3v4l.org

run code in 300+ PHP versions simultaneously
<?php $classmap1 = array(); for ($i=1; $i<=1000; $i++) { $classmap1['a'.$i] = $i+1; } $classmap2 = array(); for ($i=1; $i<=1000; $i++) { $classmap2['b'.$i] = $i+1; } $startTimeMerge = microtime(true); $map = array_merge($classmap1, $classmap2); $endTimeMerge = microtime(true); $startTimeForeach = microtime(true); foreach ($classmap2 as $k => $v) { $classmap1[$k] = $v; } $endTimeForeach = microtime(true); abstract class merging { public static function amerge(array $a, array &$b) { foreach ($b as $key => $value) { $a[$key] = $value; } return $a; } } $startTimeFunc = microtime(true); merging::amerge($classmap1, $classmap2); $endTimeFunc = microtime(true); echo "Merging took " . (($endTimeMerge - $startTimeMerge)*1000) ." microseconds<br />\n"; //var_dump($map); echo "Foreach took " . (($endTimeForeach - $startTimeForeach)*1000) ." microseconds<br />\n"; //var_dump($classmap1); echo "Func took " . (($endTimeFunc - $startTimeFunc)*1000) ." microseconds<br />\n"; //var_dump($am);

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)
7.3.10.0060.00616.36
7.3.00.0030.01016.62
7.2.130.0030.01017.14
7.2.120.0000.01217.03
7.2.110.0030.00917.00
7.2.100.0060.00616.94
7.2.90.0040.01117.09
7.2.80.0030.01016.74
7.2.70.0110.00316.99
7.2.60.0100.00016.79
7.2.50.0000.01217.05
7.2.40.0060.00616.98
7.2.30.0110.00316.71
7.2.20.0070.00316.92
7.2.10.0130.00016.71
7.2.00.0010.01118.09
7.1.250.0060.00615.61
7.1.70.0000.00917.21
7.1.60.0140.01119.32
7.1.50.0060.01217.01
7.1.00.0030.03322.40
7.0.200.0060.00316.70
7.0.140.0070.07321.96
7.0.100.0430.07020.30
7.0.90.0270.05020.29
7.0.80.0200.07720.35
7.0.70.0070.08020.34
7.0.60.0300.08320.27
7.0.50.0170.04020.79
7.0.40.0070.07320.09
7.0.30.0000.04320.15
7.0.20.0030.09020.11
7.0.10.0070.06720.14
7.0.00.0030.04320.14
5.6.280.0070.07021.68
5.6.250.0070.06721.46
5.6.240.0070.08021.41
5.6.230.0100.07021.38
5.6.220.0070.08021.28
5.6.210.0100.06321.48
5.6.200.0070.04721.92
5.6.190.0030.08321.89
5.6.180.0000.04321.95
5.6.170.0070.08021.81
5.6.160.0070.08021.82
5.6.150.0070.04721.95
5.6.140.0070.08721.66
5.6.130.0100.07021.79
5.6.120.0130.07321.92
5.6.110.0100.08721.88
5.6.100.0100.07721.79
5.6.90.0170.06321.84
5.6.80.0100.07721.21
5.6.70.0030.04321.22
5.6.60.0100.08021.20
5.6.50.0000.05721.33
5.6.40.0070.08021.25
5.6.30.0030.08321.11
5.6.20.0130.03321.07
5.6.10.0070.07321.09
5.6.00.0000.07721.13
5.5.380.0100.07021.23
5.5.370.0030.07321.21
5.5.360.0200.03721.16
5.5.350.0030.09321.16
5.5.340.0130.07021.53
5.5.330.0100.08721.57
5.5.320.0070.09021.63
5.5.310.0070.08021.69
5.5.300.0070.08721.60
5.5.290.0170.07021.64
5.5.280.0170.04021.70
5.5.270.0170.07021.62
5.5.260.0200.06721.43
5.5.250.0070.07721.48
5.5.240.0100.07720.99
5.5.230.0130.07020.91
5.5.220.0000.09021.04
5.5.210.0030.08021.05
5.5.200.0030.05721.07
5.5.190.0070.08321.07
5.5.180.0070.08020.99
5.5.160.0100.07721.01
5.5.150.0070.04021.04
5.5.140.0030.08321.03
5.5.130.0170.07321.02
5.5.120.0170.04720.79
5.5.110.0030.07721.06
5.5.100.0070.05020.88
5.5.90.0030.05320.93
5.5.80.0100.06020.97
5.5.70.0070.04720.90
5.5.60.0070.03320.89
5.5.50.0100.04020.83
5.5.40.0000.05020.84
5.5.30.0030.04320.88
5.5.20.0030.04020.95
5.5.10.0070.03720.85
5.5.00.0030.04020.81
5.4.450.0070.07720.01
5.4.440.0100.08020.12
5.4.430.0070.05020.08
5.4.420.0100.04320.10
5.4.410.0030.08019.95
5.4.400.0070.07719.74
5.4.390.0130.07019.63
5.4.380.0070.07019.85
5.4.370.0070.07319.63
5.4.360.0070.07719.59
5.4.350.0070.04719.77
5.4.340.0100.08019.75
5.4.320.0070.07319.94
5.4.310.0200.06319.69
5.4.300.0070.06719.74
5.4.290.0130.06719.73
5.4.280.0130.07719.58
5.4.270.0030.07019.59
5.4.260.0100.07019.73
5.4.250.0030.08019.68
5.4.240.0030.08019.79
5.4.230.0100.03319.68
5.4.220.0070.03719.76
5.4.210.0070.03319.75
5.4.200.0130.03019.77
5.4.190.0030.04019.84
5.4.180.0030.04019.75
5.4.170.0070.03719.68
5.4.160.0070.03719.74
5.4.150.0030.03319.74
5.4.140.0000.03317.22
5.4.130.0070.03717.02
5.4.120.0070.03317.12
5.4.110.0070.03717.09
5.4.100.0030.03717.30
5.4.90.0070.03317.12
5.4.80.0170.02717.20
5.4.70.0030.03717.08
5.4.60.0000.04017.25
5.4.50.0030.07017.10
5.4.40.0000.04317.13
5.4.30.0130.02717.20
5.4.20.0000.03717.04
5.4.10.0030.03717.14
5.4.00.0000.04016.54
5.3.290.0170.03715.43
5.3.280.0070.03715.37
5.3.270.0000.04715.45
5.3.260.0000.04315.41
5.3.250.0000.04015.32
5.3.240.0030.03015.32
5.3.230.0030.03715.34
5.3.220.0070.02715.47
5.3.210.0000.04315.47
5.3.200.0030.05315.42
5.3.190.0000.04715.31
5.3.180.0070.03315.38
5.3.170.0000.05015.28
5.3.160.0030.04015.37
5.3.150.0100.03015.43
5.3.140.0100.03315.27
5.3.130.0000.04315.31
5.3.120.0070.03715.37
5.3.110.0070.03315.40
5.3.100.0070.03314.89
5.3.90.0000.03314.93
5.3.80.0000.03714.81
5.3.70.0130.02714.92
5.3.60.0000.03314.77
5.3.50.0030.03714.64
5.3.40.0030.03314.84
5.3.30.0070.03314.74
5.3.20.0000.03314.41
5.3.10.0030.07714.47
5.3.00.0100.06714.49
5.2.170.0030.03011.70
5.2.160.0070.02711.61
5.2.150.0030.03011.81
5.2.140.0070.02011.59
5.2.130.0070.02311.73
5.2.120.0000.03011.76
5.2.110.0030.03011.57
5.2.100.0100.05311.64
5.2.90.0030.04711.57
5.2.80.0070.06311.69
5.2.70.0000.07011.54
5.2.60.0030.06711.45
5.2.50.0100.06311.50
5.2.40.0030.06011.58
5.2.30.0030.04711.57
5.2.20.0000.03711.51
5.2.10.0100.05011.38
5.2.00.0100.05311.36
5.1.60.0000.05010.77
5.1.50.0130.04710.80
5.1.40.0030.05011.02
5.1.30.0000.05711.16
5.1.20.0100.05311.40
5.1.10.0070.04710.99
5.1.00.0070.02710.09
5.0.50.0030.0478.71
5.0.40.0100.0278.71
5.0.30.0100.0538.71
5.0.20.0000.0338.71
5.0.10.0030.0438.71
5.0.00.0030.0638.71
4.4.90.0000.0308.71
4.4.80.0030.0178.71
4.4.70.0000.0338.71
4.4.60.0030.0308.71
4.4.50.0030.0338.71
4.4.40.0070.0508.71
4.4.30.0000.0208.71
4.4.20.0030.0308.71
4.4.10.0100.0278.71
4.4.00.0030.0538.71
4.3.110.0030.0138.71
4.3.100.0070.0208.71
4.3.90.0030.0338.71
4.3.80.0030.0438.71
4.3.70.0070.0138.71
4.3.60.0000.0208.71
4.3.50.0000.0308.71
4.3.40.0070.0238.71
4.3.30.0000.0378.71
4.3.20.0030.0338.71
4.3.10.0000.0308.71
4.3.00.0000.0338.71

preferences:
36.32 ms | 401 KiB | 5 Q