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; } $endTimeForeach = microtime(true); function amerge(array &$a, array $b) { foreach ($b as $key => $value) { $a[$key] = $value; } return $a; } $startTimeFunc = microtime(true); amerge($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)
7.3.10.0080.00416.67
7.3.00.0100.00316.63
7.2.130.0000.01016.98
7.2.120.0060.00317.04
7.2.110.0060.00617.00
7.2.100.0100.00317.03
7.2.90.0040.00917.13
7.2.80.0000.01117.09
7.2.70.0060.00616.75
7.2.60.0030.00916.99
7.2.50.0000.01716.98
7.2.40.0000.01116.79
7.2.30.0080.00417.05
7.2.20.0000.01117.03
7.2.10.0060.01016.92
7.2.00.0050.00918.31
7.1.250.0030.00715.68
7.1.70.0060.00317.19
7.1.60.0030.02019.32
7.1.50.0080.01216.74
7.1.00.0000.03722.45
7.0.200.0000.00716.89
7.0.140.0000.08021.99
7.0.100.0130.04019.91
7.0.90.0070.04719.94
7.0.80.0070.08019.95
7.0.70.0000.07019.99
7.0.60.0170.07720.10
7.0.50.0170.04020.41
7.0.40.0070.05320.07
7.0.30.0070.08020.05
7.0.20.0270.06720.11
7.0.10.0200.06020.07
7.0.00.0070.08720.10
5.6.280.0000.07321.16
5.6.250.0000.06320.60
5.6.240.0030.04020.67
5.6.230.0000.05720.63
5.6.220.0070.07720.77
5.6.210.0100.07720.79
5.6.200.0130.08021.14
5.6.190.0130.07021.07
5.6.180.0100.04321.11
5.6.170.0100.07021.11
5.6.160.0170.07321.07
5.6.150.0130.06721.14
5.6.140.0070.08321.16
5.6.130.0070.09021.16
5.6.120.0130.07321.12
5.6.110.0100.08020.96
5.6.100.0100.08021.04
5.6.90.0170.06321.06
5.6.80.0100.04320.45
5.6.70.0100.04320.50
5.6.60.0170.06720.45
5.6.50.0100.06320.46
5.6.40.0100.07720.43
5.6.30.0100.08020.56
5.6.20.0030.08020.45
5.6.10.0130.05720.45
5.6.00.0000.08720.39
5.5.380.0070.04020.39
5.5.370.0100.07720.45
5.5.360.0130.07720.54
5.5.350.0030.07720.39
5.5.340.0170.05020.90
5.5.330.0200.06720.93
5.5.320.0170.06720.81
5.5.310.0100.04720.82
5.5.300.0000.07720.84
5.5.290.0070.06320.83
5.5.280.0130.07720.87
5.5.270.0100.07020.86
5.5.260.0130.07020.89
5.5.250.0100.08020.57
5.5.240.0070.08320.25
5.5.230.0070.07720.18
5.5.220.0100.06720.32
5.5.210.0030.08020.22
5.5.200.0100.08020.28
5.5.190.0000.05320.16
5.5.180.0100.08020.25
5.5.160.0000.05320.21
5.5.150.0000.07020.18
5.5.140.0000.04320.18
5.5.130.0000.06720.29
5.5.120.0230.03020.27
5.5.110.0100.07020.19
5.5.100.0100.08020.17
5.5.90.0030.08719.98
5.5.80.0070.07020.01
5.5.70.0100.06720.12
5.5.60.0130.05320.09
5.5.50.0100.04020.16
5.5.40.0230.06019.94
5.5.30.0100.07320.13
5.5.20.0100.03720.11
5.5.10.0130.07020.14
5.5.00.0100.07020.14
5.4.450.0030.07719.46
5.4.440.0030.05019.36
5.4.430.0130.03719.41
5.4.420.0100.07719.36
5.4.410.0170.07019.23
5.4.400.0030.05718.93
5.4.390.0030.07719.21
5.4.380.0030.04019.14
5.4.370.0030.06019.05
5.4.360.0100.07319.14
5.4.350.0030.07719.05
5.4.340.0100.07319.04
5.4.320.0030.08718.95
5.4.310.0100.06718.88
5.4.300.0030.05019.18
5.4.290.0130.07019.04
5.4.280.0100.07318.88
5.4.270.0000.08019.02
5.4.260.0130.05719.23
5.4.250.0030.06719.08
5.4.240.0130.06319.23
5.4.230.0030.06319.03
5.4.220.0070.04318.87
5.4.210.0100.07318.94
5.4.200.0030.07719.16
5.4.190.0170.06719.22
5.4.180.0070.08019.22
5.4.170.0030.04318.89
5.4.160.0100.07319.14
5.4.150.0000.06319.12
5.4.140.0030.06716.39
5.4.130.0030.06716.50
5.4.120.0100.06316.50
5.4.110.0070.07016.34
5.4.100.0070.03716.40
5.4.90.0170.06016.39
5.4.80.0070.04016.55
5.4.70.0030.07316.43
5.4.60.0100.07016.56
5.4.50.0130.06016.36
5.4.40.0100.07016.52
5.4.30.0070.07316.34
5.4.20.0070.04316.52
5.4.10.0000.04016.38
5.4.00.0100.03315.91
5.3.290.0100.04315.58
5.3.280.0030.07715.58
5.3.270.0100.06715.58
5.3.260.0100.07715.58
5.3.250.0030.05015.58
5.3.240.0070.07315.58
5.3.230.0000.07315.58
5.3.220.0200.06015.58
5.3.210.0100.04315.58
5.3.200.0030.08015.58
5.3.190.0130.07015.58
5.3.180.0100.07015.58
5.3.170.0030.08015.58
5.3.160.0070.07315.58
5.3.150.0070.05715.58
5.3.140.0100.03715.58
5.3.130.0130.06715.58
5.3.120.0170.06715.58
5.3.110.0100.06715.58
5.3.100.0070.08015.58
5.3.90.0100.04015.58
5.3.80.0030.08015.58
5.3.70.0130.04015.58
5.3.60.0070.06715.58
5.3.50.0200.06015.58
5.3.40.0070.04015.58
5.3.30.0100.07315.58
5.3.20.0030.04315.58
5.3.10.0000.05715.58
5.3.00.0100.07015.58
5.2.170.0030.03715.58
5.2.160.0070.05715.58
5.2.150.0070.03315.58
5.2.140.0030.03315.58
5.2.130.0070.06015.58
5.2.120.0130.05015.58
5.2.110.0070.02715.58
5.2.100.0030.03315.58
5.2.90.0030.05315.58
5.2.80.0100.04715.58
5.2.70.0030.04315.58
5.2.60.0070.05015.58
5.2.50.0070.06315.58
5.2.40.0030.06315.58
5.2.30.0100.05015.58
5.2.20.0100.02715.58
5.2.10.0030.02715.58
5.2.00.0000.05315.58
5.1.60.0000.03715.58
5.1.50.0100.02315.58
5.1.40.0000.03715.58
5.1.30.0030.04715.58
5.1.20.0030.04015.58
5.1.10.0000.04315.58
5.1.00.0100.05015.58
5.0.50.0130.03715.58
5.0.40.0000.04715.58
5.0.30.0070.05315.58
5.0.20.0000.04715.58
5.0.10.0000.05015.58
5.0.00.0100.03715.58
4.4.90.0130.02015.58
4.4.80.0000.03315.58
4.4.70.0070.03315.58
4.4.60.0070.03015.58
4.4.50.0000.02715.58
4.4.40.0030.05315.58
4.4.30.0030.03715.58
4.4.20.0000.03715.58
4.4.10.0070.03015.58
4.4.00.0030.05715.58
4.3.110.0030.03715.58
4.3.100.0000.03315.58
4.3.90.0000.02715.58
4.3.80.0030.04715.58
4.3.70.0030.02015.58
4.3.60.0000.03715.58
4.3.50.0030.03715.58
4.3.40.0000.05015.58
4.3.30.0030.03715.58
4.3.20.0000.02015.58
4.3.10.0030.03015.58
4.3.00.0000.02315.58

preferences:
32.73 ms | 401 KiB | 5 Q