3v4l.org

run code in 300+ PHP versions simultaneously
<?php class AliasPool { protected static $i = 0; public static function get () { $alias = ''; $j = self::$i; $done = false; while (!$done) { if ($j == 0) { $done = true; } $alias = chr(($j % 26) + ord('a')) . $alias; $j = floor($j / 26); } self::$i++; return $alias; } } for ($i = 0; $i < 60; ++$i) { var_dump(AliasPool::get()); print "\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)
8.3.40.0000.01518.79
8.3.30.0040.01119.21
8.3.20.0040.00420.32
8.3.10.0050.00323.60
8.3.00.0040.00420.87
8.2.170.0120.00922.96
8.2.160.0110.00320.53
8.2.150.0000.00924.18
8.2.140.0030.00524.66
8.2.130.0000.00826.16
8.2.120.0040.00421.04
8.2.110.0090.00022.21
8.2.100.0070.00418.16
8.2.90.0040.00419.36
8.2.80.0080.00017.97
8.2.70.0050.00317.75
8.2.60.0030.00518.16
8.2.50.0050.00518.07
8.2.40.0030.00519.89
8.2.30.0030.00618.20
8.2.20.0040.00417.77
8.2.10.0070.00018.19
8.2.00.0040.00417.71
8.1.270.0050.00323.67
8.1.260.0060.00326.35
8.1.250.0050.00328.09
8.1.240.0040.00423.69
8.1.230.0070.00719.21
8.1.220.0060.00317.88
8.1.210.0030.00618.77
8.1.200.0040.00417.48
8.1.190.0050.00317.13
8.1.180.0030.00618.10
8.1.170.0040.00418.52
8.1.160.0000.00722.07
8.1.150.0040.00418.68
8.1.140.0040.00417.51
8.1.130.0000.00717.85
8.1.120.0040.00417.54
8.1.110.0030.00517.52
8.1.100.0000.00717.50
8.1.90.0000.00717.40
8.1.80.0040.00417.51
8.1.70.0040.00417.48
8.1.60.0030.00517.64
8.1.50.0040.00417.53
8.1.40.0060.00317.55
8.1.30.0040.00417.75
8.1.20.0040.00417.61
8.1.10.0020.00517.65
8.1.00.0070.00017.49
8.0.300.0060.00318.77
8.0.290.0030.00616.72
8.0.280.0000.00718.51
8.0.270.0040.00417.30
8.0.260.0030.00517.38
8.0.250.0070.00016.89
8.0.240.0000.00616.99
8.0.230.0000.00816.91
8.0.220.0030.00316.83
8.0.210.0030.00716.92
8.0.200.0030.00316.87
8.0.190.0050.00217.05
8.0.180.0000.01216.89
8.0.170.0040.00417.00
8.0.160.0070.00017.02
8.0.150.0060.00316.86
8.0.140.0050.00216.93
8.0.130.0000.00713.47
8.0.120.0040.00416.93
8.0.110.0050.00316.85
8.0.100.0030.00516.82
8.0.90.0030.00516.84
8.0.80.0070.00716.99
8.0.70.0080.00016.93
8.0.60.0050.00316.81
8.0.50.0050.00316.86
8.0.30.0080.01516.84
8.0.20.0090.01117.40
8.0.10.0000.00717.02
8.0.00.0060.01616.75
7.4.330.0050.00015.19
7.4.320.0030.00316.61
7.4.300.0000.00616.67
7.4.290.0000.00716.47
7.4.280.0020.00516.67
7.4.270.0070.00016.61
7.4.260.0030.00616.64
7.4.250.0040.00416.67
7.4.240.0060.00116.60
7.4.230.0000.00716.55
7.4.220.0070.01116.77
7.4.210.0030.01616.55
7.4.200.0000.00816.73
7.4.160.0180.00016.68
7.4.150.0070.01417.40
7.4.140.0130.00717.86
7.4.130.0140.00816.55
7.4.120.0130.00916.51
7.4.110.0120.00616.61
7.4.100.0190.00316.47
7.4.90.0130.00616.56
7.4.80.0110.01419.39
7.4.70.0030.01516.72
7.4.60.0090.00916.62
7.4.50.0040.00416.55
7.4.40.0100.01016.72
7.4.30.0170.00016.61
7.4.00.0090.00915.17
7.3.330.0050.00013.37
7.3.320.0000.00513.34
7.3.310.0000.00816.27
7.3.300.0030.00316.42
7.3.290.0070.00716.41
7.3.280.0120.00816.41
7.3.270.0100.01017.40
7.3.260.0130.00616.43
7.3.250.0200.00716.65
7.3.240.0080.01216.35
7.3.230.0120.00616.39
7.3.210.0150.00616.54
7.3.200.0070.01319.39
7.3.190.0150.00316.38
7.3.180.0160.00316.70
7.3.170.0080.00916.39
7.3.160.0180.00316.43
7.3.120.0120.00614.89
7.2.330.0120.00716.52
7.2.320.0040.01516.90
7.2.310.0110.00816.68
7.2.300.0130.00616.78
7.2.290.0140.00416.88
7.2.60.0000.01216.87
7.2.00.0040.00919.52
7.1.200.0090.00615.63
7.1.100.0060.00918.09
7.1.70.0050.00317.25
7.1.60.0210.00319.70
7.1.50.0040.01516.59
7.1.00.0030.07722.57
7.0.200.0050.00316.88
7.0.140.0070.07022.00
7.0.110.0070.03719.93
7.0.100.0100.02720.05
7.0.90.0300.03320.05
7.0.80.0000.03719.94
7.0.70.0130.04019.93
7.0.60.0100.04020.05
7.0.50.0070.05019.86
7.0.40.0030.04319.74
7.0.30.0030.08019.73
7.0.20.0030.04019.69
7.0.10.0030.07719.70
7.0.00.0030.03719.78
5.6.280.0070.06720.79
5.6.260.0000.03720.68
5.6.250.0030.04320.75
5.6.240.0070.03320.66
5.6.230.0100.04720.57
5.6.220.0030.03320.63
5.6.210.0170.03320.56
5.6.200.0000.04720.57
5.6.190.0000.04320.55
5.6.180.0070.03320.56
5.6.170.0000.04020.61
5.6.160.0070.04020.60
5.6.150.0070.08320.61
5.6.140.0070.07320.70
5.6.130.0030.04320.62
5.6.120.0000.09020.65
5.6.110.0030.04020.64
5.6.100.0070.04720.61
5.6.90.0070.07020.64
5.6.80.0070.06019.95
5.6.70.0230.06020.02
5.6.60.0070.08019.93
5.6.50.0100.07319.98
5.6.40.0030.05019.98
5.6.30.0030.04020.00
5.6.20.0100.04020.04
5.6.10.0070.07319.95
5.6.00.0030.04319.91
5.5.380.0030.04317.56
5.5.370.0070.03017.55
5.5.360.0070.03317.58
5.5.350.0030.03317.65
5.5.340.0030.04018.27
5.5.330.0030.04718.10
5.5.320.0100.07718.10
5.5.310.0070.07318.13
5.5.300.0070.04318.25
5.5.290.0070.08018.12
5.5.280.0070.07718.09
5.5.270.0130.07318.24
5.5.260.0130.06018.24
5.5.250.0070.04718.04
5.5.240.0100.03317.61
5.5.230.0130.07317.63
5.5.220.0130.07717.46
5.5.210.0100.06017.42
5.5.200.0070.07717.45
5.5.190.0030.06317.61
5.5.180.0000.07317.48
5.5.160.0000.07717.48
5.5.150.0070.07717.60
5.5.140.0230.02717.25
5.5.130.0100.06017.39
5.5.120.0100.06317.23
5.5.110.0100.06717.23
5.5.100.0200.06717.07
5.5.90.0100.03717.31
5.5.80.0100.04017.08
5.5.70.0030.04317.29
5.5.60.0200.05717.20
5.5.50.0000.05017.37
5.5.40.0200.06717.15
5.5.30.0100.07317.41
5.5.20.0030.04717.41
5.5.10.0000.04717.31
5.5.00.0030.07017.32
5.4.450.0030.05019.54
5.4.440.0070.08019.31
5.4.430.0070.07719.66
5.4.420.0030.07319.50
5.4.410.0100.03319.18
5.4.400.0070.04719.09
5.4.390.0130.05719.17
5.4.380.0100.06319.20
5.4.370.0030.08019.24
5.4.360.0100.04018.95
5.4.350.0000.08019.22
5.4.340.0030.05718.99
5.4.320.0100.06719.18
5.4.310.0000.05019.18
5.4.300.0000.04019.18
5.4.290.0030.04018.95
5.4.280.0030.05319.09
5.4.270.0100.07018.99
5.4.260.0070.07319.00
5.4.250.0030.05719.00
5.4.240.0130.07319.08
5.4.230.0100.07018.98
5.4.220.0200.05019.30
5.4.210.0070.07318.98
5.4.200.0070.04319.00
5.4.190.0100.03718.93
5.4.180.0070.07019.22
5.4.170.0070.04018.99
5.4.160.0070.06018.98
5.4.150.0130.07719.01
5.4.140.0100.06016.36
5.4.130.0030.05316.34
5.4.120.0030.04316.59
5.4.110.0100.07316.50
5.4.100.0070.05016.57
5.4.90.0030.07316.51
5.4.80.0030.07316.45
5.4.70.0130.05016.39
5.4.60.0100.07316.39
5.4.50.0000.05316.44
5.4.40.0070.05316.43
5.4.30.0070.07016.43
5.4.20.0100.05716.53
5.4.10.0070.06716.54
5.4.00.0030.05016.00
5.3.290.0070.07014.89
5.3.280.0100.07314.68
5.3.270.0030.07714.60
5.3.260.0130.04014.46
5.3.250.0100.04314.63
5.3.240.0070.04014.61
5.3.230.0070.06714.59
5.3.220.0070.06314.57
5.3.210.0100.07014.54
5.3.200.0100.06714.57
5.3.190.0100.07714.60
5.3.180.0070.07314.59
5.3.170.0170.06314.55
5.3.160.0030.04714.57
5.3.150.0000.04314.55
5.3.140.0070.05714.57
5.3.130.0030.05014.63
5.3.120.0170.05314.57
5.3.110.0030.04714.62
5.3.100.0100.03014.06
5.3.90.0030.03714.03
5.3.80.0100.03014.11
5.3.70.0030.05014.11
5.3.60.0130.05313.96
5.3.50.0130.05013.95
5.3.40.0070.06014.18
5.3.30.0030.05313.96
5.3.20.0070.05013.64
5.3.10.0100.03313.71
5.3.00.0070.06713.77
5.2.170.0130.05312.02
5.2.160.0070.03312.02
5.2.150.0070.07012.02
5.2.140.0000.03312.02
5.2.130.0130.05712.02
5.2.120.0070.03712.02
5.2.110.0030.03312.02
5.2.100.0030.05312.02
5.2.90.0030.06012.02
5.2.80.0000.04712.02
5.2.70.0130.02712.02
5.2.60.0070.05012.02
5.2.50.0030.04712.02
5.2.40.0070.03012.02
5.2.30.0030.04312.02
5.2.20.0030.06312.02
5.2.10.0100.05712.02
5.2.00.0000.03712.02
5.1.60.0000.03312.02
5.1.50.0030.02312.02
5.1.40.0030.05012.02
5.1.30.0070.04012.02
5.1.20.0000.04312.02
5.1.10.0030.03712.02
5.1.00.0030.05312.02
5.0.50.0070.04312.02
5.0.40.0070.04012.02
5.0.30.0030.04712.02
5.0.20.0000.02312.02
5.0.10.0000.03012.02
5.0.00.0070.05012.02
4.4.90.0030.02312.02
4.4.80.0000.01712.02
4.4.70.0030.02312.02
4.4.60.0000.02012.02
4.4.50.0030.02312.02
4.4.40.0000.03012.02
4.4.30.0000.03012.02
4.4.20.0000.02312.02
4.4.10.0070.02312.02
4.4.00.0070.04012.02
4.3.110.0070.02312.02
4.3.100.0000.02012.02
4.3.90.0000.01712.02
4.3.80.0030.03312.02
4.3.70.0000.02012.02
4.3.60.0030.02012.02
4.3.50.0030.01712.02
4.3.40.0000.03312.02
4.3.30.0000.03012.02
4.3.20.0000.03712.02
4.3.10.0000.03012.02
4.3.00.0000.03312.02

preferences:
109.97 ms | 400 KiB | 5 Q