3v4l.org

run code in 300+ PHP versions simultaneously
<?php /* Při číselných indexech je první kolize hashe v případě intervalu 1000 se vyhledává v položkách pole, kde kolize klíčů není. Zvětšíme-li hodnotu intervalu (např zmiňovaných 2000000, začneme vyhledávat i v klíčích s kolizí. */ define('INTERVAL', 1000); /* DJBX33A Hash function implemented in PHP */ function DJBX33A($key) { $hash = 5381; if (is_int($key)) { $key = pack("I*", $key); } for ($i = 0, $c = strlen($key); $i < $c; $i++) { $hash = (($hash << 5) + $hash) + ord($key[$i]); } return $hash; } $col = []; $f = false; $arr = []; for ($i = 0; $i < 2000000; $i++) { $arr[$i] = ['a' => 1+1]; $col[DJBX33A($i)] += 1; if(!$f && $col[DJBX33A($i)] > 1) { var_dump(array($i, DJBX33A($i))); $f = true; die(); } //if($i < INTERVAL) $deb[DJBX33A($i)] = $col[DJBX33A($i)]; } $start = microtime(true); for ($i = 0; $i < 1000000; $i++) { $arr[mt_rand(0, INTERVAL-1)]; } $time = microtime(true) - $start; $deb = $col; var_dump(count($deb)); arsort($deb); var_dump(array_slice($deb, 0, 15, true)); var_dump($time);

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)
7.1.70.0000.00916.91
7.1.60.0160.00919.40
7.1.50.0060.01916.80
7.1.00.0000.07022.22
7.0.200.0310.00314.87
7.0.140.0030.07322.10
7.0.120.0000.06022.16
7.0.100.0170.05320.32
7.0.90.0100.08020.27
7.0.80.0170.06020.18
7.0.70.0200.06020.19
7.0.60.0130.07720.29
7.0.50.0100.08720.58
7.0.40.0030.06020.23
7.0.30.0100.08320.19
7.0.20.0100.06020.15
7.0.10.0000.04720.03
7.0.00.0130.07320.09
5.6.280.0000.08021.42
5.6.250.0170.05720.90
5.6.240.0100.06720.93
5.6.230.0130.08321.01
5.6.220.0200.06720.97
5.6.210.0070.05021.07
5.6.200.0200.07721.50
5.6.190.0070.08321.46
5.6.180.0070.04721.39
5.6.170.0070.06021.34
5.6.160.0070.09021.35
5.6.150.0130.08021.39
5.6.140.0070.07721.36
5.6.130.0030.08721.46
5.6.120.0100.04021.40
5.6.110.0070.05321.27
5.6.100.0070.08721.36
5.6.90.0130.08321.39
5.6.80.0100.08020.82
5.6.70.0170.07020.79
5.6.60.0130.07320.73
5.6.50.0270.06320.76
5.6.40.0070.05020.72
5.6.30.0170.06320.69
5.6.20.0100.08020.81
5.6.10.0100.03720.74
5.6.00.0070.04020.69
5.5.380.0100.08020.78
5.5.370.0100.04320.71
5.5.360.0070.08320.71
5.5.350.0100.05720.77
5.5.340.0000.04720.97
5.5.330.0100.05021.06
5.5.320.0070.08021.15
5.5.310.0100.07021.09
5.5.300.0130.05321.16
5.5.290.0170.07721.21
5.5.280.0070.07321.06
5.5.270.0070.08321.07
5.5.260.0100.08021.19
5.5.250.0070.08320.97
5.5.240.0070.07020.54
5.5.230.0000.09020.52
5.5.220.0070.06720.61
5.5.210.0100.07720.60
5.5.200.0100.05320.59
5.5.190.0170.07720.52
5.5.180.0100.07720.54
5.5.160.0070.08020.55
5.5.150.0030.06020.40
5.5.140.0070.08020.31
5.5.130.0030.05720.31
5.5.120.0170.06720.45
5.5.110.0170.07020.59
5.5.100.0130.08020.43
5.5.90.0170.06320.40
5.5.80.0100.08320.48
5.5.70.0100.07020.47
5.5.60.0170.07020.38
5.5.50.0030.08320.41
5.5.40.0070.05020.29
5.5.30.0170.06320.46
5.5.20.0070.08320.48
5.5.10.0070.05020.45
5.5.00.0070.08020.36
5.4.450.0070.08719.62
5.4.440.0100.08319.44
5.4.430.0100.08319.58
5.4.420.0030.08019.79
5.4.410.0170.06019.50
5.4.400.0100.06319.36
5.4.390.0030.05719.45
5.4.380.0070.08019.37
5.4.370.0000.05319.11
5.4.360.0130.05719.29
5.4.350.0170.07319.11
5.4.340.0070.04719.16
5.4.320.0070.06019.36
5.4.310.0030.08019.12
5.4.300.0030.07719.34
5.4.290.0030.06719.26
5.4.280.0070.07719.11
5.4.270.0130.06719.37
5.4.260.0230.06019.26
5.4.250.0130.06319.17
5.4.240.0170.07019.35
5.4.230.0030.07719.20
5.4.220.0100.07719.37
5.4.210.0100.07319.35
5.4.200.0030.05019.11
5.4.190.0170.07019.43
5.4.180.0170.04319.27
5.4.170.0030.08019.35
5.4.160.0070.06319.33
5.4.150.0100.07719.29
5.4.140.0170.07316.71
5.4.130.0130.06316.73
5.4.120.0100.08016.66
5.4.110.0070.07316.64
5.4.100.0070.08016.64
5.4.90.0070.07016.73
5.4.80.0070.07716.75
5.4.70.0070.07016.62
5.4.60.0170.06316.64
5.4.50.0100.07016.63
5.4.40.0130.07016.77
5.4.30.0100.07316.55
5.4.20.0100.07316.73
5.4.10.0100.07016.73
5.4.00.0100.06315.94
5.3.290.0030.06714.60
5.3.280.0130.07014.65
5.3.270.0070.06014.59
5.3.260.0030.05314.55
5.3.250.0100.06714.66
5.3.240.0170.06014.66
5.3.230.0100.07314.69
5.3.220.0130.03314.66
5.3.210.0030.07714.60
5.3.200.0000.08014.70
5.3.190.0070.07014.59
5.3.180.0170.06014.50
5.3.170.0030.06314.66
5.3.160.0070.07314.67
5.3.150.0030.07314.52
5.3.140.0030.07314.67
5.3.130.0070.07714.69
5.3.120.0070.07714.50
5.3.110.0170.06314.57
5.3.100.0100.07014.18
5.3.90.0100.06714.18
5.3.80.0030.04314.18
5.3.70.0130.07014.18
5.3.60.0230.03014.18
5.3.50.0070.07314.18
5.3.40.0100.06714.18
5.3.30.0030.05314.18
5.3.20.0070.06314.18
5.3.10.0070.06714.18
5.3.00.0030.07014.18
5.2.170.0100.06014.18
5.2.160.0000.06314.18
5.2.150.0100.05714.18
5.2.140.0170.04014.18
5.2.130.0070.05714.18
5.2.120.0100.05714.18
5.2.110.0030.03314.18
5.2.100.0070.05314.18
5.2.90.0030.05014.18
5.2.80.0000.06314.18
5.2.70.0030.06014.18
5.2.60.0000.04014.18
5.2.50.0030.05714.18
5.2.40.0070.05714.18
5.2.30.0000.06314.18
5.2.20.0100.05714.18
5.2.10.0000.05314.18
5.2.00.0070.05014.18
5.1.60.0030.05714.18
5.1.50.0000.06014.18
5.1.40.0170.04314.18
5.1.30.0100.05014.18
5.1.20.0030.05714.18
5.1.10.0100.05014.18
5.1.00.0100.04314.18
5.0.50.0030.02314.18
5.0.40.0100.03714.18
5.0.30.0070.05714.18
5.0.20.0030.04014.18
5.0.10.0030.04014.18
5.0.00.0030.06014.18
4.4.90.0030.03714.18
4.4.80.0030.03314.18
4.4.70.0000.03714.18
4.4.60.0030.03714.18
4.4.50.0030.02714.18
4.4.40.0000.05314.18
4.4.30.0030.03314.18
4.4.20.0000.03714.18
4.4.10.0000.02014.18
4.4.00.0000.05314.18
4.3.110.0000.03714.18
4.3.100.0000.02014.18
4.3.90.0130.02314.18
4.3.80.0000.03014.18
4.3.70.0000.03714.18
4.3.60.0030.03014.18
4.3.50.0000.03714.18
4.3.40.0000.05014.18
4.3.30.0000.03714.18
4.3.20.0030.03314.18
4.3.10.0070.03314.18
4.3.00.0000.02714.18

preferences:
37.41 ms | 401 KiB | 5 Q