3v4l.org

run code in 300+ PHP versions simultaneously
<?php function uuid($c = 4) { $x = function($c) { for ($n = ''; strlen($n) < $c + 1; $n = $n.base_convert(mt_rand(), 10, 16)); return substr($n, -$c); }; return microtime(true) * 10000.'-'.$x($c).'-'.$x($c).'-'.$x($c).'-'.$x($c).'-'.$x($c).'-'.$x($c) ; return sprintf( '%x-%s-%s-%s-%s%s%s', microtime(true) * 10000, $x($c), $x($c), $x($c), $x($c), $x($c), $x($c) ); } $time = microtime(); $uuids = array(); for ($i = 0; $i < 100; $i++) { $uuids[] = uuid(); } if (count(array_unique($uuids)) != count($uuids)) { echo 'DUPLICATED'; } else { echo 'No duplicate'; print_r($uuids); }

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)
5.4.320.0050.03712.53
5.4.310.0040.04012.52
5.4.300.0090.03212.53
5.4.290.0020.04112.52
5.4.280.0060.04012.42
5.4.270.0050.04112.41
5.4.260.0090.03812.41
5.4.250.0070.03512.42
5.4.240.0040.04112.41
5.4.230.0050.03812.41
5.4.220.0060.03512.41
5.4.210.0050.03612.41
5.4.200.0080.03612.41
5.4.190.0070.03412.41
5.4.180.0060.04312.41
5.4.170.0050.03612.41
5.4.160.0060.04212.41
5.4.150.0080.03412.40
5.4.140.0030.03912.09
5.4.130.0060.03412.07
5.4.120.0040.03612.04
5.4.110.0080.03212.03
5.4.100.0040.03612.04
5.4.90.0040.03712.03
5.4.80.0090.03412.03
5.4.70.0040.03812.03
5.4.60.0100.04312.03
5.4.50.0100.03112.03
5.4.40.0060.04812.02
5.4.30.0060.03912.01
5.4.20.0050.03512.01
5.4.10.0090.03112.02
5.4.00.0090.03211.50
5.3.290.0050.04012.80
5.3.280.0100.03912.70
5.3.270.0060.03912.72
5.3.260.0040.04012.72
5.3.250.0040.04012.72
5.3.240.0070.03512.72
5.3.230.0050.04312.71
5.3.220.0080.03512.68
5.3.210.0070.03712.68
5.3.200.0090.03312.68
5.3.190.0050.03812.68
5.3.180.0070.03512.68
5.3.170.0050.03712.67
5.3.160.0060.04112.67
5.3.150.0080.03512.67
5.3.140.0070.03612.66
5.3.130.0100.04412.66
5.3.120.0050.04012.66
5.3.110.0050.04112.66
5.3.100.0090.04712.13
5.3.90.0020.04012.11
5.3.80.0080.03712.10
5.3.70.0070.03512.10
5.3.60.0100.03212.09
5.3.50.0050.03612.03
5.3.40.0040.03712.03
5.3.30.0060.03311.98
5.3.20.0060.04011.77
5.3.10.0070.03711.74
5.3.00.0070.03411.72
5.2.170.0040.0379.22
5.2.160.0030.0309.22
5.2.150.0060.0369.22
5.2.140.0060.0319.21
5.2.130.0060.0319.17
5.2.120.0060.0289.17
5.2.110.0050.0289.18
5.2.100.0050.0289.18
5.2.90.0070.0269.18
5.2.80.0060.0289.17
5.2.70.0050.0299.17
5.2.60.0050.0289.12
5.2.50.0030.0399.09
5.2.40.0030.0319.07
5.2.30.0090.0289.05
5.2.20.0050.0309.04
5.2.10.0030.0298.95
5.2.00.0030.0328.81
5.1.60.0070.0248.09
5.1.50.0040.0248.08
5.1.40.0060.0238.07
5.1.30.0050.0258.42
5.1.20.0060.0248.43
5.1.10.0110.0268.16
5.1.00.0040.0258.16
5.0.50.0050.0196.64
5.0.40.0070.0156.50
5.0.30.0030.0316.31
5.0.20.0030.0196.28
5.0.10.0040.0196.25
5.0.00.0020.0326.25
4.4.90.0030.0144.78
4.4.80.0040.0144.75
4.4.70.0020.0164.75
4.4.60.0040.0144.75
4.4.50.0010.0164.77
4.4.40.0010.0264.71
4.4.30.0030.0144.75
4.4.20.0030.0154.85
4.4.10.0060.0144.85
4.4.00.0020.0254.76
4.3.110.0030.0154.66
4.3.100.0020.0164.66
4.3.90.0020.0164.63
4.3.80.0020.0264.58
4.3.70.0040.0134.63
4.3.60.0020.0154.63
4.3.50.0010.0174.63
4.3.40.0030.0294.54
4.3.30.0030.0153.30
4.3.20.0010.0163.27
4.3.10.0000.0183.24
4.3.00.0070.0207.72

preferences:
135.82 ms | 1398 KiB | 7 Q