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 < 100; $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)
5.6.280.0000.07721.02
5.6.250.0000.04320.60
5.6.240.0070.04020.64
5.6.230.0030.05020.70
5.6.220.0030.04020.59
5.6.210.0030.04020.65
5.6.200.0000.04721.13
5.6.190.0070.03721.14
5.6.180.0070.04021.07
5.6.170.0000.07721.02
5.6.160.0100.03721.05
5.6.150.0030.07721.04
5.6.140.0130.07721.06
5.6.130.0170.08021.08
5.6.120.0130.07320.97
5.6.110.0070.08320.99
5.6.100.0030.04321.17
5.6.90.0130.07321.03
5.6.80.0100.07720.48
5.6.70.0030.04720.45
5.6.60.0070.08720.48
5.6.50.0030.07320.50
5.6.40.0130.07320.30
5.6.30.0070.06020.47
5.6.20.0070.06720.30
5.6.10.0000.05320.43
5.6.00.0100.08020.30
5.5.380.0100.03320.58
5.5.370.0000.04320.36
5.5.360.0030.04320.35
5.5.350.0030.04720.39
5.5.340.0000.04720.91
5.5.330.0070.04720.92
5.5.320.0030.04320.73
5.5.310.0070.04020.80
5.5.300.0000.06720.91
5.5.290.0100.06320.84
5.5.280.0130.04720.78
5.5.270.0100.07020.72
5.5.260.0000.08720.82
5.5.250.0070.07020.45
5.5.240.0130.06720.02
5.5.230.0130.07320.10
5.5.220.0030.06320.21
5.5.210.0030.08320.30
5.5.200.0070.05020.17
5.5.190.0130.04320.24
5.5.180.0030.08720.16
5.5.160.0130.07020.11
5.5.150.0130.06720.24
5.5.140.0030.07020.08
5.5.130.0070.08020.15
5.5.120.0130.05019.98
5.5.110.0030.07020.22
5.5.100.0130.05320.07
5.5.90.0200.03319.95
5.5.80.0070.04720.10
5.5.70.0070.08720.10
5.5.60.0030.05320.12
5.5.50.0100.06720.14
5.5.40.0070.08020.10
5.5.30.0100.04720.06
5.5.20.0070.07720.09
5.5.10.0130.07320.09
5.5.00.0070.08020.07
5.4.450.0030.08719.49
5.4.440.0100.06719.36
5.4.430.0130.07019.25
5.4.420.0100.06719.17
5.4.410.0130.07019.23
5.4.400.0100.07019.13
5.4.390.0200.06019.16
5.4.380.0030.06719.14
5.4.370.0000.05018.88
5.4.360.0200.06719.21
5.4.350.0030.07719.14
5.4.340.0070.08019.05
5.4.320.0100.07018.90
5.4.310.0070.06718.91
5.4.300.0100.07018.95
5.4.290.0070.07319.16
5.4.280.0030.05318.88
5.4.270.0070.08019.09
5.4.260.0000.07719.12
5.4.250.0200.06018.89
5.4.240.0100.06019.04
5.4.230.0070.07319.15
5.4.220.0230.06718.95
5.4.210.0100.06319.16
5.4.200.0100.06719.05
5.4.190.0030.07719.02
5.4.180.0200.06319.13
5.4.170.0030.04018.87
5.4.160.0130.03719.01
5.4.150.0130.07019.02
5.4.140.0130.07716.28
5.4.130.0000.06016.33
5.4.120.0030.05016.34
5.4.110.0130.05316.39
5.4.100.0030.07716.46
5.4.90.0070.06016.32
5.4.80.0070.06316.44
5.4.70.0100.06716.50
5.4.60.0070.07016.25
5.4.50.0030.07016.41
5.4.40.0000.04016.41
5.4.30.0100.07016.49
5.4.20.0030.06716.21
5.4.10.0000.04716.49
5.4.00.0030.04315.72
5.3.290.0170.07014.65
5.3.280.0030.07714.55
5.3.270.0030.05314.66
5.3.260.0070.06714.55
5.3.250.0130.06714.56
5.3.240.0030.08014.68
5.3.230.0130.06714.58
5.3.220.0130.03714.56
5.3.210.0030.07714.63
5.3.200.0130.07314.59
5.3.190.0030.04714.55
5.3.180.0070.08014.69
5.3.170.0100.07314.50
5.3.160.0130.06714.60
5.3.150.0130.06714.50
5.3.140.0030.08014.51
5.3.130.0070.07314.64
5.3.120.0100.07014.62
5.3.110.0130.04014.48
5.3.100.0000.04014.20
5.3.90.0030.07714.16
5.3.80.0030.04014.00
5.3.70.0070.06014.05
5.3.60.0070.07014.10
5.3.50.0070.06314.01
5.3.40.0070.07314.09
5.3.30.0100.06313.80
5.3.20.0100.06713.68
5.3.10.0070.06313.72
5.3.00.0030.07713.74
5.2.170.0030.04311.13
5.2.160.0000.03011.26
5.2.150.0030.03711.10
5.2.140.0130.04311.20
5.2.130.0130.04011.09
5.2.120.0030.06711.17
5.2.110.0070.03311.22
5.2.100.0000.05711.22
5.2.90.0030.06711.17
5.2.80.0100.04011.15
5.2.70.0100.05711.03
5.2.60.0100.04710.96
5.2.50.0070.05711.11
5.2.40.0030.06310.86
5.2.30.0070.04011.04
5.2.20.0130.03711.09
5.2.10.0030.06010.82
5.2.00.0070.03310.79
5.1.60.0000.05310.01
5.1.50.0070.05010.01
5.1.40.0030.03710.01
5.1.30.0000.04010.41
5.1.20.0070.05010.22
5.1.10.0000.0609.91
5.1.00.0070.0279.98
5.0.50.0000.0479.17
5.0.40.0000.0479.17
5.0.30.0000.0579.17
5.0.20.0030.0379.17
5.0.10.0070.0339.17
5.0.00.0030.0679.17
4.4.90.0000.0379.17
4.4.80.0000.0309.17
4.4.70.0030.0379.17
4.4.60.0000.0309.17
4.4.50.0030.0339.17
4.4.40.0000.0509.17
4.4.30.0100.0309.17
4.4.20.0000.0379.17
4.4.10.0000.0379.17
4.4.00.0030.0509.17
4.3.110.0030.0309.17
4.3.100.0000.0339.17
4.3.90.0070.0309.17
4.3.80.0000.0509.17
4.3.70.0000.0209.17
4.3.60.0000.0239.17
4.3.50.0030.0279.17
4.3.40.0070.0309.17
4.3.30.0030.0139.17
4.3.20.0000.0409.17
4.3.10.0100.0279.17
4.3.00.0000.0279.17

preferences:
154.96 ms | 1398 KiB | 7 Q