3v4l.org

run code in 300+ PHP versions simultaneously
<?php $classmap1 = array(); for ($i=1; $i<=100; $i++) { $classmap1['a'.$i] = $i+1; } $classmap2 = array(); for ($i=1; $i<=100; $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; } $endTimeForeach = microtime(true); abstract class merging { public static function amerge(array &$a, array &$b) { foreach ($b as $key => $value) { $a[$key] = $value; } return $a; } } $startTimeFunc = microtime(true); merging:amerge($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)
7.4.00.0110.00714.91
7.3.120.0080.00814.72
7.3.110.0070.01015.05
7.3.100.0060.00914.69
7.3.90.0030.01514.96
7.3.80.0060.00914.89
7.3.70.0100.00314.68
7.3.60.0030.00614.98
7.3.50.0030.00915.03
7.3.40.0100.00315.02
7.3.30.0030.00614.94
7.3.20.0090.00316.57
7.3.10.0070.00716.75
7.3.00.0070.00516.77
7.2.250.0000.01915.18
7.2.240.0000.01615.03
7.2.230.0090.00915.08
7.2.220.0110.00715.08
7.2.210.0060.01314.94
7.2.200.0040.01115.15
7.2.190.0090.00615.08
7.2.180.0060.00915.14
7.2.170.0000.01414.88
7.2.130.0040.00716.98
7.2.120.0080.00316.99
7.2.110.0100.00316.65
7.2.100.0070.00316.70
7.2.90.0030.00716.68
7.2.80.0030.00616.90
7.2.70.0040.00716.93
7.2.60.0100.00316.77
7.2.50.0060.00617.06
7.2.40.0060.00917.05
7.2.30.0040.01217.00
7.2.20.0040.00817.00
7.2.10.0060.00616.81
7.2.00.0060.00718.20
7.1.330.0070.00715.83
7.1.320.0040.01115.92
7.1.310.0060.01215.89
7.1.300.0080.00015.89
7.1.290.0080.00615.52
7.1.280.0060.00615.86
7.1.270.0030.00915.54
7.1.260.0040.01115.86
7.1.250.0070.00316.05
7.1.70.0030.00517.04
7.1.60.0130.01019.32
7.1.50.0040.01117.00
7.1.00.0000.03722.34
7.0.200.0000.00716.48
7.0.140.0170.06322.07
7.0.60.0100.03320.00
7.0.50.0170.07017.84
7.0.40.0000.05320.26
7.0.30.0230.04320.20
7.0.20.0170.07320.15
7.0.10.0070.06720.25
7.0.00.0130.06320.12
5.6.210.0100.07320.54
5.6.200.0100.04318.20
5.6.190.0100.05320.48
5.6.180.0430.07020.55
5.6.170.0170.04020.54
5.6.160.0100.04720.56
5.6.150.0030.06018.19
5.6.140.0170.07318.29
5.6.130.0130.05318.13
5.6.120.0100.06021.16
5.6.110.0100.08721.05
5.6.100.0030.04020.96
5.6.90.0130.05721.07
5.6.80.0000.07320.41
5.5.350.0370.06320.37
5.5.340.0030.04017.98
5.5.330.0130.07720.28
5.5.320.0000.05720.32
5.5.310.0200.03720.29
5.5.300.0070.04018.07
5.5.290.0070.05317.97
5.5.280.0130.05720.80
5.5.270.0100.08020.86
5.5.260.0030.06020.90
5.5.250.0030.07020.72
5.5.240.0170.06720.39
5.4.450.0200.06019.30
5.4.440.0230.06019.31
5.4.430.0170.06019.54
5.4.420.0200.05019.31
5.4.410.0200.07319.33
5.4.400.0200.05019.16
5.4.390.0230.07318.99
5.4.380.0230.04319.08
5.4.370.0370.03319.13
5.4.360.0270.06719.09
5.4.350.0370.05018.96
5.4.340.0230.05018.96
5.4.320.0270.06019.09
5.4.310.0270.04018.94
5.4.300.0330.06319.24
5.4.290.0270.07319.13
5.4.280.0230.06319.06
5.4.270.0230.05319.08
5.4.260.0100.04719.16
5.4.250.0230.06719.15
5.4.240.0230.05019.15
5.4.230.0170.03718.98
5.4.220.0300.04718.94
5.4.210.0170.05019.30
5.4.200.0230.07019.08
5.4.190.0230.06719.21
5.4.180.0300.03719.07
5.4.170.0230.04719.12
5.4.160.0230.07318.80
5.4.150.0200.07319.22
5.4.140.0300.03716.38
5.4.130.0230.04316.40
5.4.120.0230.06316.38
5.4.110.0230.06016.45
5.4.100.0200.03716.46
5.4.90.0130.05016.64
5.4.80.0270.05716.32
5.4.70.0170.06016.60
5.4.60.0200.06716.43
5.4.50.0300.05316.62
5.4.40.0200.07316.57
5.4.30.0200.05016.47
5.4.20.0300.06716.47
5.4.10.0270.06716.28
5.4.00.0030.07316.16
5.3.290.0300.04714.86
5.3.280.0200.03314.71
5.3.270.0230.07014.71
5.3.260.0230.03714.59
5.3.250.0170.05314.91
5.3.240.0230.07014.66
5.3.230.0130.08014.75
5.3.220.0230.03714.86
5.3.210.0230.07314.72
5.3.200.0200.07014.86
5.3.190.0200.08014.65
5.3.180.0070.05014.63
5.3.170.0270.07014.55
5.3.160.0200.07014.56
5.3.150.0200.04714.79
5.3.140.0200.05014.63
5.3.130.0200.07714.70
5.3.120.0300.06314.84
5.3.110.0270.07014.63
5.3.100.0100.06314.19
5.3.90.0200.07314.19
5.3.80.0270.07014.19
5.3.70.0300.06714.19
5.3.60.0230.04314.19
5.3.50.0230.06314.19
5.3.40.0270.06714.19
5.3.30.0200.04014.19
5.3.20.0230.07014.19
5.3.10.0100.06314.19
5.3.00.0200.07714.19
5.2.170.0230.05714.19
5.2.160.0200.04314.19
5.2.150.0200.05714.19
5.2.140.0230.04714.19
5.2.130.0170.06014.19
5.2.120.0170.05714.19
5.2.110.0200.05314.19
5.2.100.0170.05014.19
5.2.90.0130.05314.19
5.2.80.0200.05714.19
5.2.70.0130.04314.19
5.2.60.0130.04014.19
5.2.50.0230.06014.19
5.2.40.0100.03314.19
5.2.30.0170.06014.19
5.2.20.0100.04714.19
5.2.10.0270.05014.19
5.2.00.0130.06014.19
5.1.60.0130.04014.19
5.1.50.0130.03714.19
5.1.40.0170.03014.19
5.1.30.0130.02714.19
5.1.20.0170.05314.19
5.1.10.0230.04714.19
5.1.00.0130.04314.19
5.0.50.0230.02714.19
5.0.40.0100.04314.19
5.0.30.0070.04714.19
5.0.20.0100.04014.19
5.0.10.0100.02714.19
5.0.00.0070.03714.19
4.4.90.0070.02014.19
4.4.80.0070.03714.19
4.4.70.0100.01714.19
4.4.60.0100.01314.19
4.4.50.0100.03314.19
4.4.40.0030.03714.19
4.4.30.0070.02314.19
4.4.20.0130.03014.19
4.4.10.0070.02014.19
4.4.00.0070.04714.19
4.3.110.0070.03714.19
4.3.100.0070.03014.19
4.3.90.0100.02014.19
4.3.80.0100.02314.19
4.3.70.0070.02014.19
4.3.60.0070.02314.19
4.3.50.0100.03314.19
4.3.40.0070.03314.19
4.3.30.0030.02014.19
4.3.20.0030.03314.19
4.3.10.0070.02314.19
4.3.00.0030.02314.19

preferences:
37.31 ms | 401 KiB | 5 Q