.0120.01216.76
7.2.60.0070.00716.86
7.2.00.0040.01119.52
7.1.200.0060.00715.91
7.1.100.0040.00718.13
7.1.70.0040.00417.00
7.1.60.0070.00717.27
7.1.50.0030.01716.79
7.1.00.0030.03322.35
7.0.200.0000.01616.82
7.0.140.0030.07322.09
7.0.60.0070.08021.73
7.0.50.0130.07317.86
7.0.40.0130.07720.15
7.0.30.0330.08020.20
7.0.20.0370.08320.24
7.0.10.0170.08720.16
7.0.00.0130.05720.14
5.6.280.0030.07321.02
5.6.210.0070.07020.53
5.6.200.0200.05018.21
5.6.190.0070.09320.46
5.6.180.0270.07720.33
5.6.170.0230.03320.49
5.6.160.0000.07320.44
5.6.150.0000.07018.25
5.6.140.0130.03318.11
5.6.130.0070.04018.27
5.6.120.0000.04721.02
5.6.110.0100.08321.13
5.6.100.0100.08321.00
5.6.90.0030.04320.95
5.6.80.0070.07720.38
5.5.350.4030.04720.47
5.5.340.0030.04017.97
5.5.330.0000.04320.40
5.5.320.0500.07020.31
5.5.310.0400.07020.41
5.5.300.0030.08018.03
5.5.290.0070.03718.08
5.5.280.0200.06320.80
5.5.270.0100.08320.68
5.5.260.0200.07720.84
5.5.250.0100.08720.59
5.5.240.0100.09020.19
5.4.450.4530.03319.43
5.4.440.1970.04019.48
5.4.430.2970.05019.54
5.4.420.2970.04319.25
5.4.410.3330.04019.30
5.4.400.3570.04018.94
5.4.390.3700.04319.11
5.4.380.3570.03319.23
5.4.370.3570.02719.04
5.4.360.3830.03719.15
5.4.350.4030.04019.23
5.4.340.4200.04318.99
5.4.320.3530.04018.96
5.4.310.4030.04718.93
5.4.300.3500.03718.97
5.4.290.3900.03019.20
5.4.280.3630.04018.93
5.4.270.4070.04319.20
5.4.260.4070.04319.04
5.4.250.4100.04019.25
5.4.240.3730.04019.21
5.4.230.3800.04019.12
5.4.220.3530.03719.15
5.4.210.4100.04019.21
5.4.200.3700.03718.97
5.4.190.3830.03719.05
5.4.180.3800.04318.96
5.4.170.3930.03019.21
5.4.160.3800.04718.97
5.4.150.3800.04019.08
5.4.140.3730.04016.46
5.4.130.3830.03716.44
5.4.120.3800.03316.34
5.4.110.3830.03716.52
5.4.100.3630.04016.32
5.4.90.3530.03716.63
5.4.80.3800.03316.34
5.4.70.3300.02716.24
5.4.60.3770.03716.47
5.4.50.3300.03316.34
5.4.40.3570.03716.45
5.4.30.3830.03716.50
5.4.20.3730.03316.34
5.4.10.4630.04016.42
5.4.00.1270.03715.86
5.3.290.3670.04014.66
5.3.280.3870.04014.64
5.3.270.3800.04014.68
5.3.260.3770.03714.61
5.3.250.3870.03314.49
5.3.240.3670.02714.53
5.3.230.4030.05014.52
5.3.220.4070.04314.71
5.3.210.3900.03714.71
5.3.200.3470.03314.64
5.3.190.3700.03314.71
5.3.180.3830.03714.56
5.3.170.3830.03714.58
5.3.160.4130.03714.57
5.3.150.3900.03014.59
5.3.140.3670.04014.61
5.3.130.3830.04014.57
5.3.120.3670.03014.62
5.3.110.3770.04014.62
5.3.100.0030.05014.11
5.3.90.0070.06314.18
5.3.80.0800.06714.17
5.3.70.3670.03013.91
5.3.60.4030.04314.16
5.3.50.3800.03313.95
5.3.40.3530.05314.00
5.3.30.3600.04013.91
5.3.20.4530.03013.59
5.3.10.3770.03013.81
5.3.00.3600.03313.64
5.2.170.3230.02711.20
5.2.160.3200.02711.15
5.2.150.3100.02011.11
5.2.140.3200.03011.14
5.2.130.3070.03011.07
5.2.120.3030.02711.07
5.2.110.3030.02711.18
5.2.100.3000.02711.16
5.2.90.3600.02711.14
5.2.80.2600.03311.10
5.2.70.1770.02311.15
5.2.60.2500.02710.97
5.2.50.2230.02311.03
5.2.40.1870.02711.06
5.2.30.0000.03010.98
5.2.20.0030.02710.96
5.2.10.0030.02710.93
5.2.00.0630.02710.80
5.1.60.2130.02310.06
5.1.50.1770.02710.14
5.1.40.1970.0239.95
5.1.30.1900.02710.39
5.1.20.2570.02010.37
5.1.10.2400.02710.02
5.1.00.2330.02710.04
5.0.50.1370.0208.54
5.0.40.1370.0238.48
5.0.30.1430.0338.20
5.0.20.1530.0178.11
5.0.10.1270.0208.16
5.0.00.1430.0308.11
4.4.90.0430.0176.06
4.4.80.1000.0076.06
4.4.70.0030.0136.06
4.4.60.0070.0106.06
4.4.50.0000.0236.06
4.4.40.1070.0236.06
4.4.30.1170.0076.06
4.4.20.1300.0106.06
4.4.10.1400.0206.06
4.4.00.1400.0276.06
4.3.110.1430.0136.06
4.3.100.1300.0136.06
4.3.90.0800.0336.06
4.3.80.1270.0236.06
4.3.70.1270.0176.06
4.3.60.1400.0206.06
4.3.50.1230.0136.06
4.3.40.1570.0236.06
4.3.30.0830.0236.06
4.3.20.0970.0236.06
4.3.10.0800.0176.06
4.3.00.0830.0176.06

preferences:
41.23 ms | 401 KiB | 5 Q