3v4l.org

run code in 300+ PHP versions simultaneously
<?php $classmap1 = array(); for ($i=1; $i<=10000; $i++) { $classmap1['a'.$i] = $i+1; } $classmap2 = array(); for ($i=1; $i<=10000; $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; } $startTimeFunc = microtime(true); amerge($classmap1, $classmap2, true); $endTimeFunc = microtime(true); echo "Merging took " . (($endTimeMerge - $startTimeMerge)*1000) ." microseconds<br />\n"; echo "Foreach took " . (($endTimeForeach - $startTimeForeach)*1000) ." microseconds<br />\n"; echo "Func took " . (($endTimeFunc - $startTimeFunc)*1000) ." microseconds<br />\n";

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)
7.3.10.0130.00924.78
7.3.00.0200.01624.74
7.2.130.0070.01022.74
7.2.120.0110.01122.84
7.2.110.0130.01022.89
7.2.100.0120.02222.83
7.2.90.0190.01622.39
7.2.80.0000.02122.53
7.2.70.0250.01722.84
7.2.60.0180.01422.80
7.2.50.0260.01222.86
7.2.40.0200.02022.70
7.2.30.0240.01422.73
7.2.20.0110.02222.89
7.2.10.0210.01922.83
7.2.00.0140.01724.09
7.1.250.0160.01621.62
7.1.70.0030.01023.13
7.1.60.0100.02322.95
7.1.50.0070.01022.79
7.1.00.0000.04728.22
7.0.200.0030.01322.77
7.0.140.0070.07727.95
7.0.70.0200.06724.25
7.0.60.0200.04324.07
7.0.50.0200.06724.54
7.0.40.0030.09720.10
7.0.30.0070.08720.14
7.0.20.0100.09319.95
7.0.10.0070.08720.18
7.0.00.0070.06320.14
5.6.280.0100.08730.41
5.6.220.0170.09729.90
5.6.210.0070.10329.93
5.6.200.0170.07030.21
5.6.190.0130.10330.42
5.6.180.0130.07030.40
5.6.170.0100.09730.46
5.6.160.0200.09030.35
5.6.150.0100.07030.33
5.6.140.0000.07030.23
5.6.130.0070.06030.29
5.6.120.0100.10030.31
5.6.110.0030.09030.28
5.6.100.0100.06730.29
5.6.90.0070.08730.36
5.6.80.0170.08029.75
5.6.70.0100.07029.71
5.6.60.0070.09329.75
5.6.50.0230.08329.75
5.6.40.0100.05329.75
5.6.30.0100.07029.65
5.6.20.0170.08329.75
5.6.10.0230.08029.64
5.6.00.0070.10329.66
5.5.360.0130.07729.68
5.5.350.0130.09729.73
5.5.340.0100.09330.15
5.5.330.0200.08730.14
5.5.320.0100.05330.09
5.5.310.0100.10030.08
5.5.300.0170.06030.00
5.5.290.0100.09329.93
5.5.280.0130.10030.21
5.5.270.0130.10030.06
5.5.260.0100.09730.21
5.5.250.0030.06329.98
5.5.240.0200.09029.61
5.5.230.0000.09029.58
5.5.220.0100.07729.27
5.5.210.0100.05729.57
5.5.200.0100.06729.53
5.5.190.0030.12029.29
5.5.180.0100.10729.41
5.5.160.0170.08729.40
5.5.150.0130.09329.37
5.5.140.0070.06729.52
5.5.130.0030.07729.52
5.5.120.0200.07729.57
5.5.110.0100.10029.41
5.5.100.0100.08329.37
5.5.90.0130.08329.29
5.5.80.0170.09729.39
5.5.70.0100.07729.29
5.5.60.0000.05329.45
5.5.50.0100.08729.26
5.5.40.0170.08029.26
5.5.30.0130.09329.15
5.5.20.0100.07029.25
5.5.10.0100.10329.16
5.5.00.0230.08329.22
5.4.450.0170.08728.43
5.4.440.0100.10028.55
5.4.430.0070.07028.35
5.4.420.0130.09328.29
5.4.410.0030.09328.41
5.4.400.0170.08028.07
5.4.390.0100.09027.93
5.4.380.0200.09328.32
5.4.370.0100.06327.99
5.4.360.0200.09728.07
5.4.350.0170.09328.30
5.4.340.0030.09027.98
5.4.320.0200.08728.09
5.4.310.0100.07328.09
5.4.300.0070.06727.92
5.4.290.0170.04728.15
5.4.280.0100.08328.07
5.4.270.0230.08728.15
5.4.260.0170.09327.92
5.4.250.0130.09327.90
5.4.240.0170.10728.10
5.4.230.0130.09727.87
5.4.220.0300.07328.09
5.4.210.0130.06728.01
5.4.200.0070.07727.98
5.4.190.0270.09328.14
5.4.180.0230.07028.04
5.4.170.0030.11027.89
5.4.160.0130.09027.91
5.4.150.0130.09327.86
5.4.140.0070.08025.38
5.4.130.0100.07025.43
5.4.120.0130.07325.40
5.4.110.0100.08325.41
5.4.100.0100.07025.54
5.4.90.0170.08325.56
5.4.80.0200.08725.52
5.4.70.0170.09025.57
5.4.60.0100.08725.40
5.4.50.0030.09725.33
5.4.40.0130.09725.34
5.4.30.0230.06025.36
5.4.20.0200.08725.34
5.4.10.0070.06025.38
5.4.00.0070.09724.88
5.3.290.0100.07723.83
5.3.280.0000.06023.77
5.3.270.0100.09323.80
5.3.260.0130.09323.66
5.3.250.0200.08723.77
5.3.240.0100.10023.72
5.3.230.0230.09723.64
5.3.220.0170.09323.78
5.3.210.0000.09323.63
5.3.200.0070.09723.71
5.3.190.0070.09723.75
5.3.180.0100.10323.70
5.3.170.0070.09024.02
5.3.160.0100.09023.59
5.3.150.0200.09023.69
5.3.140.0070.09323.61
5.3.130.0030.10323.70
5.3.120.0000.09023.68
5.3.110.0170.09323.63
5.3.100.0130.09723.23
5.3.90.0000.09723.25
5.3.80.0130.09323.00
5.3.70.0200.08723.05
5.3.60.0200.09023.17
5.3.50.0070.09722.98
5.3.40.0130.09023.13
5.3.30.0070.09322.96
5.3.20.0100.09322.84
5.3.10.0130.09022.83
5.3.00.0100.05722.43
5.2.170.0070.05020.14
5.2.160.0130.07720.19
5.2.150.0130.09020.05
5.2.140.0030.09020.14
5.2.130.0270.07020.12
5.2.120.0030.09020.07
5.2.110.0170.08020.14
5.2.100.0130.06720.01
5.2.90.0070.07720.35
5.2.80.0130.07720.18
5.2.70.0070.04719.98
5.2.60.0030.06720.06
5.2.50.0070.07319.67
5.2.40.0070.05319.62
5.2.30.0070.05718.71
5.2.20.0130.03718.57
5.2.10.0000.06018.63
5.2.00.0130.04019.50
5.1.60.0000.04320.50
5.1.50.0100.04020.39
5.1.40.0070.04320.32
5.1.30.0070.04320.82
5.1.20.0030.04720.97
5.1.10.0030.04320.69
5.1.00.0130.03320.49
5.0.50.0000.02310.65
5.0.40.0070.01310.65
5.0.30.0070.02710.65
5.0.20.0030.04010.65
5.0.10.0070.02310.65
5.0.00.0000.03310.65
4.4.90.0000.03710.65
4.4.80.0030.03010.65
4.4.70.0030.01310.65
4.4.60.0030.01710.65
4.4.50.0000.01710.65
4.4.40.0030.02010.65
4.4.30.0000.01710.65
4.4.20.0000.01310.65
4.4.10.0030.01310.65
4.4.00.0030.02010.65
4.3.110.0000.01310.65
4.3.100.0030.01010.65
4.3.90.0000.02310.65
4.3.80.0030.02310.65
4.3.70.0070.00710.65
4.3.60.0070.02010.65
4.3.50.0000.03710.65
4.3.40.0070.04010.65
4.3.30.0000.02310.65
4.3.20.0030.02010.65
4.3.10.0030.01710.65
4.3.00.0000.02310.65

preferences:
38.74 ms | 401 KiB | 5 Q