3v4l.org

run code in 300+ PHP versions simultaneously
<?php $classmap1 = array(); for ($i=1; $i<=1000; $i++) { $classmap1['a'.$i] = $i+1; } $classmap2 = array(); for ($i=1; $i<=1000; $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; } $endTimeForeach = microtime(true); abstract class merging { public static function merge(array &$a, array &$b) { foreach ($b as $key => $value) { $a[$key] = $value; } return $a; } } $startTimeFunc = microtime(true); merging::merge($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)
7.4.10.0060.01115.32
7.4.00.0100.01015.28
7.3.130.0150.00415.09
7.3.120.0040.01115.25
7.3.110.0090.00914.91
7.3.100.0100.00715.16
7.3.90.0030.01315.34
7.3.80.0100.00715.12
7.3.70.0060.01315.36
7.3.60.0150.00415.27
7.3.50.0090.00315.36
7.3.40.0040.01215.07
7.3.30.0070.00715.11
7.3.20.0000.01016.83
7.3.10.0060.00716.56
7.3.00.0060.00616.68
7.2.260.0000.01915.45
7.2.250.0060.00815.43
7.2.240.0070.00715.57
7.2.230.0100.00715.37
7.2.220.0100.00315.25
7.2.210.0120.00315.08
7.2.200.0110.00815.11
7.2.190.0030.01515.48
7.2.180.0060.00615.46
7.2.170.0100.01015.21
7.2.160.0030.01415.41
7.2.150.0070.00317.04
7.2.140.0090.00616.68
7.2.130.0070.00716.75
7.2.120.0070.00317.04
7.2.110.0060.00916.98
7.2.100.0060.01017.00
7.2.90.0100.00316.95
7.2.80.0030.01217.07
7.2.70.0100.00316.98
7.2.60.0030.00616.86
7.2.50.0090.00617.03
7.2.40.0060.00917.10
7.2.30.0100.00016.96
7.2.20.0060.00916.71
7.2.10.0130.00317.04
7.2.00.0050.01218.27
7.1.330.0060.01015.82
7.1.320.0030.00915.65
7.1.310.0060.00915.81
7.1.300.0060.00315.59
7.1.290.0070.00715.63
7.1.280.0000.01915.83
7.1.270.0040.01115.78
7.1.260.0070.00715.55
7.1.250.0030.00715.96
7.1.240.0090.00615.78
7.1.230.0060.00915.60
7.1.220.0030.00615.75
7.1.210.0030.00715.97
7.1.200.0070.01015.84
7.1.190.0030.01015.82
7.1.180.0070.00315.93
7.1.170.0000.01215.76
7.1.160.0100.00715.92
7.1.150.0040.01115.88
7.1.140.0100.00616.00
7.1.130.0030.01215.88
7.1.120.0060.00615.90
7.1.110.0070.00715.58
7.1.100.0070.01016.04
7.1.90.0100.00715.71
7.1.80.0150.00015.90
7.1.70.0040.01116.55
7.1.60.0050.01417.54
7.1.50.0060.00916.29
7.1.40.0000.01315.89
7.1.30.0090.00615.83
7.1.20.0030.00915.74
7.1.10.0000.01215.54
7.1.00.0030.02219.16
7.0.330.0030.00915.61
7.0.320.0040.01115.36
7.0.310.0090.00615.54
7.0.300.0090.00615.44
7.0.290.0070.00715.07
7.0.280.0070.00715.41
7.0.270.0110.00015.26
7.0.260.0060.00915.52
7.0.250.0070.00715.65
7.0.240.0060.00915.33
7.0.230.0070.00715.40
7.0.220.0090.00615.44
7.0.210.0060.00615.48
7.0.200.0040.00816.16
7.0.190.0030.01015.48
7.0.180.0030.01015.45
7.0.170.0120.00315.52
7.0.160.0030.00915.38
7.0.150.0090.00615.43
7.0.140.0020.04518.57
7.0.130.0000.01515.53
7.0.120.0000.00915.45
7.0.110.0060.00915.46
7.0.100.0230.04317.82
7.0.90.0150.04317.89
7.0.80.0220.04317.73
7.0.70.0180.04317.90
7.0.60.0180.04617.74
7.0.50.0220.03818.09
7.0.40.0050.04516.91
7.0.30.0080.05016.81
7.0.20.0100.04416.83
7.0.10.0070.04216.88
7.0.00.0070.04516.73
5.6.400.0030.01414.93
5.6.390.0000.01415.18
5.6.380.0030.01014.93
5.6.370.0030.01015.15
5.6.360.0000.01715.11
5.6.350.0070.01314.80
5.6.340.0030.01214.74
5.6.330.0130.00615.34
5.6.320.0030.01315.01
5.6.310.0150.00315.03
5.6.300.0090.00914.77
5.6.290.0070.00715.37
5.6.280.0100.03718.26
5.6.270.0030.01415.04
5.6.260.0040.01515.23
5.6.250.0100.04018.26
5.6.240.0080.03018.24
5.6.230.0080.04318.11
5.6.220.0050.04018.02
5.6.210.0070.04218.18
5.6.200.0070.04818.41
5.6.190.0070.04518.32
5.6.180.0080.04718.36
5.6.170.0050.03218.28
5.6.160.0110.04318.29
5.6.150.0080.04418.35
5.6.140.0070.03018.42
5.6.130.0030.04718.32
5.6.120.0050.05318.21
5.6.110.0070.05018.43
5.6.100.0120.02518.34
5.6.90.0050.03118.32
5.6.80.0050.04617.85
5.6.70.0110.04217.88
5.6.60.0030.04317.93
5.6.50.0100.04117.93
5.6.40.0080.04017.89
5.6.30.0050.02717.99
5.6.20.0120.04218.01
5.6.10.0070.04817.85
5.6.00.0120.03417.99
5.5.380.0100.04818.02
5.5.370.0070.04817.91
5.5.360.0050.05017.79
5.5.350.0070.02717.98
5.5.340.0050.04618.18
5.5.330.0020.04918.23
5.5.320.0130.03818.15
5.5.310.0050.04618.32
5.5.300.0100.04518.10
5.5.290.0080.04518.10
5.5.280.0120.04018.12
5.5.270.0040.04918.13
5.5.260.0070.03618.25
5.5.250.0050.04318.17
5.5.240.0080.04318.00
5.5.230.0050.04517.71
5.5.220.0050.03317.92
5.5.210.0150.03517.87
5.5.200.0100.02617.88
5.5.190.0090.04417.96
5.5.180.0070.03817.90
5.5.170.0040.01415.13
5.5.160.0050.05117.92
5.5.150.0100.04117.70
5.5.140.0090.04417.76
5.5.130.0080.04517.78
5.5.120.0110.03817.56
5.5.110.0060.04317.87
5.5.100.0050.04517.77
5.5.90.0080.04017.75
5.5.80.0110.02217.79
5.5.70.0030.04417.82
5.5.60.0120.03217.67
5.5.50.0080.04317.66
5.5.40.0030.04817.68
5.5.30.0070.04217.77
5.5.20.0050.03317.78
5.5.10.0080.04617.63
5.5.00.0090.03517.66
5.4.450.0150.03416.60
5.4.440.0080.03816.60
5.4.430.0070.02516.44
5.4.420.0080.04116.52
5.4.410.0110.04116.49
5.4.400.0030.03616.40
5.4.390.0090.04116.36
5.4.380.0080.04316.34
5.4.370.0050.03116.36
5.4.360.0100.03816.32
5.4.350.0090.03616.36
5.4.340.0030.04416.43
5.4.330.0000.01213.23
5.4.320.0060.04316.36
5.4.310.0040.04616.45
5.4.300.0020.04416.36
5.4.290.0100.03816.29
5.4.280.0120.04016.39
5.4.270.0030.04716.29
5.4.260.0050.04216.34
5.4.250.0050.02916.27
5.4.240.0080.03716.29
5.4.230.0090.03916.37
5.4.220.0030.04816.27
5.4.210.0090.03716.29
5.4.200.0050.04016.45
5.4.190.0070.04416.36
5.4.180.0130.03716.25
5.4.170.0050.04016.29
5.4.160.0080.03516.34
5.4.150.0050.03716.38
5.4.140.0050.04415.04
5.4.130.0100.03515.09
5.4.120.0070.04015.05
5.4.110.0070.04315.06
5.4.100.0090.03515.03
5.4.90.0090.02415.07
5.4.80.0020.03115.03
5.4.70.0060.04115.05
5.4.60.0030.03915.02
5.4.50.0030.03615.04
5.4.40.0000.04615.09
5.4.30.0070.04015.09
5.4.20.0070.05015.04
5.4.10.0020.04415.08
5.4.00.0030.04714.78
5.3.290.0050.04314.35
5.3.280.0090.03514.28
5.3.270.0060.04614.23
5.3.260.0000.04514.29
5.3.250.0050.04314.26
5.3.240.0070.04414.24
5.3.230.0100.03714.26
5.3.220.0030.03014.30
5.3.210.0120.03814.27
5.3.200.0020.04314.25
5.3.190.0040.04514.26
5.3.180.0050.03214.26
5.3.170.0040.04314.23
5.3.160.0100.03814.28
5.3.150.0090.03914.29
5.3.140.0000.04914.26
5.3.130.0030.04214.28
5.3.120.0030.04514.20
5.3.110.0070.03514.30
5.3.100.0090.04214.05
5.3.90.0100.02213.94
5.3.80.0070.04213.97
5.3.70.0050.03814.00
5.3.60.0090.02813.97
5.3.50.0070.03713.91
5.3.40.0050.03413.96
5.3.30.0130.03313.92
5.3.20.0030.04413.83
5.3.10.0110.03013.76
5.3.00.0030.03813.70
5.2.170.0030.06712.09
5.2.160.0000.07012.09
5.2.150.0030.06712.09
5.2.140.0100.05712.09
5.2.130.0070.06012.09
5.2.120.0070.06012.09
5.2.110.0000.05012.09
5.2.100.0000.07312.09
5.2.90.0130.06012.09
5.2.80.0030.06712.09
5.2.70.0070.06312.09
5.2.60.0070.06312.09
5.2.50.0100.05312.09
5.2.40.0070.05712.09
5.2.30.0000.07012.09
5.2.20.0130.03712.09
5.2.10.0030.05712.09
5.2.00.0030.05312.09
5.1.60.0030.05712.09
5.1.50.0030.05312.09
5.1.40.0070.05312.09
5.1.30.0170.05012.09
5.1.20.0070.05312.09
5.1.10.0030.06012.09
5.1.00.0070.06012.09
5.0.50.0030.02312.09
5.0.40.0000.02312.09
5.0.30.0000.04312.09
5.0.20.0070.01712.09
5.0.10.0030.02012.09
5.0.00.0030.04312.09
4.4.90.0030.03012.09
4.4.80.0030.03012.09
4.4.70.0070.02312.09
4.4.60.0070.03012.09
4.4.50.0000.03712.09
4.4.40.0000.05312.09
4.4.30.0000.03712.09
4.4.20.0000.03012.09
4.4.10.0000.03012.09
4.4.00.0070.03312.09
4.3.110.0070.02012.09
4.3.100.0000.01712.09
4.3.90.0030.01312.09
4.3.80.0000.02712.09
4.3.70.0000.02312.09
4.3.60.0000.01712.09
4.3.50.0000.01712.09
4.3.40.0000.02312.09
4.3.30.0000.01712.09
4.3.20.0130.00712.09
4.3.10.0000.01712.09
4.3.00.0000.01312.09

preferences:
38.89 ms | 401 KiB | 5 Q