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)
7.2.00.0070.00719.44
7.1.70.0000.00917.36
7.1.60.0040.01519.32
7.1.50.0000.01116.85
7.1.00.0000.06722.48
7.0.200.0000.00816.80
7.0.140.0000.07721.97
7.0.100.0170.07719.99
7.0.90.0130.08019.89
7.0.80.0170.07319.94
7.0.70.0200.06719.95
7.0.60.0070.08320.01
7.0.50.0270.07320.28
7.0.40.0130.08320.18
7.0.30.0170.06720.04
7.0.20.0170.04720.13
7.0.10.0130.07320.09
7.0.00.0030.05720.09
5.6.280.0030.07321.11
5.6.250.0130.06720.79
5.6.240.0100.08320.63
5.6.230.0070.09020.72
5.6.220.0030.05020.70
5.6.210.0070.07020.51
5.6.200.0200.07321.10
5.6.190.0100.03721.08
5.6.180.0170.06021.15
5.6.170.0130.07721.09
5.6.160.0170.07321.20
5.6.150.0100.07020.98
5.6.140.0170.06721.05
5.6.130.0070.08721.06
5.6.120.0030.05321.09
5.6.110.0130.07321.11
5.6.100.0070.07021.11
5.6.90.0130.08321.12
5.6.80.0130.07020.48
5.6.70.0100.08320.46
5.6.60.0100.07720.48
5.6.50.0030.08720.43
5.6.40.0030.07320.41
5.6.30.0230.06320.41
5.6.20.0070.04720.34
5.6.10.0030.06720.35
5.6.00.0030.05020.42
5.5.380.0170.06320.55
5.5.370.0070.08320.43
5.5.360.0170.08020.38
5.5.350.0070.08020.35
5.5.340.0100.08720.91
5.5.330.0030.08320.84
5.5.320.0100.06020.79
5.5.310.0100.05020.91
5.5.300.0070.05020.83
5.5.290.0000.05020.95
5.5.280.0030.04720.67
5.5.270.0030.08020.89
5.5.260.0070.08720.85
5.5.250.0130.07020.61
5.5.240.0000.05320.15
5.5.230.0130.04320.23
5.5.220.0070.07320.31
5.5.210.0070.08020.19
5.5.200.0070.07720.15
5.5.190.0100.07020.16
5.5.180.0100.08020.14
5.5.160.0270.05720.25
5.5.150.0070.07020.29
5.5.140.0200.06320.27
5.5.130.0170.06320.16
5.5.120.0100.06720.15
5.5.110.0070.07020.11
5.5.100.0100.07320.19
5.5.90.0070.07720.16
5.5.80.0070.05720.19
5.5.70.0170.06720.09
5.5.60.0130.07720.18
5.5.50.0130.06720.11
5.5.40.0200.06320.09
5.5.30.0100.07320.19
5.5.20.0000.05320.13
5.5.10.0030.07320.07
5.5.00.0130.06720.07
5.4.450.0100.08019.37
5.4.440.0070.08319.20
5.4.430.0100.04319.27
5.4.420.0100.07719.20
5.4.410.0070.08019.43
5.4.400.0100.07719.04
5.4.390.0100.07318.84
5.4.380.0100.06318.91
5.4.370.0100.07019.15
5.4.360.0030.07318.88
5.4.350.0130.07018.95
5.4.340.0170.07019.02
5.4.320.0030.05718.88
5.4.310.0100.07319.04
5.4.300.0130.07318.95
5.4.290.0100.04018.84
5.4.280.0100.07019.08
5.4.270.0100.07719.12
5.4.260.0070.07319.12
5.4.250.0100.07319.18
5.4.240.0070.05319.20
5.4.230.0000.08019.11
5.4.220.0100.04318.89
5.4.210.0170.07018.86
5.4.200.0070.06318.84
5.4.190.0030.08019.08
5.4.180.0130.06019.11
5.4.170.0070.06319.02
5.4.160.0130.07319.21
5.4.150.0100.06319.02
5.4.140.0170.05716.46
5.4.130.0100.07316.38
5.4.120.0130.06716.38
5.4.110.0000.07316.48
5.4.100.0100.06316.40
5.4.90.0030.08016.56
5.4.80.0070.07016.36
5.4.70.0200.05016.33
5.4.60.0070.05716.41
5.4.50.0070.07316.52
5.4.40.0070.06716.35
5.4.30.0100.07316.35
5.4.20.0170.06016.45
5.4.10.0000.06716.48
5.4.00.0100.06715.96
5.3.290.0070.08014.69
5.3.280.0000.06014.63
5.3.270.0100.07714.64
5.3.260.0100.07314.78
5.3.250.0100.07014.82
5.3.240.0030.08714.63
5.3.230.0100.07014.68
5.3.220.0130.07014.79
5.3.210.0170.06714.62
5.3.200.0200.06314.59
5.3.190.0170.06314.63
5.3.180.0030.07714.65
5.3.170.0070.08014.59
5.3.160.0070.04014.60
5.3.150.0070.07714.59
5.3.140.0000.08314.74
5.3.130.0100.07714.57
5.3.120.0070.07714.54
5.3.110.0100.06314.68
5.3.100.0000.08314.11
5.3.90.0130.06714.07
5.3.80.0030.04714.10
5.3.70.0000.04314.21
5.3.60.0070.07013.96
5.3.50.0030.07014.01
5.3.40.0070.07013.95
5.3.30.0070.04314.03
5.3.20.0030.04313.88
5.3.10.0030.05313.88
5.3.00.0030.07713.80
5.2.170.0130.05711.29
5.2.160.0070.06011.33
5.2.150.0100.06011.15
5.2.140.0070.06311.33
5.2.130.0070.06011.25
5.2.120.0070.05711.32
5.2.110.0030.06011.08
5.2.100.0100.04711.18
5.2.90.0130.04011.10
5.2.80.0100.05711.27
5.2.70.0070.05011.29
5.2.60.0070.05311.14
5.2.50.0100.06011.11
5.2.40.0030.03010.98
5.2.30.0030.03010.94
5.2.20.0000.06011.14
5.2.10.0070.05010.84
5.2.00.0070.03010.66
5.1.60.0070.05010.19
5.1.50.0100.04710.09
5.1.40.0100.04310.14
5.1.30.0000.05310.28
5.1.20.0030.03010.58
5.1.10.0000.05010.04
5.1.00.0070.04710.07
5.0.50.0070.0238.57
5.0.40.0030.0438.49
5.0.30.0070.0638.49
5.0.20.0070.0408.49
5.0.10.0030.0478.49
5.0.00.0030.0638.49
4.4.90.0030.0238.49
4.4.80.0030.0308.49
4.4.70.0030.0338.49
4.4.60.0100.0208.49
4.4.50.0000.0278.49
4.4.40.0030.0538.49
4.4.30.0030.0378.49
4.4.20.0000.0408.49
4.4.10.0000.0308.49
4.4.00.0000.0538.49
4.3.110.0030.0238.49
4.3.100.0100.0278.49
4.3.90.0000.0338.49
4.3.80.0000.0578.49
4.3.70.0070.0138.49
4.3.60.0070.0308.49
4.3.50.0000.0308.49
4.3.40.0000.0408.49
4.3.30.0030.0278.49
4.3.20.0000.0208.49
4.3.10.0000.0308.49
4.3.00.0000.0178.49

preferences:
36.35 ms | 401 KiB | 5 Q