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); function amerge(array $a, array $b) { foreach ($b as $key => $value) { if (array_key_exists($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; } $startTimeForeach = microtime(true); amerge($classmap1, $classmap2); $endTimeForeach = microtime(true); echo "Merging took " . (($endTimeMerge - $startTimeMerge)*1000) ." microseconds<br />\n"; echo "Foreach took " . (($endTimeForeach - $startTimeForeach)*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)
5.6.280.0170.08029.08
5.6.250.0030.10728.88
5.6.240.0130.09328.86
5.6.230.0100.09328.91
5.6.220.0100.09328.93
5.6.210.0100.08329.00
5.6.200.0130.10029.39
5.6.190.0100.09329.42
5.6.180.0170.08029.21
5.6.170.0230.09029.29
5.6.160.0130.09329.43
5.6.150.0070.10029.39
5.6.140.0170.08729.31
5.6.130.0270.08029.39
5.6.120.0130.08329.29
5.6.110.0100.10329.36
5.6.100.0170.09029.38
5.6.90.0100.08729.41
5.6.80.0100.10028.58
5.6.70.0130.09028.68
5.6.60.0170.09028.63
5.6.50.0130.07728.70
5.6.40.0170.07028.71
5.6.30.0170.07328.72
5.6.20.0230.07728.56
5.6.10.0000.10328.77
5.6.00.0230.07028.50
5.5.380.0170.10028.70
5.5.370.0100.07028.81
5.5.360.0070.10028.64
5.5.350.0100.10728.57
5.5.340.0170.08029.06
5.5.330.0270.08029.17
5.5.320.0130.09729.17
5.5.310.0130.08029.09
5.5.300.0270.06029.02
5.5.290.0200.09729.16
5.5.280.0130.06029.11
5.5.270.0070.06729.00
5.5.260.0070.09728.88
5.5.250.0130.09328.82
5.5.240.0100.09028.56
5.5.230.0200.07728.39
5.5.220.0130.08328.45
5.5.210.0130.09328.39
5.5.200.0230.08028.51
5.5.190.0130.09728.41
5.5.180.0070.09728.41
5.5.160.0170.09028.39
5.5.150.0230.07728.50
5.5.140.0270.07728.46
5.5.130.0170.09328.38
5.5.120.0100.08728.52
5.5.110.0200.08728.43
5.5.100.0200.05328.30
5.5.90.0100.09028.38
5.5.80.0130.08728.19
5.5.70.0130.08728.36
5.5.60.0100.09728.25
5.5.50.0070.09028.23
5.5.40.0100.09728.04
5.5.30.0170.11028.16
5.5.20.0130.08728.19
5.5.10.0070.09328.12
5.5.00.0200.07028.13
5.4.450.0100.06727.36
5.4.440.0170.09727.27
5.4.430.0100.08327.22
5.4.420.0100.08727.54
5.4.410.0070.09727.41
5.4.400.0170.08727.04
5.4.390.0170.09326.89
5.4.380.0100.09327.05
5.4.370.0000.10326.87
5.4.360.0100.10327.06
5.4.350.0170.09326.96
5.4.340.0170.08327.03
5.4.320.0200.08727.22
5.4.310.0230.07027.05
5.4.300.0130.08726.87
5.4.290.0030.09726.90
5.4.280.0100.06326.86
5.4.270.0070.10026.86
5.4.260.0130.09027.04
5.4.250.0130.09327.13
5.4.240.0100.09027.09
5.4.230.0000.09327.18
5.4.220.0100.09326.86
5.4.210.0170.06727.09
5.4.200.0270.05327.02
5.4.190.0170.08326.99
5.4.180.0170.09327.03
5.4.170.0130.06326.85
5.4.160.0130.08027.11
5.4.150.0170.09326.95
5.4.140.0130.08324.38
5.4.130.0100.05724.48
5.4.120.0070.08724.50
5.4.110.0230.08024.40
5.4.100.0070.09024.51
5.4.90.0130.08324.55
5.4.80.0170.09024.42
5.4.70.0230.08324.32
5.4.60.0170.09024.45
5.4.50.0200.07724.30
5.4.40.0070.09024.35
5.4.30.0170.08724.37
5.4.20.0130.08024.40
5.4.10.0200.08324.38
5.4.00.0070.09723.83
5.3.290.0170.08322.42
5.3.280.0130.09022.46
5.3.270.0100.09322.52
5.3.260.0130.08322.52
5.3.250.0130.08722.50
5.3.240.0170.09022.42
5.3.230.0130.08322.42
5.3.220.0130.09322.46
5.3.210.0270.08322.48
5.3.200.0030.09722.48
5.3.190.0070.10022.42
5.3.180.0200.08022.39
5.3.170.0070.08722.48
5.3.160.0130.08722.50
5.3.150.0130.09022.39
5.3.140.0130.06722.30
5.3.130.0230.08322.45
5.3.120.0070.10022.47
5.3.110.0030.07322.30
5.3.100.0130.09022.00
5.3.90.0070.07021.78
5.3.80.0070.09321.75
5.3.70.0030.08721.71
5.3.60.0030.09321.83
5.3.50.0030.09321.81
5.3.40.0070.10021.73
5.3.30.0100.09021.66
5.3.20.0130.09321.52
5.3.10.0100.08721.43
5.3.00.0100.08721.34
5.2.170.0100.03311.26
5.2.160.0070.05711.27
5.2.150.0070.05711.27
5.2.140.0030.06311.00
5.2.130.0100.05711.14
5.2.120.0070.06311.17
5.2.110.0070.05711.00
5.2.100.0030.06011.17
5.2.90.0070.05711.14
5.2.80.0100.06010.96
5.2.70.0070.03011.20
5.2.60.0030.06011.13
5.2.50.0100.03311.08
5.2.40.0070.06010.99
5.2.30.0100.05311.11
5.2.20.0030.05710.88
5.2.10.0030.04710.99
5.2.00.0000.03710.71
5.1.60.0070.05010.07
5.1.50.0000.02710.09
5.1.40.0070.02310.07
5.1.30.0070.03310.21
5.1.20.0000.04310.43
5.1.10.0070.02010.11
5.1.00.0030.03010.07
5.0.50.0000.02310.07
5.0.40.0030.01710.07
5.0.30.0000.03710.07
5.0.20.0000.02010.07
5.0.10.0000.02010.07
5.0.00.0000.03010.07
4.4.90.0030.03710.07
4.4.80.0070.02710.07
4.4.70.0000.04010.07
4.4.60.0000.03310.07
4.4.50.0030.01710.07
4.4.40.0030.02310.07
4.4.30.0000.02010.07
4.4.20.0000.01710.07
4.4.10.0000.01710.07
4.4.00.0000.02710.07
4.3.110.0000.01710.07
4.3.100.0030.01310.07
4.3.90.0000.01710.07
4.3.80.0000.02310.07
4.3.70.0000.01310.07
4.3.60.0000.01710.07
4.3.50.0000.01310.07
4.3.40.0000.02010.07
4.3.30.0030.01310.07
4.3.20.0000.01710.07
4.3.10.0000.01710.07
4.3.00.0030.01010.07

preferences:
142.06 ms | 1386 KiB | 7 Q