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; } $endTimeForeach = microtime(true); function amerge(array &$a, array &$b) { foreach ($b as $key => $value) { $a[$key] = $value; } return $a; } $startTimeFunc = microtime(true); amerge($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)
7.4.10.0070.01116.51
7.4.00.0030.01016.73
7.3.130.0100.01016.68
7.3.120.0100.01016.33
7.3.110.0030.01216.39
7.3.100.0100.00716.64
7.3.90.0090.00316.32
7.3.80.0070.01116.38
7.3.70.0060.00916.46
7.3.60.0060.00916.52
7.3.50.0040.00816.35
7.3.40.0060.00616.32
7.3.30.0030.01016.38
7.3.20.0100.00318.32
7.3.10.0070.00718.32
7.3.00.0040.00718.26
7.2.260.0090.00916.50
7.2.250.0090.00916.70
7.2.240.0100.00716.50
7.2.230.0080.00616.58
7.2.220.0060.00916.70
7.2.210.0070.00716.76
7.2.200.0040.01116.53
7.2.190.0100.00716.63
7.2.180.0030.01316.55
7.2.170.0030.01316.50
7.2.160.0080.01116.55
7.2.150.0030.01018.46
7.2.140.0090.00318.34
7.2.130.0030.01318.51
7.2.120.0040.00718.38
7.2.110.0080.00618.40
7.2.100.0070.01018.31
7.2.90.0120.00318.33
7.2.80.0030.00718.26
7.2.70.0130.00318.39
7.2.60.0040.01118.23
7.2.50.0080.00418.43
7.2.40.0100.00318.36
7.2.30.0070.01018.54
7.2.20.0030.01018.36
7.2.10.0070.01018.38
7.2.00.0050.00718.78
7.1.330.0060.00917.31
7.1.320.0100.00317.25
7.1.310.0070.01017.25
7.1.300.0060.01017.29
7.1.290.0000.01017.55
7.1.280.0070.01017.46
7.1.270.0000.01417.60
7.1.260.0120.00017.27
7.1.250.0070.00717.24
7.1.240.0000.01117.45
7.1.230.0090.00617.54
7.1.220.0070.01117.35
7.1.210.0090.00317.26
7.1.200.0030.00617.43
7.1.190.0070.00717.40
7.1.180.0040.01217.26
7.1.170.0120.00317.25
7.1.160.0100.00317.30
7.1.150.0030.01317.27
7.1.140.0040.00817.21
7.1.130.0040.01117.43
7.1.120.0110.00017.25
7.1.110.0030.01217.48
7.1.100.0100.00617.16
7.1.90.0000.01317.59
7.1.80.0030.01317.35
7.1.70.0050.00517.23
7.1.60.0100.01218.41
7.1.50.0090.00317.14
7.1.40.0060.00617.46
7.1.30.0070.00317.44
7.1.20.0090.00617.46
7.1.10.0070.00717.32
7.1.00.0060.02219.85
7.0.330.0070.01016.96
7.0.320.0080.00816.92
7.0.310.0100.00317.25
7.0.300.0060.00917.12
7.0.290.0060.00917.20
7.0.280.0040.00717.02
7.0.270.0040.01117.02
7.0.260.0090.00317.01
7.0.250.0030.00917.11
7.0.240.0070.00717.05
7.0.230.0060.00916.99
7.0.220.0090.00917.04
7.0.210.0000.01517.23
7.0.200.0070.00516.98
7.0.190.0090.00616.92
7.0.180.0090.00617.01
7.0.170.0110.00416.90
7.0.160.0070.00716.93
7.0.150.0060.00917.03
7.0.140.0080.03719.49
7.0.130.0030.01217.16
7.0.120.0030.01317.02
7.0.110.0060.00917.10
7.0.100.0100.00317.16
7.0.90.0070.00716.96
7.0.80.0080.00317.21
7.0.70.0100.03819.44
7.0.60.0040.04719.45
7.0.50.0080.04519.59
7.0.40.0060.04617.49
7.0.30.0040.03917.56
7.0.20.0030.05017.43
7.0.10.0070.04517.45
7.0.00.0070.04717.57
5.6.400.0070.00715.73
5.6.390.0070.00715.70
5.6.380.0030.01216.36
5.6.370.0030.00616.15
5.6.360.0070.00716.28
5.6.350.0070.00716.20
5.6.340.0040.00816.09
5.6.330.0120.00316.24
5.6.320.0080.00816.09
5.6.310.0070.01016.10
5.6.300.0030.00715.91
5.6.290.0040.00916.21
5.6.280.0070.04818.46
5.6.270.0100.00716.20
5.6.260.0080.00415.93
5.6.250.0070.00716.16
5.6.240.0040.01515.93
5.6.230.0080.00316.02
5.6.220.0070.03618.45
5.6.210.0090.04018.37
5.6.200.0080.04118.74
5.6.190.0030.04318.55
5.6.180.0090.04418.62
5.6.170.0030.03318.54
5.6.160.0040.02718.46
5.6.150.0050.02518.51
5.6.140.0070.04518.67
5.6.130.0000.04718.44
5.6.120.0130.03718.43
5.6.110.0060.04118.61
5.6.100.0050.03818.44
5.6.90.0050.04818.41
5.6.80.0030.04818.03
5.6.70.0120.02018.28
5.6.60.0050.02718.30
5.6.50.0050.04318.27
5.6.40.0080.04318.22
5.6.30.0100.03518.18
5.6.20.0100.03818.12
5.6.10.0030.05017.99
5.6.00.0070.03318.19
5.5.380.0060.01016.19
5.5.370.0030.01216.09
5.5.360.0060.03518.25
5.5.350.0070.04718.24
5.5.340.0020.04518.47
5.5.330.0090.03718.50
5.5.320.0050.04018.54
5.5.310.0050.04518.44
5.5.300.0070.04718.51
5.5.290.0050.04718.40
5.5.280.0130.04018.57
5.5.270.0070.04318.42
5.5.260.0020.04718.49
5.5.250.0090.04418.34
5.5.240.0030.04618.08
5.5.230.0060.04418.03
5.5.220.0050.04217.99
5.5.210.0050.04318.08
5.5.200.0080.04218.09
5.5.190.0020.04518.06
5.5.180.0040.04218.08
5.5.170.0030.00815.71
5.5.160.0120.03818.01
5.5.150.0060.03518.11
5.5.140.0070.04418.03
5.5.130.0050.03518.02
5.5.120.0070.03918.02
5.5.110.0080.04218.11
5.5.100.0030.04917.98
5.5.90.0050.03318.08
5.5.80.0020.04518.02
5.5.70.0080.02117.95
5.5.60.0020.02317.81
5.5.50.0050.02817.92
5.5.40.0060.02217.98
5.5.30.0000.02717.94
5.5.20.0030.02117.98
5.5.10.0080.02518.05
5.5.00.0050.04218.01
5.4.450.0070.04316.09
5.4.440.0060.04116.15
5.4.430.0030.04415.89
5.4.420.0030.02716.24
5.4.410.0070.04016.08
5.4.400.0070.04015.93
5.4.390.0070.04016.01
5.4.380.0020.04116.05
5.4.370.0030.04415.91
5.4.360.0030.04215.84
5.4.350.0020.04315.97
5.4.340.0110.03915.88
5.4.330.0030.00512.83
5.4.320.0080.02515.92
5.4.310.0020.03715.86
5.4.300.0040.03715.84
5.4.290.0040.04216.02
5.4.280.0030.04415.88
5.4.270.0050.04315.75
5.4.260.0020.04216.04
5.4.250.0060.04315.93
5.4.240.0050.02015.83
5.4.230.0050.02715.91
5.4.220.0050.02315.74
5.4.210.0000.03415.96
5.4.200.0040.02015.91
5.4.190.0020.02315.80
5.4.180.0040.02615.90
5.4.170.0040.02115.84
5.4.160.0030.03315.81
5.4.150.0050.02316.01
5.4.140.0020.02214.74
5.4.130.0010.02314.57
5.4.120.0030.02714.80
5.4.110.0040.02114.69
5.4.100.0050.02314.68
5.4.90.0040.01914.64
5.4.80.0000.02414.67
5.4.70.0080.01714.70
5.4.60.0060.01714.59
5.4.50.0070.01514.63
5.4.40.0030.02214.66
5.4.30.0010.02114.57
5.4.20.0030.02614.61
5.4.10.0020.02614.67
5.4.00.0030.02214.26
5.3.290.0120.03813.96
5.3.280.0040.03613.91
5.3.270.0090.02213.96
5.3.260.0040.02213.93
5.3.250.0030.02513.94
5.3.240.0100.01613.89
5.3.230.0030.02513.93
5.3.220.0100.01813.89
5.3.210.0040.02413.90
5.3.200.0080.02513.74
5.3.190.0070.02013.81
5.3.180.0040.04513.92
5.3.170.0070.02214.05
5.3.160.0050.02414.04
5.3.150.0060.02313.93
5.3.140.0080.03813.97
5.3.130.0050.03113.85
5.3.120.0090.02613.82
5.3.110.0050.03313.88
5.3.100.0000.03113.66
5.3.90.0050.02913.62
5.3.80.0070.01913.67
5.3.70.0060.03413.62
5.3.60.0060.03313.62
5.3.50.0070.02013.59
5.3.40.0050.02213.65
5.3.30.0050.02013.58
5.3.20.0080.02113.43
5.3.10.0050.02513.30
5.3.00.0050.04213.16
5.2.170.0000.03012.19
5.2.160.0000.03012.19
5.2.150.0030.05012.19
5.2.140.0000.03012.19
5.2.130.0030.02712.19
5.2.120.0000.03012.19
5.2.110.0030.03312.19
5.2.100.0030.04712.19
5.2.90.0030.06312.19
5.2.80.0030.05712.19
5.2.70.0030.06312.19
5.2.60.0030.05012.19
5.2.50.0000.05312.19
5.2.40.0000.03712.19
5.2.30.0000.03012.19
5.2.20.0100.03312.19
5.2.10.0030.05312.19
5.2.00.0000.06012.19
5.1.60.0030.05012.19
5.1.50.0000.05012.19
5.1.40.0000.05312.19
5.1.30.0030.06012.19
5.1.20.0030.03712.19
5.1.10.0000.04312.19
5.1.00.0000.04012.19
5.0.50.0000.03012.19
5.0.40.0000.04712.19
5.0.30.0030.06712.19
5.0.20.0000.04312.19
5.0.10.0030.03712.19
5.0.00.0000.05012.19
4.4.90.0000.03312.19
4.4.80.0000.03312.19
4.4.70.0000.04012.19
4.4.60.0000.02712.19
4.4.50.0000.02012.19
4.4.40.0000.03312.19
4.4.30.0000.03012.19
4.4.20.0000.03312.19
4.4.10.0000.03012.19
4.4.00.0000.04712.19
4.3.110.0000.03712.19
4.3.100.0070.02712.19
4.3.90.0030.03312.19
4.3.80.0000.03312.19
4.3.70.0030.03312.19
4.3.60.0070.03012.19
4.3.50.0000.03312.19
4.3.40.0000.05012.19
4.3.30.0000.03712.19
4.3.20.0030.03712.19
4.3.10.0030.03312.19
4.3.00.0000.03012.19

preferences:
39.01 ms | 401 KiB | 5 Q