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) { $a[$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)
7.2.00.0040.01423.54
7.1.70.0050.00521.22
7.1.60.0000.03121.29
7.1.50.0060.00920.62
7.1.00.0100.03026.39
7.0.200.0040.00820.86
7.0.140.0030.08026.01
7.0.100.0170.05023.34
7.0.90.0800.08723.43
7.0.80.0930.07323.32
7.0.70.0100.09323.34
7.0.60.0130.07323.39
7.0.50.0070.09023.85
7.0.40.0070.07720.06
7.0.30.0000.09719.94
7.0.20.0130.07320.15
7.0.10.0130.08019.95
7.0.00.0170.07720.04
5.6.280.0000.09328.07
5.6.250.0070.09327.69
5.6.240.0130.08727.94
5.6.230.0170.08727.83
5.6.220.0170.09027.67
5.6.210.0030.07027.74
5.6.200.0130.09028.24
5.6.190.0170.08728.39
5.6.180.0070.10028.26
5.6.170.0170.08028.25
5.6.160.0130.08728.28
5.6.150.0100.09728.18
5.6.140.0100.10028.36
5.6.130.0170.09328.30
5.6.120.0170.09328.25
5.6.110.0100.08728.28
5.6.100.0200.08728.39
5.6.90.0130.10028.23
5.6.80.0030.09027.79
5.6.70.0200.08327.68
5.6.60.0170.08327.61
5.6.50.0100.08727.56
5.6.40.0230.08727.64
5.6.30.0030.06327.52
5.6.20.0100.05027.63
5.6.10.0070.05027.52
5.6.00.0100.04727.65
5.5.380.0170.08327.64
5.5.370.0100.10027.75
5.5.360.0030.09727.47
5.5.350.0130.09727.64
5.5.340.0270.06728.13
5.5.330.0130.09728.13
5.5.320.0130.09728.15
5.5.310.0130.09028.05
5.5.300.0200.05728.11
5.5.290.0100.08728.14
5.5.280.0070.10028.05
5.5.270.0100.10028.12
5.5.260.0130.10028.02
5.5.250.0200.08727.88
5.5.240.0100.09727.53
5.5.230.0130.09327.49
5.5.220.0170.08027.53
5.5.210.0070.09027.44
5.5.200.0130.09027.38
5.5.190.0070.04727.40
5.5.180.0100.04727.38
5.5.160.0100.04327.48
5.5.150.0070.04727.43
5.5.140.0170.03727.48
5.5.130.0070.05027.45
5.5.120.0130.05027.41
5.5.110.0070.08327.47
5.5.100.0130.07727.30
5.5.90.0130.04327.16
5.5.80.0070.08027.29
5.5.70.0130.06727.37
5.5.60.0030.05327.28
5.5.50.0170.06027.31
5.5.40.0100.05027.33
5.5.30.0030.05327.38
5.5.20.0130.07027.37
5.5.10.0030.07327.34
5.5.00.0030.05027.30
5.4.450.0170.08726.55
5.4.440.0100.09026.54
5.4.430.0100.09326.53
5.4.420.0130.09026.48
5.4.410.0270.07726.21
5.4.400.0100.10026.20
5.4.390.0000.08726.21
5.4.380.0200.08726.05
5.4.370.0030.07326.19
5.4.360.0270.08726.25
5.4.350.0070.09326.21
5.4.340.0100.05326.15
5.4.320.0100.05026.20
5.4.310.0030.05026.22
5.4.300.0030.05026.27
5.4.290.0100.04726.05
5.4.280.0070.04726.14
5.4.270.0030.05026.25
5.4.260.0100.08326.26
5.4.250.0070.04326.18
5.4.240.0100.09026.27
5.4.230.0070.06326.27
5.4.220.0170.05026.20
5.4.210.0100.06026.04
5.4.200.0130.04326.02
5.4.190.0100.07026.16
5.4.180.0130.05726.07
5.4.170.0100.04726.27
5.4.160.0030.05326.20
5.4.150.0100.06326.17
5.4.140.0200.03323.54
5.4.130.0130.03723.52
5.4.120.0200.03323.48
5.4.110.0100.04023.60
5.4.100.0030.05023.59
5.4.90.0070.05023.53
5.4.80.0030.05723.50
5.4.70.0070.04723.53
5.4.60.0100.04723.59
5.4.50.0130.08723.68
5.4.40.0130.09023.52
5.4.30.0200.07323.67
5.4.20.0170.08023.60
5.4.10.0170.08323.67
5.4.00.0070.09323.05
5.3.290.0070.05321.84
5.3.280.0070.05321.75
5.3.270.0070.04721.56
5.3.260.0070.08321.71
5.3.250.0100.04321.68
5.3.240.0100.05021.75
5.3.230.0070.04721.63
5.3.220.0170.04721.55
5.3.210.0030.05021.56
5.3.200.0030.04721.65
5.3.190.0000.05321.70
5.3.180.0000.05321.63
5.3.170.0000.06321.73
5.3.160.0130.03721.54
5.3.150.0030.09321.74
5.3.140.0200.05021.65
5.3.130.0100.06721.61
5.3.120.0130.08721.60
5.3.110.0070.08721.53
5.3.100.0170.09321.19
5.3.90.0130.08321.00
5.3.80.0070.06721.07
5.3.70.0070.06021.01
5.3.60.0170.06321.06
5.3.50.0130.06720.93
5.3.40.0070.08720.95
5.3.30.0130.09721.02
5.3.20.0030.07320.68
5.3.10.0130.05720.62
5.3.00.0070.07020.49
5.2.170.0130.07319.41
5.2.160.0070.08719.38
5.2.150.0170.07719.43
5.2.140.0100.08319.38
5.2.130.0070.08719.31
5.2.120.0130.08319.38
5.2.110.0070.08019.36
5.2.100.0070.08019.21
5.2.90.0200.07019.39
5.2.80.0070.07719.17
5.2.70.0070.09019.36
5.2.60.0030.05719.21
5.2.50.0030.08718.68
5.2.40.0030.05018.68
5.2.30.0130.08018.69
5.2.20.0100.08018.71
5.2.10.0100.05018.65
5.2.00.0100.08019.53
5.1.60.0170.07320.51
5.1.50.0070.07020.51
5.1.40.0100.06320.58
5.1.30.0100.08720.72
5.1.20.0070.09020.95
5.1.10.0130.04320.68
5.1.00.0070.06020.45
5.0.50.0100.02012.14
5.0.40.0000.02712.14
5.0.30.0100.06312.14
5.0.20.0030.04012.14
5.0.10.0070.04012.14
5.0.00.0070.05712.14
4.4.90.0070.03312.14
4.4.80.0070.03312.14
4.4.70.0070.03312.14
4.4.60.0000.03312.14
4.4.50.0100.02712.14
4.4.40.0070.03312.14
4.4.30.0030.03312.14
4.4.20.0000.03712.14
4.4.10.0000.03712.14
4.4.00.0030.05312.14
4.3.110.0000.03712.14
4.3.100.0000.03712.14
4.3.90.0030.01712.14
4.3.80.0000.03312.14
4.3.70.0000.03312.14
4.3.60.0030.03012.14
4.3.50.0000.01712.14
4.3.40.0070.03012.14
4.3.30.0070.03012.14
4.3.20.0000.03312.14
4.3.10.0000.03712.14
4.3.00.0000.03712.14

preferences:
34.89 ms | 401 KiB | 5 Q