3v4l.org

run code in 300+ PHP versions simultaneously
<?php $classmap1 = array(); for ($i=1; $i<=10; $i++) { $classmap1['a'.$i] = $i+1; } $classmap2 = array(); for ($i=1; $i<=10; $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); $am = amerge($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)
7.3.10.0000.01616.45
7.3.00.0060.00616.70
7.2.130.0030.00617.10
7.2.120.0000.01016.90
7.2.110.0040.00816.84
7.2.100.0070.01016.95
7.2.90.0070.01017.09
7.2.80.0030.00717.09
7.2.70.0100.00316.91
7.2.60.0040.01117.12
7.2.50.0070.00317.01
7.2.40.0070.00317.03
7.2.30.0060.00317.13
7.2.20.0040.01116.96
7.2.10.0060.00616.93
7.2.00.0080.00518.04
7.1.250.0070.00315.69
7.1.70.0040.00717.03
7.1.60.0070.01419.40
7.1.50.0200.01634.89
7.1.00.0000.07322.45
7.0.200.0190.00315.04
7.0.140.0000.10022.18
7.0.120.0070.07022.04
7.0.60.0000.04320.07
7.0.50.0070.08017.87
7.0.40.0230.05320.26
7.0.30.0330.07720.40
7.0.20.0300.07720.17
7.0.10.0130.06720.18
7.0.00.0370.04020.02
5.6.210.0070.07020.66
5.6.200.0100.07318.16
5.6.190.0370.06720.52
5.6.180.0270.08020.61
5.6.170.0270.07720.77
5.6.160.0270.07320.43
5.6.150.0300.07320.34
5.6.140.0170.07020.17
5.6.130.0200.08320.50
5.6.120.0270.06020.32
5.6.110.0230.06720.16
5.6.100.0170.04320.16
5.6.90.0230.07320.39
5.6.80.0300.05719.91
5.6.70.0270.06719.63
5.6.60.0330.07019.78
5.6.50.0330.06719.79
5.6.40.0230.04719.77
5.6.30.0170.08019.53
5.6.20.0200.07719.76
5.6.10.0230.04019.73
5.6.00.0270.07719.76
5.5.350.0300.07720.42
5.5.340.0070.08017.96
5.5.330.0270.07320.40
5.5.320.0170.04320.38
5.5.310.0200.08720.26
5.5.300.0330.07319.98
5.5.290.0270.05720.20
5.5.280.0270.07720.30
5.5.270.0270.07320.23
5.5.260.0200.04020.11
5.5.250.0200.04019.82
5.5.240.0370.06719.37
5.5.230.0270.07319.37
5.5.220.0370.06719.39
5.5.210.0230.07719.70
5.5.200.0200.06719.68
5.5.190.0170.04319.47
5.5.180.0270.07719.65
5.5.160.0270.07319.64
5.5.150.0270.07719.49
5.5.140.0230.07719.52
5.5.130.0300.05019.38
5.5.120.0270.05319.55
5.5.110.0170.04019.31
5.5.100.0170.06019.47
5.5.90.0230.07319.58
5.5.80.0230.03719.23
5.5.70.0200.08019.36
5.5.60.0300.06719.45
5.5.50.0100.04719.44
5.5.40.0230.05719.61
5.5.30.0170.04019.52
5.5.20.0230.03319.50
5.5.10.0130.04019.43
5.5.00.0130.04719.20
5.4.450.0200.05319.51
5.4.440.0200.06319.25
5.4.430.0300.05319.47
5.4.420.0230.08019.18
5.4.410.0230.03319.12
5.4.400.0300.06319.09
5.4.390.0200.06719.15
5.4.380.0270.07019.16
5.4.370.0200.07319.24
5.4.360.0270.06719.15
5.4.350.0200.03718.93
5.4.340.0300.06319.21
5.4.320.0170.06318.86
5.4.310.0100.04719.24
5.4.300.0270.03718.88
5.4.290.0200.05319.16
5.4.280.0170.04018.85
5.4.270.0230.03718.85
5.4.260.0270.03319.25
5.4.250.0300.05319.14
5.4.240.0270.07019.24
5.4.230.0270.06319.15
5.4.220.0200.07719.14
5.4.210.0270.04318.85
5.4.200.0400.05719.15
5.4.190.0170.03719.13
5.4.180.0270.02718.92
5.4.170.0100.04318.84
5.4.160.0200.03019.10
5.4.150.0100.04019.13
5.4.140.0100.04316.39
5.4.130.0200.04016.57
5.4.120.0070.04016.34
5.4.110.0100.03716.46
5.4.100.0130.03716.45
5.4.90.0100.03716.55
5.4.80.0230.07016.72
5.4.70.0070.04316.71
5.4.60.0370.06716.39
5.4.50.0170.03716.69
5.4.40.0170.04016.27
5.4.30.0070.04016.64
5.4.20.0170.03316.40
5.4.10.0100.04016.44
5.4.00.0100.03715.98
5.3.290.0100.05014.84
5.3.280.0270.06714.67
5.3.270.0130.04314.62
5.3.260.0130.03714.63
5.3.250.0230.02714.67
5.3.240.0170.03314.67
5.3.230.0170.03314.68
5.3.220.0170.03314.63
5.3.210.0100.04014.58
5.3.200.0100.04714.58
5.3.190.0170.03714.50
5.3.180.0200.06714.73
5.3.170.0200.03714.65
5.3.160.0100.07714.59
5.3.150.0170.03314.59
5.3.140.0200.03714.51
5.3.130.0130.03714.55
5.3.120.0070.04314.61
5.3.110.0170.03314.56
5.3.100.0170.03314.10
5.3.90.0170.03314.06
5.3.80.0100.03714.06
5.3.70.0170.04014.00
5.3.60.0170.03013.90
5.3.50.0170.03713.85
5.3.40.0100.04314.04
5.3.30.0100.03713.93
5.3.20.0230.02313.71
5.3.10.0170.03313.67
5.3.00.0070.04013.72
5.2.170.0130.02712.21
5.2.160.0070.03312.21
5.2.150.0100.03012.21
5.2.140.0130.03012.21
5.2.130.0100.02712.21
5.2.120.0100.02712.21
5.2.110.0130.02312.21
5.2.100.0030.03312.21
5.2.90.0100.02712.21
5.2.80.0070.03312.21
5.2.70.0070.03312.21
5.2.60.0130.04312.21
5.2.50.0270.04012.21
5.2.40.0170.06012.21
5.2.30.0170.05712.21
5.2.20.0270.04712.21
5.2.10.0170.05712.21
5.2.00.0170.06312.21
5.1.60.0130.05312.21
5.1.50.0200.05012.21
5.1.40.0230.04312.21
5.1.30.0170.03312.21
5.1.20.0100.04012.21
5.1.10.0130.05312.21
5.1.00.0270.04312.21
5.0.50.0070.04312.21
5.0.40.0070.04312.21
5.0.30.0100.06712.21
5.0.20.0070.04312.21
5.0.10.0100.03312.21
5.0.00.0100.03712.21
4.4.90.0030.01712.21
4.4.80.0100.03312.21
4.4.70.0070.01712.21
4.4.60.0070.01712.21
4.4.50.0070.04012.21
4.4.40.0030.05012.21
4.4.30.0170.02012.21
4.4.20.0100.03312.21
4.4.10.0070.03312.21
4.4.00.0030.03712.21
4.3.110.0070.03712.21
4.3.100.0070.03712.21
4.3.90.0070.03312.21
4.3.80.0070.03012.21
4.3.70.0070.02012.21
4.3.60.0100.03312.21
4.3.50.0130.01312.21
4.3.40.0100.03312.21
4.3.30.0030.02312.21
4.3.20.0000.04012.21
4.3.10.0030.02312.21
4.3.00.0000.03312.21

preferences:
41.19 ms | 401 KiB | 5 Q