3v4l.org

run code in 300+ PHP versions simultaneously
<?php $classmap1 = array(); for ($i=1; $i<=10000; $i++) { $classmap1['a'.$i] = $i+1; } $classmap2 = array(); for ($i=1; $i<=10000; $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, $performance = false) { foreach ($b as $key => $value) { if ($performance == false && array_key_exists($key, $a)) { if (is_int($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; } $startTimeFunc = microtime(true); amerge($classmap1, $classmap2, true); $endTimeFunc = microtime(true); echo "Merging took " . (($endTimeMerge - $startTimeMerge)*1000) ." microseconds<br />\n"; echo "Foreach took " . (($endTimeForeach - $startTimeForeach)*1000) ." microseconds<br />\n"; echo "Func took " . (($endTimeFunc - $startTimeFunc)*1000) ." microseconds<br />\n";

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)
5.6.280.0070.09330.19
5.6.250.0070.09729.95
5.6.240.0100.10030.04
5.6.230.0130.05030.07
5.6.220.0030.06329.96
5.6.210.0100.10330.04
5.6.200.0200.06330.29
5.6.190.0100.06330.24
5.6.180.0070.08330.43
5.6.170.0170.08330.29
5.6.160.0170.09330.25
5.6.150.0100.08730.34
5.6.140.0100.08330.37
5.6.130.0100.10730.37
5.6.120.0070.09030.42
5.6.110.0130.08730.30
5.6.100.0200.06030.30
5.6.90.0070.12730.22
5.6.80.0030.10029.63
5.6.70.0230.07329.75
5.6.60.0070.08029.83
5.6.50.0100.07729.78
5.6.40.0130.07729.75
5.6.30.0130.05729.65
5.6.20.0200.09029.60
5.6.10.0100.10029.74
5.6.00.0070.10329.74
5.5.380.0030.10329.64
5.5.370.0100.10029.68
5.5.360.0070.07029.70
5.5.350.0070.07329.66
5.5.340.0100.07330.07
5.5.330.0130.08030.02
5.5.320.0130.09330.16
5.5.310.0070.09030.18
5.5.300.0100.10030.08
5.5.290.0130.09730.05
5.5.280.0130.04730.07
5.5.270.0100.10329.92
5.5.260.0030.10330.07
5.5.250.0170.05729.96
5.5.240.0030.10729.55
5.5.230.0100.08729.60
5.5.220.0070.06029.50
5.5.210.0170.04329.45
5.5.200.0270.06729.57
5.5.190.0170.05329.43
5.5.180.0170.09729.52
5.5.160.0100.09729.54
5.5.150.0130.09729.54
5.5.140.0130.07029.54
5.5.130.0130.08729.44
5.5.120.0030.10729.53
5.5.110.0170.08329.46
5.5.100.0130.06029.34
5.5.90.0070.08029.33
5.5.80.0070.07729.36
5.5.70.0030.10029.34
5.5.60.0070.09029.42
5.5.50.0030.10729.21
5.5.40.0070.09329.19
5.5.30.0170.09729.04
5.5.20.0100.09029.15
5.5.10.0070.08329.20
5.5.00.0070.10329.21
5.4.450.0030.10028.37
5.4.440.0170.07728.42
5.4.430.0070.09328.48
5.4.420.0100.10028.47
5.4.410.0070.05328.33
5.4.400.0000.06028.11
5.4.390.0130.08727.93
5.4.380.0100.09728.08
5.4.370.0100.09028.10
5.4.360.0030.07028.16
5.4.350.0130.09728.25
5.4.340.0200.05027.98
5.4.320.0130.09028.16
5.4.310.0170.09727.99
5.4.300.0070.06028.14
5.4.290.0170.09328.03
5.4.280.0000.07328.14
5.4.270.0100.05727.99
5.4.260.0070.05728.10
5.4.250.0070.09328.06
5.4.240.0000.09328.10
5.4.230.0030.05328.09
5.4.220.0070.07728.13
5.4.210.0130.07728.06
5.4.200.0170.08028.05
5.4.190.0000.06728.29
5.4.180.0070.06028.24
5.4.170.0100.08728.06
5.4.160.0100.10027.98
5.4.150.0170.09327.88
5.4.140.0030.06725.50
5.4.130.0100.09725.58
5.4.120.0170.08725.28
5.4.110.0070.06025.59
5.4.100.0030.06025.51
5.4.90.0030.08325.56
5.4.80.0030.05325.42
5.4.70.0130.09325.54
5.4.60.0170.09725.48
5.4.50.0100.09325.52
5.4.40.0100.07725.60
5.4.30.0000.09325.45
5.4.20.0170.09025.34
5.4.10.0130.05325.37
5.4.00.0130.08724.87
5.3.290.0070.09023.89
5.3.280.0030.05723.79
5.3.270.0130.09323.66
5.3.260.0200.07323.71
5.3.250.0130.10023.81
5.3.240.0070.07323.80
5.3.230.0170.08723.82
5.3.220.0130.09023.74
5.3.210.0200.08023.66
5.3.200.0130.07723.71
5.3.190.0230.08723.79
5.3.180.0130.08323.62
5.3.170.0130.08723.62
5.3.160.0170.08323.70
5.3.150.0170.09023.64
5.3.140.0100.06023.74
5.3.130.0070.09323.74
5.3.120.0100.09723.75
5.3.110.0070.05723.75
5.3.100.0100.10023.20
5.3.90.0070.09323.21
5.3.80.0130.08723.20
5.3.70.0230.09023.19
5.3.60.0070.12023.10
5.3.50.0070.08723.07
5.3.40.0100.09723.09
5.3.30.0100.08723.09
5.3.20.0030.08022.79
5.3.10.0070.09022.69
5.3.00.0100.09722.47
5.2.170.0030.05715.57
5.2.160.0100.03015.57
5.2.150.0030.06315.57
5.2.140.0100.05715.57
5.2.130.0070.05315.57
5.2.120.0070.06015.57
5.2.110.0030.03715.57
5.2.100.0170.05315.57
5.2.90.0030.05715.57
5.2.80.0070.02715.57
5.2.70.0070.05315.57
5.2.60.0030.06015.57
5.2.50.0030.04015.57
5.2.40.0030.04315.57
5.2.30.0070.03315.57
5.2.20.0070.05715.57
5.2.10.0030.02715.57
5.2.00.0100.05715.57
5.1.60.0130.04315.57
5.1.50.0030.03715.57
5.1.40.0070.05015.57
5.1.30.0030.04015.57
5.1.20.0130.04015.57
5.1.10.0100.04715.57
5.1.00.0000.04315.57
5.0.50.0100.03315.57
5.0.40.0000.04015.57
5.0.30.0030.03715.57
5.0.20.0030.03715.57
5.0.10.0070.04015.57
5.0.00.0000.05315.57
4.4.90.0030.02715.57
4.4.80.0030.02315.57
4.4.70.0000.02015.57
4.4.60.0030.01315.57
4.4.50.0030.01315.57
4.4.40.0000.05315.57
4.4.30.0000.01715.57
4.4.20.0070.02315.57
4.4.10.0030.03715.57
4.4.00.0070.05315.57
4.3.110.0000.03315.57
4.3.100.0030.03315.57
4.3.90.0070.02715.57
4.3.80.0000.05315.57
4.3.70.0030.03315.57
4.3.60.0070.02315.57
4.3.50.0030.01315.57
4.3.40.0070.04015.57
4.3.30.0000.03715.57
4.3.20.0030.01715.57
4.3.10.0070.02315.57
4.3.00.0000.02715.57

preferences:
142.41 ms | 1386 KiB | 7 Q