3v4l.org

run code in 300+ PHP versions simultaneously
<?php $classmap1 = array(); for ($i=1; $i<=100; $i++) { $classmap1['a'.$i] = $i+1; } $classmap2 = array(); for ($i=1; $i<=100; $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)
7.4.00.0060.01314.95
7.3.120.0070.01114.97
7.3.110.0120.00314.59
7.3.100.0110.00314.79
7.3.90.0100.01014.99
7.3.80.0000.01514.90
7.3.70.0040.00814.86
7.3.60.0140.00314.98
7.3.50.0060.01214.98
7.3.40.0100.00314.82
7.3.30.0110.00415.10
7.3.20.0170.00016.71
7.3.10.0070.00716.54
7.3.00.0060.00916.68
7.2.250.0070.01015.23
7.2.240.0130.00714.89
7.2.230.0040.01415.02
7.2.220.0030.01015.23
7.2.210.0040.01114.89
7.2.200.0060.00314.88
7.2.190.0060.01314.90
7.2.180.0070.00715.29
7.2.170.0060.00315.09
7.2.00.0090.00319.12
7.1.330.0070.00716.03
7.1.320.0070.01015.94
7.1.310.0060.00615.89
7.1.300.0150.00015.87
7.1.290.0100.00615.88
7.1.280.0100.00315.90
7.1.270.0100.00715.58
7.1.260.0000.01415.87
7.1.70.0060.00617.21
7.1.60.0100.01419.32
7.1.50.0080.00317.05
7.1.00.0030.03322.45
7.0.200.0040.00416.64
7.0.140.0000.07722.07
7.0.100.0000.04720.00
7.0.90.0070.08319.91
7.0.80.0030.04719.88
7.0.70.0000.08319.96
7.0.60.0270.03720.08
7.0.50.0230.07720.39
7.0.40.0130.07320.14
7.0.30.0030.05020.01
7.0.20.0030.09020.13
7.0.10.0170.07720.12
7.0.00.0070.09020.09
5.6.280.0100.06721.11
5.6.250.0070.04020.75
5.6.240.0030.07720.76
5.6.230.0100.07720.70
5.6.220.0100.08020.65
5.6.210.0170.06320.70
5.6.200.0070.06021.08
5.6.190.0030.05321.03
5.6.180.0100.06321.17
5.6.170.0030.08320.97
5.6.160.0030.05321.05
5.6.150.0070.05321.21
5.6.140.0170.04321.08
5.6.130.0170.07021.14
5.6.120.0070.04021.04
5.6.110.0030.08720.96
5.6.100.0100.07721.13
5.6.90.0070.05020.96
5.6.80.0000.08020.41
5.6.70.0070.07320.36
5.6.60.0100.04720.43
5.6.50.0070.06320.35
5.6.40.0070.07720.34
5.6.30.0070.05020.50
5.6.20.0100.06720.47
5.6.10.0100.06020.52
5.6.00.0130.07320.51
5.5.380.0100.03320.55
5.5.370.0130.05720.38
5.5.360.0130.07720.45
5.5.350.0170.07020.46
5.5.340.0200.06320.93
5.5.330.0030.06020.87
5.5.320.0000.08720.91
5.5.310.0100.07320.68
5.5.300.0130.05320.80
5.5.290.0130.07720.83
5.5.280.0000.04720.77
5.5.270.0030.07720.80
5.5.260.0070.04720.89
5.5.250.0070.08320.73
5.5.240.0070.07720.25
5.5.230.0030.06320.28
5.5.220.0170.06020.14
5.5.210.0070.07720.15
5.5.200.0170.06720.28
5.5.190.0000.08020.26
5.5.180.0000.05720.27
5.5.160.0030.04020.28
5.5.150.0000.07320.31
5.5.140.0100.05720.31
5.5.130.0070.07720.12
5.5.120.0030.04020.13
5.5.110.0070.06020.17
5.5.100.0030.08020.13
5.5.90.0070.05020.20
5.5.80.0070.07320.10
5.5.70.0070.03720.19
5.5.60.0100.07320.09
5.5.50.0130.06320.13
5.5.40.0000.08020.15
5.5.30.0070.07020.18
5.5.20.0030.04720.18
5.5.10.0030.03320.09
5.5.00.0070.06320.05
5.4.450.0170.07319.54
5.4.440.0070.07019.51
5.4.430.0100.05019.30
5.4.420.0130.06019.22
5.4.410.0070.07719.12
5.4.400.0200.07018.85
5.4.390.0000.07319.05
5.4.380.0100.04719.14
5.4.370.0170.06319.13
5.4.360.0130.07018.87
5.4.350.0070.04319.04
5.4.340.0130.07018.88
5.4.320.0070.04719.12
5.4.310.0070.04019.09
5.4.300.0070.08719.16
5.4.290.0070.07019.12
5.4.280.0070.07319.04
5.4.270.0030.07719.08
5.4.260.0030.07019.12
5.4.250.0070.06319.22
5.4.240.0000.04019.16
5.4.230.0100.05719.17
5.4.220.0100.07719.04
5.4.210.0030.03719.13
5.4.200.0070.04719.20
5.4.190.0070.05018.89
5.4.180.0070.06019.18
5.4.170.0130.04319.04
5.4.160.0070.07319.20
5.4.150.0070.03319.21
5.4.140.0030.03716.53
5.4.130.0070.07016.28
5.4.120.0070.03316.48
5.4.110.0030.03016.41
5.4.100.0100.03016.49
5.4.90.0100.03016.53
5.4.80.0030.03716.48
5.4.70.0030.03016.55
5.4.60.0070.03016.45
5.4.50.0030.03016.46
5.4.40.0100.04716.49
5.4.30.0070.03016.49
5.4.20.0000.04016.49
5.4.10.0070.03316.46
5.4.00.0100.03015.82
5.3.290.0030.07014.79
5.3.280.0170.07014.63
5.3.270.0000.04014.78
5.3.260.0030.08314.66
5.3.250.0000.05014.73
5.3.240.0030.07714.71
5.3.230.0070.07714.64
5.3.220.0030.03314.59
5.3.210.0070.03314.70
5.3.200.0000.04014.63
5.3.190.0030.03014.63
5.3.180.0030.03714.77
5.3.170.0100.03314.55
5.3.160.0070.03014.70
5.3.150.0030.03014.77
5.3.140.0000.06014.60
5.3.130.0030.03714.73
5.3.120.0030.04014.59
5.3.110.0070.03714.66
5.3.100.0030.04014.17
5.3.90.0030.04314.11
5.3.80.0000.04013.98
5.3.70.0130.03014.02
5.3.60.0030.03714.00
5.3.50.0030.03013.92
5.3.40.0030.03714.14
5.3.30.0100.03013.95
5.3.20.0000.03313.74
5.3.10.0030.02713.73
5.3.00.0070.02713.75
5.2.170.0000.03311.11
5.2.160.0000.03011.11
5.2.150.0070.02011.25
5.2.140.0070.02711.31
5.2.130.0100.02711.32
5.2.120.0000.03311.10
5.2.110.0000.03011.23
5.2.100.0000.02711.20
5.2.90.0000.02711.07
5.2.80.0070.02011.08
5.2.70.0000.02711.22
5.2.60.0070.02011.13
5.2.50.0000.02711.00
5.2.40.0030.02311.14
5.2.30.0000.02711.11
5.2.20.0000.02711.06
5.2.10.0000.02711.06
5.2.00.0000.02710.87
5.1.60.0030.02310.20
5.1.50.0030.03310.18
5.1.40.0030.02710.13
5.1.30.0030.02310.37
5.1.20.0100.04010.34
5.1.10.0070.04010.19
5.1.00.0030.05710.07
5.0.50.0000.0338.78
5.0.40.0030.0338.78
5.0.30.0000.0438.78
5.0.20.0000.0278.78
5.0.10.0030.0178.78
5.0.00.0000.0578.78
4.4.90.0000.0138.78
4.4.80.0000.0138.78
4.4.70.0030.0108.78
4.4.60.0030.0108.78
4.4.50.0030.0138.78
4.4.40.0000.0238.78
4.4.30.0000.0138.78
4.4.20.0070.0338.78
4.4.10.0030.0208.78
4.4.00.0000.0338.78
4.3.110.0030.0208.78
4.3.100.0030.0338.78
4.3.90.0000.0238.78
4.3.80.0000.0308.78
4.3.70.0000.0208.78
4.3.60.0030.0138.78
4.3.50.0100.0078.78
4.3.40.0000.0338.78
4.3.30.0000.0208.78
4.3.20.0000.0178.78
4.3.10.0030.0138.78
4.3.00.0000.0138.78

preferences:
49.37 ms | 400 KiB | 5 Q