3v4l.org

run code in 300+ PHP versions simultaneously
<?php function merge(array $a, array $b, $preserveNumericKeys = false) { foreach ($b as $key => $value) { if (array_key_exists($key, $a)) { if (is_int($key) && !$preserveNumericKeys) { $a[] = $value; } elseif (is_array($value) && is_array($a[$key])) { $a[$key] = static::merge($a[$key], $value, $preserveNumericKeys); } else { $a[$key] = $value; } } else { $a[$key] = $value; } } return $a; } for ($x = 0; $x < 10000; $x++) { $r = merge(array('franz', 'de leon'), array('franz', 'kafka')); } var_dump($r);

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)
5.6.280.0100.09021.02
5.6.250.0030.04720.75
5.6.240.0000.05720.70
5.6.230.0070.04020.51
5.6.220.0030.04720.65
5.6.210.0000.04720.46
5.6.200.0070.07021.09
5.6.190.0030.05721.14
5.6.180.0030.06321.11
5.6.170.0000.13021.01
5.6.160.0030.07721.13
5.6.150.0030.09720.95
5.6.140.0100.05021.04
5.6.130.0030.09321.13
5.6.120.0030.07021.11
5.6.110.0130.04721.07
5.6.100.0100.09320.93
5.6.90.0100.06020.96
5.6.80.0100.06720.51
5.6.70.0070.07720.46
5.6.60.0100.07020.48
5.6.50.0070.07320.42
5.6.40.0000.07320.32
5.6.30.0130.08320.45
5.6.20.0130.08720.46
5.6.10.0000.07320.44
5.6.00.0170.05320.36
5.5.380.0070.04020.55
5.5.370.0030.04720.45
5.5.360.0000.05320.44
5.5.350.0030.04320.46
5.5.340.0100.09720.93
5.5.330.0070.05320.92
5.5.320.0030.05320.86
5.5.310.0000.07720.93
5.5.300.0100.09020.83
5.5.290.0030.07020.89
5.5.280.0030.07320.76
5.5.270.0100.08720.77
5.5.260.0200.09020.88
5.5.250.0070.09720.71
5.5.240.0100.05720.16
5.5.230.0100.06320.26
5.5.220.0070.05720.30
5.5.210.0100.04720.15
5.5.200.0070.08720.18
5.5.190.0070.10020.17
5.5.180.0130.07720.15
5.5.160.0130.09320.08
5.5.150.0030.06320.08
5.5.140.0000.06319.98
5.5.130.0030.05720.16
5.5.120.0030.05319.99
5.5.110.0000.06320.18
5.5.100.0100.06020.07
5.5.90.0130.07020.16
5.5.80.0130.05720.04
5.5.70.0070.06019.95
5.5.60.0130.06720.09
5.5.50.0070.07020.04
5.5.40.0130.05320.09
5.5.30.0100.04719.96
5.5.20.0070.05020.14
5.5.10.0100.06020.06
5.5.00.0030.06320.05
5.4.450.0070.07019.54
5.4.440.0130.09019.58
5.4.430.0070.07719.17
5.4.420.0170.07719.52
5.4.410.0100.07019.43
5.4.400.0130.09719.18
5.4.390.0000.05719.04
5.4.380.0100.06019.03
5.4.370.0070.07019.04
5.4.360.0100.09018.87
5.4.350.0030.08319.05
5.4.340.0030.09319.18
5.4.320.0070.10018.90
5.4.310.0030.06718.91
5.4.300.0070.05318.84
5.4.290.0070.05019.16
5.4.280.0070.06019.07
5.4.270.0070.04719.12
5.4.260.0070.06019.20
5.4.250.0130.05719.03
5.4.240.0070.06019.11
5.4.230.0030.05019.15
5.4.220.0130.06319.04
5.4.210.0030.05019.09
5.4.200.0000.07019.09
5.4.190.0030.05019.07
5.4.180.0070.04718.84
5.4.170.0170.04318.86
5.4.160.0100.08718.85
5.4.150.0100.06019.16
5.4.140.0100.05016.20
5.4.130.0100.04716.32
5.4.120.0100.09016.49
5.4.110.0000.06016.32
5.4.100.0070.06716.43
5.4.90.0100.08716.48
5.4.80.0170.05716.46
5.4.70.0100.08016.41
5.3.290.0070.08014.61
5.3.280.0070.07314.65
5.3.270.0000.06714.67
5.3.260.0100.04714.54
5.3.250.0030.07014.70
5.3.240.0070.10314.54
5.3.230.0030.05714.61
5.3.220.0130.08314.70
5.3.210.0070.06014.55
5.3.200.0070.08014.63
5.3.190.0100.05314.52
5.3.180.0070.10314.61
5.3.170.0070.05314.50
5.2.60.0070.04013.67
5.2.50.0070.05013.67
5.2.40.0070.05313.67
5.2.30.0070.06013.67
5.2.20.0070.06013.67
5.2.10.0000.05713.67
5.2.00.0070.04713.67
5.1.60.0030.03713.67
5.1.50.0070.03013.67
5.1.40.0070.03713.67
5.1.30.0130.04713.67
5.1.20.0070.05013.67
5.1.10.0030.05713.67
5.1.00.0070.03313.67
5.0.50.0070.03313.67
5.0.40.0030.05013.67
5.0.30.0030.06713.67
5.0.20.0070.03713.67
5.0.10.0000.02313.67
5.0.00.0070.04313.67
4.4.80.0070.02313.67
4.4.70.0000.02313.67
4.4.60.0030.03313.67
4.4.50.0070.03013.67
4.4.40.0000.05713.67
4.4.30.0030.02713.67
4.4.20.0030.03013.67
4.4.10.0000.03313.67
4.4.00.0030.04313.67
4.3.110.0000.02713.67
4.3.100.0000.03013.67
4.3.90.0000.02313.67
4.3.80.0000.04713.67
4.3.70.0030.02713.67
4.3.60.0030.03713.67
4.3.50.0070.02713.67
4.3.40.0000.04713.67
4.3.30.0000.02713.67
4.3.20.0000.03313.67
4.3.10.0000.03313.67
4.3.00.0000.03013.67

preferences:
165.69 ms | 1398 KiB | 7 Q