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 $b) { foreach ($b as $key => $value) { if (array_key_exists($key, $a)) {print 111;die; if (is_int($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); $endTimeFunc = microtime(true); echo "Merging took " . (($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)
5.6.280.0200.07328.24
5.6.250.0100.08727.95
5.6.240.0100.05027.80
5.6.230.0100.09727.76
5.6.220.0200.05327.89
5.6.210.0100.09727.70
5.6.200.0030.10028.17
5.6.190.0170.08028.25
5.6.180.0030.09328.27
5.6.170.0200.07728.27
5.6.160.0100.09328.16
5.6.150.0170.08028.31
5.6.140.0100.08028.16
5.6.130.0100.09028.31
5.6.120.0200.08328.30
5.6.110.0200.08028.24
5.6.100.0070.09728.16
5.6.90.0170.09028.29
5.6.80.0030.07327.63
5.6.70.0130.08327.54
5.6.60.0130.09027.62
5.6.50.0130.07727.68
5.6.40.0100.09327.70
5.6.30.0030.09327.53
5.6.20.0130.09027.52
5.6.10.0100.05727.63
5.6.00.0130.06027.65
5.5.380.0100.09327.65
5.5.370.0130.08027.77
5.5.360.0100.09327.66
5.5.350.0070.09727.65
5.5.340.0070.09028.06
5.5.330.0100.09328.12
5.5.320.0070.06028.16
5.5.310.0130.09328.11
5.5.300.0100.06028.12
5.5.290.0130.08728.08
5.5.280.0130.08328.01
5.5.270.0030.09328.08
5.5.260.0230.04028.05
5.5.250.0030.10027.80
5.5.240.0070.09027.54
5.5.230.0130.09327.40
5.5.220.0030.09727.41
5.5.210.0230.08027.52
5.5.200.0100.09027.50
5.5.190.0170.08327.47
5.5.180.0130.08727.31
5.5.160.0070.09327.50
5.5.150.0230.08027.43
5.5.140.0070.08727.44
5.5.130.0300.06727.34
5.5.120.0070.08727.48
5.5.110.0170.08327.50
5.5.100.0170.08027.30
5.5.90.0030.10027.32
5.5.80.0070.09327.30
5.5.70.0170.08727.23
5.5.60.0070.09027.23
5.5.50.0170.08327.16
5.5.40.0100.04727.26
5.5.30.0070.04727.19
5.5.20.0070.07027.24
5.5.10.0000.05327.29
5.5.00.0030.06027.28
5.4.450.0200.08326.75
5.4.440.0130.09026.67
5.4.430.0130.08326.34
5.4.420.0030.09326.51
5.4.410.0070.08326.29
5.4.400.0030.10326.19
5.4.390.0070.09326.19
5.4.380.0170.08726.01
5.4.370.0070.09726.02
5.4.360.0170.08726.18
5.4.350.0130.08726.21
5.4.340.0100.09326.12
5.4.320.0170.07726.11
5.4.310.0070.05326.05
5.4.300.0070.08726.15
5.4.290.0070.06026.18
5.4.280.0070.08026.37
5.4.270.0030.08726.04
5.4.260.0100.09026.02
5.4.250.0300.06726.12
5.4.240.0170.09026.19
5.4.230.0270.04326.15
5.4.220.0170.08726.34
5.4.210.0100.08726.33
5.4.200.0170.05026.20
5.4.190.0030.05726.17
5.4.180.0000.05326.14
5.4.170.0000.07026.23
5.4.160.0100.04026.18
5.4.150.0100.05026.18
5.4.140.0030.04723.59
5.4.130.0000.04723.44
5.4.120.0070.04323.61
5.4.110.0100.04023.63
5.4.100.0100.06323.66
5.4.90.0100.07723.70
5.4.80.0070.05323.69
5.4.70.0070.07723.59
5.4.60.0070.04323.50
5.4.50.0070.08723.52
5.4.40.0030.04723.63
5.4.30.0070.04323.53
5.4.20.0070.06723.50
5.4.10.0100.06323.65
5.4.00.0070.04323.00
5.3.290.0130.07721.75
5.3.280.0230.07321.70
5.3.270.0030.06321.74
5.3.260.0030.04721.56
5.3.250.0000.05721.59
5.3.240.0030.04721.72
5.3.230.0030.04721.65
5.3.220.0030.04721.72
5.3.210.0170.05721.56
5.3.200.0070.04321.71
5.3.190.0100.04021.75
5.3.180.0000.05021.57
5.3.170.0030.05021.55
5.3.160.0100.09021.59
5.3.150.0070.04721.55
5.3.140.0030.06321.66
5.3.130.0000.06321.51
5.3.120.0200.03021.71
5.3.110.0100.04021.63
5.3.100.0100.08321.12
5.3.90.0070.07321.04
5.3.80.0000.05021.03
5.3.70.0130.08321.08
5.3.60.0030.09020.92
5.3.50.0070.08720.98
5.3.40.0030.04721.09
5.3.30.0030.08320.99
5.3.20.0170.03320.75
5.3.10.0000.04720.62
5.3.00.0100.04020.46
5.2.170.0030.03311.07
5.2.160.0070.02711.17
5.2.150.0030.03311.17
5.2.140.0070.04311.16
5.2.130.0000.03011.20
5.2.120.0030.02711.00
5.2.110.0030.03011.16
5.2.100.0000.03011.13
5.2.90.0030.02711.02
5.2.80.0000.03011.24
5.2.70.0030.03010.96
5.2.60.0070.03310.98
5.2.50.0030.03011.07
5.2.40.0000.03710.90
5.2.30.0000.04711.04
5.2.20.0030.02710.97
5.2.10.0030.02710.90
5.2.00.0000.03310.71
5.1.60.0000.03010.07
5.1.50.0030.0309.88
5.1.40.0000.0239.87
5.1.30.0000.02710.33
5.1.20.0000.03310.31
5.1.10.0030.02310.09
5.1.00.0030.02710.15
5.0.50.0000.0238.93
5.0.40.0000.0208.93
5.0.30.0030.0278.93
5.0.20.0030.0178.93
5.0.10.0030.0178.93
5.0.00.0030.0308.93
4.4.90.0030.0208.93
4.4.80.0000.0138.93
4.4.70.0000.0178.93
4.4.60.0000.0178.93
4.4.50.0000.0208.93
4.4.40.0000.0238.93
4.4.30.0070.0108.93
4.4.20.0000.0178.93
4.4.10.0000.0308.93
4.4.00.0000.0238.93
4.3.110.0030.0208.93
4.3.100.0000.0208.93
4.3.90.0000.0138.93
4.3.80.0000.0238.93
4.3.70.0000.0138.93
4.3.60.0000.0178.93
4.3.50.0070.0238.93
4.3.40.0000.0308.93
4.3.30.0000.0238.93
4.3.20.0030.0308.93
4.3.10.0000.0338.93
4.3.00.0000.0208.93

preferences:
142.53 ms | 1386 KiB | 7 Q