3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array('foo' => "xyz", null => "abc"); $b = array('bar' => "baz", null => "xyz"); var_dump(array_merge($a,b)); var_dump(merge($a,$b)); function merge(array $a, array $b) { foreach ($b as $key => $value) { if (isset($a[$key])) { if (is_int($key)) { $a[] = $value; } elseif (is_array($value) && is_array($a[$key])) { $a[$key] = static::merge($a[$key], $value); } else { $a[$key] = $value; } } else { $a[$key] = $value; } } return $a; }

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)
5.6.280.0000.07721.05
5.6.250.0070.04720.81
5.6.240.0030.05320.58
5.6.230.0100.08720.61
5.6.220.0170.06720.67
5.6.210.0030.08320.46
5.6.200.0100.05021.00
5.6.190.0030.08020.96
5.6.180.0100.04720.93
5.6.170.0000.05320.94
5.6.160.0130.07721.08
5.6.150.0030.05321.05
5.6.140.0100.08020.90
5.6.130.0200.07321.17
5.6.120.0030.08721.02
5.6.110.0070.05020.93
5.6.100.0130.07321.03
5.6.90.0100.05321.12
5.6.80.0130.07320.44
5.6.70.0030.08720.30
5.6.60.0070.03720.37
5.6.50.0070.05720.41
5.6.40.0070.04320.47
5.6.30.0130.07020.46
5.6.20.0100.07720.42
5.6.10.0130.05720.31
5.6.00.0200.06320.41
5.5.380.0030.04320.57
5.5.370.0100.04720.46
5.5.360.0070.05020.35
5.5.350.0030.07020.38
5.5.340.0070.07720.83
5.5.330.0130.07320.64
5.5.320.0030.05320.93
5.5.310.0200.07320.93
5.5.300.0070.07320.76
5.5.290.0030.05320.90
5.5.280.0000.07320.62
5.5.270.0070.08720.79
5.5.260.0100.08320.92
5.5.250.0100.07720.61
5.5.240.0070.09320.29
5.5.230.0100.07720.14
5.5.220.0070.07720.11
5.5.210.0070.07720.19
5.5.200.0130.07320.22
5.5.190.0100.04719.95
5.5.180.0100.08020.15
5.5.160.0100.08320.24
5.5.150.0170.06720.20
5.5.140.0100.07720.23
5.5.130.0000.07320.17
5.5.120.0070.08320.21
5.5.110.0070.05720.27
5.5.100.0070.08020.08
5.5.90.0100.06020.16
5.5.80.0070.07720.05
5.5.70.0030.04320.15
5.5.60.0100.08320.05
5.5.50.0100.06020.15
5.5.40.0100.07320.14
5.5.30.0100.08320.11
5.5.20.0130.07320.09
5.5.10.0070.07319.98
5.5.00.0070.04320.09
5.4.450.0070.08019.55
5.4.440.0070.07319.35
5.4.430.0230.05719.46
5.4.420.0130.08019.34
5.4.410.0070.07719.23
5.4.400.0000.08719.03
5.4.390.0030.05018.95
5.4.380.0030.07319.04
5.4.370.0100.07319.13
5.4.360.0070.04018.94
5.4.350.0100.07318.91
5.4.340.0030.05019.05
5.4.320.0030.04019.16
5.4.310.0000.06719.21
5.4.300.0130.03719.15
5.4.290.0130.07019.16
5.4.280.0070.08319.16
5.4.270.0070.08019.12
5.4.260.0100.07318.88
5.4.250.0070.07719.02
5.4.240.0170.07019.08
5.4.230.0100.05718.93
5.4.220.0070.04718.94
5.4.210.0130.06719.11
5.4.200.0130.06018.87
5.4.190.0100.07018.85
5.4.180.0170.06019.08
5.4.170.0030.08019.04
5.4.160.0100.07318.83
5.4.150.0070.05319.14
5.4.140.0070.07316.19
5.4.130.0070.07016.45
5.4.120.0100.05016.18
5.4.110.0070.04016.32
5.4.100.0030.08016.46
5.4.90.0070.04016.55
5.4.80.0030.04716.34
5.4.70.0100.05716.30
5.4.60.0170.06716.32
5.4.50.0030.07016.44
5.4.40.0070.06316.42
5.4.30.0070.03316.29
5.4.20.0030.03716.39
5.4.10.0030.03716.32
5.4.00.0030.03715.94
5.3.290.0130.03714.78
5.3.280.0030.07314.55
5.3.270.0070.04014.54
5.3.260.0070.07014.71
5.3.250.0070.05014.71
5.3.240.0070.07314.66
5.3.230.0030.07314.61
5.3.220.0100.06014.63
5.3.210.0100.05714.52
5.3.200.0030.04714.65
5.3.190.0070.03714.59
5.3.180.0100.06714.61
5.3.170.0070.07314.62
5.3.160.0070.07314.59
5.3.150.0070.04714.61
5.3.140.0100.04014.52
5.3.130.0070.07714.60
5.3.120.0030.06714.60
5.3.110.0000.04714.51
5.3.100.0070.03314.14
5.3.90.0000.06014.16
5.3.80.0130.02714.07
5.3.70.0100.07014.08
5.3.60.0030.04013.89
5.3.50.0070.03713.93
5.3.40.0100.03013.98
5.3.30.0030.03713.97
5.3.20.0070.03313.68
5.3.10.0030.03713.59
5.3.00.0000.03713.73
5.2.170.0030.02713.46
5.2.160.0030.03013.46
5.2.150.0030.03313.46
5.2.140.0030.03313.46
5.2.130.0000.03313.46
5.2.120.0070.02313.46
5.2.110.0070.02713.46
5.2.100.0070.02713.46
5.2.90.0030.02713.46
5.2.80.0000.04313.46
5.2.70.0000.03013.46
5.2.60.0000.03013.46
5.2.50.0000.03013.46
5.2.40.0100.05313.46
5.2.30.0000.04313.46
5.2.20.0000.03013.46
5.2.10.0030.04313.46
5.2.00.0100.02013.46
5.1.60.0000.02713.46
5.1.50.0030.02013.46
5.1.40.0030.02313.46
5.1.30.0070.02013.46
5.1.20.0030.04313.46
5.1.10.0100.02713.46
5.1.00.0070.03013.46
5.0.50.0030.02013.46
5.0.40.0030.02013.46
5.0.30.0100.02013.46
5.0.20.0030.01713.46
5.0.10.0000.02013.46
5.0.00.0000.02713.46
4.4.90.0000.01713.46
4.4.80.0030.01313.46
4.4.70.0000.01313.46
4.4.60.0000.02713.46
4.4.50.0070.02313.46
4.4.40.0000.05313.46
4.4.30.0000.03313.46
4.4.20.0030.01713.46
4.4.10.0000.01713.46
4.4.00.0000.02313.46
4.3.110.0030.01313.46
4.3.100.0030.01313.46
4.3.90.0030.01313.46
4.3.80.0070.02013.46
4.3.70.0000.01713.46
4.3.60.0000.01713.46
4.3.50.0000.01313.46
4.3.40.0030.02013.46
4.3.30.0000.01713.46
4.3.20.0070.01013.46
4.3.10.0000.01313.46
4.3.00.0000.01313.46

preferences:
144.31 ms | 1394 KiB | 7 Q