3v4l.org

run code in 300+ PHP versions simultaneously
<?php function uuid() { $x4 = function() { $n = ''; while (strlen($n) < 4) { $n = $n.mt_rand(); } return substr($n, -4); }; return sprintf( '%s-%04x-%04x-%04x-%04x%04x%04x', time(), $x4(), $x4(), $x4(), $x4(), $x4(), $x4(), $x4() ); } echo uuid();

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)
7.2.00.0060.00619.36
7.1.70.0070.00317.16
7.1.60.0100.01619.46
7.1.50.0110.01517.07
7.1.00.0030.07722.41
7.0.200.0000.01016.46
7.0.140.0000.07721.99
7.0.100.0070.08019.99
7.0.90.0030.09019.95
7.0.80.0100.07020.03
7.0.70.0070.06319.86
7.0.60.0170.07319.89
7.0.50.0100.07320.32
7.0.40.0030.08320.11
7.0.30.0070.08319.91
7.0.20.0070.08320.05
7.0.10.0070.05720.10
7.0.00.0070.09019.95
5.6.280.0000.07320.91
5.6.250.0130.04020.73
5.6.240.0030.05320.70
5.6.230.0100.07320.69
5.6.220.0030.08020.52
5.6.210.0070.07720.75
5.6.200.0100.07720.95
5.6.190.0100.08021.18
5.6.180.0100.07321.05
5.6.170.0100.07021.10
5.6.160.0030.08321.03
5.6.150.0100.08321.11
5.6.140.0030.08320.96
5.6.130.0070.08721.08
5.6.120.0130.07021.05
5.6.110.0170.05321.00
5.6.100.0100.08321.09
5.6.90.0130.04721.07
5.6.80.0100.07320.43
5.6.70.0100.07320.50
5.6.60.0070.08320.49
5.6.50.0100.08020.48
5.6.40.0170.07320.37
5.6.30.0030.07720.38
5.6.20.0100.08020.32
5.6.10.0070.07720.38
5.6.00.0130.07720.37
5.5.380.0130.07720.43
5.5.370.0130.07320.45
5.5.360.0030.08720.32
5.5.350.0030.07720.39
5.5.340.0070.04720.79
5.5.330.0100.08020.65
5.5.320.0270.06320.91
5.5.310.0030.08720.90
5.5.300.0100.05320.89
5.5.290.0130.07320.89
5.5.280.0170.06720.91
5.5.270.0070.05320.77
5.5.260.0100.07020.89
5.5.250.0130.05320.55
5.5.240.0070.07320.30
5.5.230.0100.08020.31
5.5.220.0170.06720.18
5.5.210.0170.04720.02
5.5.200.0070.08020.16
5.5.190.0070.07720.00
5.5.180.0130.07020.24
5.5.160.0200.06320.19
5.5.150.0100.07720.23
5.5.140.0000.08020.24
5.5.130.0100.07320.21
5.5.120.0170.07020.12
5.5.110.0130.07020.25
5.5.100.0130.08020.17
5.5.90.0130.07320.16
5.5.80.0170.05320.15
5.5.70.0130.06720.04
5.5.60.0130.03320.06
5.5.50.0100.07320.01
5.5.40.0100.06720.14
5.5.30.0100.08020.07
5.5.20.0070.04719.95
5.5.10.0030.08320.04
5.5.00.0030.08720.13
5.4.450.0070.07719.36
5.4.440.0030.04319.47
5.4.430.0130.07719.45
5.4.420.0130.07719.41
5.4.410.0130.07019.10
5.4.400.0100.07019.28
5.4.390.0170.06019.13
5.4.380.0070.07319.13
5.4.370.0030.06718.90
5.4.360.0030.06719.23
5.4.350.0070.07018.92
5.4.340.0030.04319.13
5.4.320.0100.04718.85
5.4.310.0130.07018.85
5.4.300.0070.07719.12
5.4.290.0000.06018.90
5.4.280.0100.05719.23
5.4.270.0100.05718.87
5.4.260.0130.06318.85
5.4.250.0130.07319.14
5.4.240.0100.06019.09
5.4.230.0130.06019.04
5.4.220.0100.07019.05
5.4.210.0070.05319.18
5.4.200.0070.07719.15
5.4.190.0070.07018.95
5.4.180.0100.07319.11
5.4.170.0070.07719.07
5.4.160.0070.07719.03
5.4.150.0130.07319.01
5.4.140.0070.04016.50
5.4.130.0100.06716.50
5.4.120.0070.06716.47
5.4.110.0100.03016.35
5.4.100.0030.07316.48
5.4.90.0100.02716.42
5.4.80.0130.07016.51
5.4.70.0170.06716.54
5.4.60.0100.06316.37
5.4.50.0100.05316.47
5.4.40.0030.07716.30
5.4.30.0100.07316.33
5.4.20.0070.07316.47
5.4.10.0030.07016.43
5.4.00.0000.05315.78
5.3.290.0170.06314.66
5.3.280.0030.08014.61
5.3.270.0130.05314.68
5.3.260.0100.06714.61
5.3.250.0000.08014.67
5.3.240.0100.07314.53
5.3.230.0130.03314.63
5.3.220.0100.07314.71
5.3.210.0070.08014.56
5.3.200.0100.05314.54
5.3.190.0030.08014.58
5.3.180.0030.04014.70
5.3.170.0100.07014.65
5.3.160.0200.07014.62
5.3.150.0170.04714.71
5.3.140.0170.06714.56
5.3.130.0100.05714.56
5.3.120.0070.06714.52
5.3.110.0070.07714.48
5.3.100.0070.08014.04
5.3.90.0070.06713.98
5.3.80.0070.05713.94
5.3.70.0170.06313.97
5.3.60.0030.07314.15
5.3.50.0030.06713.94
5.3.40.0100.07014.07
5.3.30.0070.05314.01
5.3.20.0100.06313.64
5.3.10.0100.04313.69
5.3.00.0030.07713.63
5.2.170.0000.04311.29
5.2.160.0000.04011.29
5.2.150.0030.04011.29
5.2.140.0100.06011.29
5.2.130.0070.05011.29
5.2.120.0100.05011.29
5.2.110.0030.04311.29
5.2.100.0070.04711.29
5.2.90.0030.06011.29
5.2.80.0100.05711.29
5.2.70.0070.03711.29
5.2.60.0070.06311.29
5.2.50.0030.06711.29
5.2.40.0000.03711.29
5.2.30.0030.06311.29
5.2.20.0100.05011.29
5.2.10.0100.02711.29
5.2.00.0100.05311.29
5.1.60.0030.04711.29
5.1.50.0070.05011.29
5.1.40.0030.03711.29
5.1.30.0100.04311.29
5.1.20.0100.05011.29
5.1.10.0070.04311.29
5.1.00.0000.05311.29
5.0.50.0000.05011.29
5.0.40.0030.04311.29
5.0.30.0070.06011.29
5.0.20.0030.04311.29
5.0.10.0030.03011.29
5.0.00.0000.07011.29
4.4.90.0000.02711.29
4.4.80.0000.02011.29
4.4.70.0070.01711.29
4.4.60.0030.03711.29
4.4.50.0030.01711.29
4.4.40.0000.05311.29
4.4.30.0000.03311.29
4.4.20.0030.03711.29
4.4.10.0000.03711.29
4.4.00.0000.05311.29
4.3.110.0030.02011.29
4.3.100.0100.02011.29
4.3.90.0000.03711.29
4.3.80.0000.05711.29
4.3.70.0000.02711.29
4.3.60.0000.02311.29
4.3.50.0000.02311.29
4.3.40.0000.02711.29
4.3.30.0070.03311.29
4.3.20.0030.02311.29
4.3.10.0000.02711.29
4.3.00.0000.03711.29

preferences:
37.63 ms | 401 KiB | 5 Q