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) { $acopy = $a; foreach ($b as $key => $value) { $acopy[$key] = $value; } return $acopy; } } $startTimeFunc = microtime(true); merging::amerge($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)
7.4.00.0090.00815.05
7.3.120.0070.01115.06
7.3.110.0020.01714.95
7.3.100.0020.01214.77
7.3.90.0070.01014.88
7.3.80.0020.01114.66
7.3.70.0080.00614.93
7.3.60.0050.00614.98
7.3.50.0050.01114.70
7.3.40.0060.00614.78
7.3.30.0060.00814.99
7.3.20.0070.00716.67
7.3.10.0080.00816.77
7.3.00.0040.00916.71
7.2.250.0100.00815.12
7.2.240.0020.01615.15
7.2.230.0060.00915.06
7.2.220.0030.01315.26
7.2.210.0050.01215.10
7.2.200.0080.00615.23
7.2.190.0060.01015.19
7.2.180.0040.01315.04
7.2.170.0050.01115.11
7.2.00.0100.00319.53
7.1.330.0070.01015.94
7.1.320.0080.00615.81
7.1.310.0050.00715.79
7.1.300.0020.01015.93
7.1.290.0020.01315.79
7.1.280.0030.01015.64
7.1.270.0090.00315.75
7.1.260.0090.00616.01
7.1.70.0040.00417.22
7.1.60.0060.01919.70
7.1.50.0120.01217.03
7.1.00.0070.07322.32
7.0.200.0000.00916.94
7.0.140.0000.07722.05
7.0.100.0130.07720.00
7.0.90.0170.04319.96
7.0.80.0370.07720.00
7.0.70.0300.07319.96
7.0.60.0400.07319.96
7.0.50.0100.08020.38
7.0.40.0030.09020.00
7.0.30.0100.08020.15
7.0.20.0130.07720.19
7.0.10.0030.08320.13
7.0.00.0230.06020.04
5.6.280.0000.07720.89
5.6.250.0130.07020.76
5.6.240.0130.07720.64
5.6.230.0030.07720.72
5.6.220.0130.08020.68
5.6.210.0230.07320.65
5.6.200.0100.08721.12
5.6.190.0030.08321.10
5.6.180.0270.06021.07
5.6.170.0170.07321.16
5.6.160.0200.06721.05
5.6.150.0130.07021.05
5.6.140.0070.08320.99
5.6.130.0030.08721.12
5.6.120.0100.07721.11
5.6.110.0070.08320.97
5.6.100.0030.08321.14
5.6.90.0270.06721.15
5.6.80.0170.06720.48
5.6.70.0070.08020.55
5.6.60.0170.07320.44
5.6.50.0070.08020.44
5.6.40.0030.08020.45
5.6.30.0030.08720.43
5.6.20.0130.07020.47
5.6.10.0030.06720.45
5.6.00.0200.06320.49
5.5.380.0070.08020.53
5.5.370.0200.07320.41
5.5.360.0170.07020.45
5.5.350.0030.09720.44
5.5.340.0130.07720.80
5.5.330.0070.08320.93
5.5.320.0130.07320.93
5.5.310.0070.08320.93
5.5.300.0070.08020.93
5.5.290.0070.07320.89
5.5.280.0100.09020.67
5.5.270.0070.08020.76
5.5.260.0170.07320.90
5.5.250.0070.08320.77
5.5.240.0070.07320.34
5.5.230.0070.07720.31
5.5.220.0070.08320.29
5.5.210.0100.07720.21
5.5.200.0200.05020.22
5.5.190.0070.07020.30
5.5.180.0130.07020.15
5.5.160.0030.08020.00
5.5.150.0100.05020.23
5.5.140.0030.07720.27
5.5.130.0130.07020.29
5.5.120.0130.06720.19
5.5.110.0070.08320.02
5.5.100.0130.06720.14
5.5.90.0130.03020.16
5.5.80.0030.05020.15
5.5.70.0100.04720.10
5.5.60.0100.03320.07
5.5.50.0070.05320.14
5.5.40.0070.03720.10
5.5.30.0030.03719.93
5.5.20.0170.06720.14
5.5.10.0030.04320.00
5.5.00.0070.05320.11
5.4.450.0070.07719.23
5.4.440.0070.08319.45
5.4.430.0070.06719.54
5.4.420.0030.04719.50
5.4.410.0100.07719.07
5.4.400.0100.08018.86
5.4.390.0170.07019.00
5.4.380.0030.07018.85
5.4.370.0070.07019.13
5.4.360.0130.06719.18
5.4.350.0170.07019.05
5.4.340.0130.06719.04
5.4.320.0130.07318.95
5.4.310.0030.07319.04
5.4.300.0070.07319.14
5.4.290.0100.07019.19
5.4.280.0000.08019.18
5.4.270.0070.08019.13
5.4.260.0100.06319.09
5.4.250.0000.04019.22
5.4.240.0100.03719.09
5.4.230.0070.03319.11
5.4.220.0030.03719.18
5.4.210.0100.04019.18
5.4.200.0030.03719.13
5.4.190.0130.06319.15
5.4.180.0030.07719.02
5.4.170.0000.05319.13
5.4.160.0000.04019.17
5.4.150.0030.03719.12
5.4.140.0030.03316.50
5.4.130.0030.03716.31
5.4.120.0030.03716.39
5.4.110.0030.05016.57
5.4.100.0000.04016.48
5.4.90.0100.03316.57
5.4.80.0070.03016.55
5.4.70.0000.04016.52
5.4.60.0030.04016.46
5.4.50.0000.03716.53
5.4.40.0100.05016.36
5.4.30.0070.03316.51
5.4.20.0030.05016.39
5.4.10.0100.04716.40
5.4.00.0030.07315.83
5.3.290.0100.06714.85
5.3.280.0000.04014.68
5.3.270.0030.06714.70
5.3.260.0070.03314.80
5.3.250.0100.05714.64
5.3.240.0070.03714.67
5.3.230.0000.04014.82
5.3.220.0030.03714.66
5.3.210.0030.04014.57
5.3.200.0070.03314.63
5.3.190.0030.03714.68
5.3.180.0100.03014.71
5.3.170.0000.04014.72
5.3.160.0030.03714.70
5.3.150.0030.04014.74
5.3.140.0030.04014.70
5.3.130.0000.04014.65
5.3.120.0130.04714.61
5.3.110.0070.07014.69
5.3.100.0030.08014.13
5.3.90.0100.07314.12
5.3.80.0000.04314.12
5.3.70.0070.07314.09
5.3.60.0030.08014.18
5.3.50.0030.08014.04
5.3.40.0070.07314.14
5.3.30.0100.07014.08
5.3.20.0100.07313.83
5.3.10.0070.04713.83
5.3.00.0170.05313.84
5.2.170.0000.07011.32
5.2.160.0070.05311.23
5.2.150.0030.05011.28
5.2.140.0030.03711.14
5.2.130.0000.05711.27
5.2.120.0070.04311.29
5.2.110.0030.04711.30
5.2.100.0130.05311.21
5.2.90.0030.05711.19
5.2.80.0100.03711.19
5.2.70.0070.05711.07
5.2.60.0070.03711.16
5.2.50.0070.06011.03
5.2.40.0070.04310.99
5.2.30.0070.06011.05
5.2.20.0100.05311.05
5.2.10.0000.05711.06
5.2.00.0130.05010.93
5.1.60.0030.04310.15
5.1.50.0070.04010.09
5.1.40.0000.05710.13
5.1.30.0030.04710.36
5.1.20.0070.02310.51
5.1.10.0000.04710.25
5.1.00.0000.05710.08
5.0.50.0070.0438.64
5.0.40.0030.0278.52
5.0.30.0070.0578.07
5.0.20.0070.0408.30
5.0.10.0000.0438.02
5.0.00.0070.0638.23
4.4.90.0070.0307.95
4.4.80.0070.0277.95
4.4.70.0030.0237.95
4.4.60.0070.0237.95
4.4.50.0000.0307.95
4.4.40.0030.0577.95
4.4.30.0000.0337.95
4.4.20.0000.0377.95
4.4.10.0000.0337.95
4.4.00.0030.0477.95
4.3.110.0000.0337.95
4.3.100.0000.0307.95
4.3.90.0000.0377.95
4.3.80.0100.0437.95
4.3.70.0000.0377.95
4.3.60.0030.0307.95
4.3.50.0030.0337.95
4.3.40.0000.0337.95
4.3.30.0000.0177.95
4.3.20.0030.0337.95
4.3.10.0000.0207.95
4.3.00.0000.0307.95

preferences:
37.44 ms | 401 KiB | 5 Q