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)
7.4.10.0060.01416.63
7.4.00.0130.00716.83
7.3.130.0070.01116.69
7.3.120.0070.01016.80
7.3.110.0100.00316.86
7.3.100.0090.00316.85
7.3.90.0060.00616.79
7.3.80.0100.00716.96
7.3.70.0070.01016.77
7.3.60.0030.01016.78
7.3.50.0070.01016.67
7.3.40.0060.00616.70
7.3.30.0100.00716.78
7.3.20.0100.00718.27
7.3.10.0040.01118.11
7.3.00.0060.01218.27
7.2.260.0100.01017.03
7.2.250.0090.00916.98
7.2.240.0000.01716.84
7.2.230.0040.00716.85
7.2.220.0100.00717.13
7.2.210.0070.00716.91
7.2.200.0030.01017.01
7.2.190.0060.01016.70
7.2.180.0100.00316.84
7.2.170.0060.00916.88
7.2.160.0030.01416.83
7.2.150.0000.01418.41
7.2.140.0030.01018.43
7.2.130.0130.00318.43
7.2.120.0070.00718.49
7.2.110.0060.01018.48
7.2.100.0040.00818.59
7.2.90.0060.01118.49
7.2.80.0090.00618.31
7.2.70.0030.01318.50
7.2.60.0090.00918.50
7.2.50.0090.00918.25
7.2.40.0100.00318.48
7.2.30.0030.01018.54
7.2.20.0080.00418.54
7.2.10.0120.00318.42
7.2.00.0060.01018.93
7.1.330.0090.00617.29
7.1.320.0100.00617.35
7.1.310.0030.01617.39
7.1.300.0070.01017.32
7.1.290.0180.00017.49
7.1.280.0030.00717.29
7.1.270.0030.01317.51
7.1.260.0040.01117.22
7.1.250.0060.00917.20
7.1.240.0000.01217.38
7.1.230.0040.00817.39
7.1.220.0090.00617.32
7.1.210.0000.01717.39
7.1.200.0030.01617.32
7.1.190.0070.00717.41
7.1.180.0060.00617.40
7.1.170.0090.00617.37
7.1.160.0070.00717.50
7.1.150.0070.01017.45
7.1.140.0070.00717.58
7.1.130.0030.01217.38
7.1.120.0040.00817.37
7.1.110.0000.01517.50
7.1.100.0000.01817.31
7.1.90.0000.01417.36
7.1.80.0000.01217.29
7.1.70.0050.00717.17
7.1.60.0080.01318.45
7.1.50.0070.00717.26
7.1.40.0130.00317.57
7.1.30.0030.01217.33
7.1.20.0130.00317.52
7.1.10.0030.01017.46
7.1.00.0040.04219.88
7.0.330.0040.01117.00
7.0.320.0140.00317.16
7.0.310.0060.00616.89
7.0.300.0100.00617.13
7.0.290.0030.01316.95
7.0.280.0100.00717.05
7.0.270.0100.00617.04
7.0.260.0090.00617.07
7.0.250.0100.00717.09
7.0.240.0090.00017.14
7.0.230.0120.00317.07
7.0.220.0040.00817.10
7.0.210.0030.01316.98
7.0.200.0060.00716.86
7.0.190.0140.00317.16
7.0.180.0070.00717.20
7.0.170.0080.00417.20
7.0.160.0070.00716.89
7.0.150.0090.00617.11
7.0.140.0070.03819.52
7.0.130.0090.00617.10
7.0.120.0070.01017.15
7.0.110.0050.04618.57
7.0.100.0060.02118.61
7.0.90.0070.04918.65
7.0.80.0100.04018.63
7.0.70.0070.04518.66
7.0.60.0100.04518.61
7.0.50.0170.03518.65
7.0.40.0030.03417.44
7.0.30.0070.04517.33
7.0.20.0070.03917.38
7.0.10.0100.02517.34
7.0.00.0110.02317.41
5.6.400.0120.00316.96
5.6.390.0070.01016.80
5.6.380.0070.00716.55
5.6.370.0000.01616.68
5.6.360.0070.01316.69
5.6.350.0000.01116.63
5.6.340.0100.00616.62
5.6.330.0030.00916.35
5.6.320.0040.01116.29
5.6.310.0070.01116.64
5.6.300.0060.01316.66
5.6.290.0030.01016.73
5.6.280.0080.04219.04
5.6.270.0070.01416.74
5.6.260.0050.02518.69
5.6.250.0040.02818.86
5.6.240.0100.04818.86
5.6.230.0080.04718.74
5.6.220.0070.04518.81
5.6.210.0100.04718.98
5.6.200.0110.04418.89
5.6.190.0080.04018.85
5.6.180.0050.04718.82
5.6.170.0080.04518.88
5.6.160.0070.04518.90
5.6.150.0130.03618.93
5.6.140.0070.02518.93
5.6.130.0070.02818.91
5.6.120.0070.02718.90
5.6.110.0070.02218.83
5.6.100.0000.03418.84
5.6.90.0080.02018.85
5.6.80.0030.02918.52
5.6.70.0040.02818.57
5.6.60.0070.02818.46
5.6.50.0050.01918.53
5.6.40.0030.02218.54
5.6.30.0050.03218.60
5.6.20.0050.02718.51
5.6.10.0050.04018.57
5.6.00.0050.02618.40
5.5.380.0100.04317.33
5.5.370.0080.04417.37
5.5.360.0090.04517.32
5.5.350.0080.03717.35
5.5.340.0100.02917.53
5.5.330.0070.04617.52
5.5.320.0070.04717.62
5.5.310.0100.03017.52
5.5.300.0110.03917.52
5.5.290.0100.02717.66
5.5.280.0070.02517.49
5.5.270.0020.03217.58
5.5.260.0000.02917.57
5.5.250.0100.02217.40
5.5.240.0070.03717.09
5.5.230.0050.02617.13
5.5.220.0020.03117.17
5.5.210.0070.02317.21
5.5.200.0110.02017.17
5.5.190.0050.02617.18
5.5.180.0120.04217.23
5.5.170.0030.01416.29
5.5.160.0070.04417.07
5.5.150.0090.03617.15
5.5.140.0080.02217.22
5.5.130.0140.02917.29
5.5.120.0050.02917.15
5.5.110.0050.02617.07
5.5.100.0050.02417.24
5.5.90.0090.02217.14
5.5.80.0130.03717.08
5.5.70.0050.02517.25
5.5.60.0120.02216.98
5.5.50.0070.02517.04
5.5.40.0100.03717.03
5.5.30.0060.02817.18
5.5.20.0050.02617.14
5.5.10.0030.03017.03
5.5.00.0070.02817.11
5.4.450.0080.02616.91
5.4.440.0060.02517.06
5.4.430.0030.03716.86
5.4.420.0030.02416.88
5.4.410.0030.03016.92
5.4.400.0030.02516.90
5.4.390.0070.03816.81
5.4.380.0080.02016.75
5.4.370.0030.02616.74
5.4.360.0020.02816.72
5.4.350.0080.02016.70
5.4.340.0050.02316.70
5.4.330.0000.01713.98
5.4.320.0030.02516.76
5.4.310.0080.02016.89
5.4.300.0050.02216.71
5.4.290.0020.02516.71
5.4.280.0020.02616.82
5.4.270.0050.04316.85
5.4.260.0020.03216.77
5.4.250.0020.02716.90
5.4.240.0030.02716.74
5.4.230.0040.03416.71
5.4.220.0090.01916.76
5.4.210.0030.04216.70
5.4.200.0050.02116.71
5.4.190.0070.02016.80
5.4.180.0070.04416.69
5.4.170.0070.02116.69
5.4.160.0090.02116.71
5.4.150.0040.02416.76
5.4.140.0070.02515.49
5.4.130.0070.02015.46
5.4.120.0030.03715.46
5.4.110.0080.03815.49
5.4.100.0090.04115.49
5.4.90.0030.04115.43
5.4.80.0070.03715.48
5.4.70.0050.03415.46
5.4.60.0040.04415.37
5.4.50.0070.04215.38
5.4.40.0100.02815.47
5.4.30.0090.03715.43
5.4.20.0030.04015.36
5.4.10.0060.03815.42
5.4.00.0020.04415.12
5.3.290.0020.02314.71
5.3.280.0050.03014.68
5.3.270.0100.03714.63
5.3.260.0070.02214.63
5.3.250.0020.02514.69
5.3.240.0020.02414.65
5.3.230.0090.04114.71
5.3.220.0070.03214.64
5.3.210.0070.04214.74
5.3.200.0100.03514.67
5.3.190.0080.04114.64
5.3.180.0100.04014.63
5.3.170.0100.03514.70
5.3.160.0050.04214.71
5.3.150.0030.04514.68
5.3.140.0030.04514.65
5.3.130.0030.04414.69
5.3.120.0040.04814.63
5.3.110.0080.04014.62
5.3.100.0090.04014.43
5.3.90.0050.03614.34
5.3.80.0080.03914.35
5.3.70.0030.05114.37
5.3.60.0050.04014.37
5.3.50.0100.03914.33
5.3.40.0020.04514.33
5.3.30.0070.04714.31
5.3.20.0000.04914.17
5.3.10.0080.03514.16
5.3.00.0100.03714.18
5.2.170.0000.06712.10
5.2.160.0030.06312.10
5.2.150.0030.06712.10
5.2.140.0100.06012.10
5.2.130.0030.07012.10
5.2.120.0070.06012.10
5.2.110.0030.07012.10
5.2.100.0030.06712.10
5.2.90.0130.06012.10
5.2.80.0000.06712.10
5.2.70.0030.04312.10
5.2.60.0100.06012.10
5.2.50.0030.06012.10
5.2.40.0030.06712.10
5.2.30.0000.06312.10
5.2.20.0070.06712.10
5.2.10.0070.06012.10
5.2.00.0070.06012.10
5.1.60.0070.05312.10
5.1.50.0030.05712.10
5.1.40.0070.05012.10
5.1.30.0030.06012.10
5.1.20.0070.05312.10
5.1.10.0000.06712.10
5.1.00.0000.05312.10
5.0.50.0000.03312.10
5.0.40.0100.03712.10
5.0.30.0000.05712.10
5.0.20.0070.04012.10
5.0.10.0030.04312.10
5.0.00.0070.05312.10
4.4.90.0030.03012.10
4.4.80.0070.03312.10
4.4.70.0030.03312.10
4.4.60.0000.03012.10
4.4.50.0070.03012.10
4.4.40.0030.05012.10
4.4.30.0030.03312.10
4.4.20.0100.03012.10
4.4.10.0030.03712.10
4.4.00.0070.05312.10
4.3.110.0070.03012.10
4.3.100.0070.03312.10
4.3.90.0000.03712.10
4.3.80.0000.05312.10
4.3.70.0030.03312.10
4.3.60.0000.03312.10
4.3.50.0000.03312.10
4.3.40.0000.05312.10
4.3.30.0030.03312.10
4.3.20.0030.02312.10
4.3.10.0000.03712.10
4.3.00.0030.03012.10

preferences:
29.25 ms | 400 KiB | 5 Q