Online PHP editor | perf for hehIZ

<?php class UUID { /** * Generates version 1: MAC address */ public static function v1() { if (!function_exists('uuid_create')) return false; uuid_create(&$context); uuid_make($context, UUID_MAKE_V1); uuid_export($context, UUID_FMT_STR, &$uuid); return trim($uuid); } /** * Generates version 3 UUID: MD5 hash of URL */ public static function v3($i_url) { if (!function_exists('uuid_create')) return false; if (!strlen($i_url)) $i_url = self::v1(); uuid_create(&$context); uuid_create(&$namespace); uuid_make($context, UUID_MAKE_V3, $namespace, $i_url); uuid_export($context, UUID_FMT_STR, &$uuid); return trim($uuid); } /** * Generates version 4 UUID: random */ public static function v4() { if (!function_exists('uuid_create')) return false; uuid_create(&$context); uuid_make($context, UUID_MAKE_V4); uuid_export($context, UUID_FMT_STR, &$uuid); return trim($uuid); } /** * Generates version 5 UUID: SHA-1 hash of URL */ public static function v5($i_url) { if (!function_exists('uuid_create')) return false; if (!strlen($i_url)) $i_url = self::v1(); uuid_create(&$context); uuid_create(&$namespace); uuid_make($context, UUID_MAKE_V5, $namespace, $i_url); uuid_export($context, UUID_FMT_STR, &$uuid); return trim($uuid); } } ?> And here's a demonstration: <?php for ($i = 1; $i <= 3; ++$i) { echo 'microtime = ' . microtime(true) . ' '; echo "V1 UUID: " . UUID::v1() . ' '; echo "V3 UUID of URL='abc': " . UUID::v3('abc') . ' '; echo "V4 UUID: " . UUID::v4() . ' '; echo "V5 UUID of URL=null: " . UUID::v5(null) . ' '; echo '<hr/>'; } ?>

Version	System time (s)	User time (s)	Memory (MiB)
5.4.30	0.006	0.038	12.51
5.4.29	0.013	0.032	12.51
5.4.28	0.005	0.038	12.41
5.4.27	0.011	0.032	12.41
5.4.26	0.008	0.037	12.41
5.4.25	0.010	0.033	12.41
5.4.24	0.007	0.038	12.40
5.4.23	0.006	0.039	12.40
5.4.22	0.008	0.035	12.40
5.4.21	0.007	0.052	12.40
5.4.20	0.008	0.041	12.40
5.4.19	0.006	0.053	12.39
5.4.18	0.005	0.043	12.39
5.4.17	0.009	0.050	12.41
5.4.16	0.008	0.048	12.40
5.4.15	0.009	0.033	12.39
5.4.14	0.004	0.039	12.08
5.4.13	0.008	0.040	12.07
5.4.12	0.005	0.036	12.02
5.4.11	0.004	0.039	12.03
5.4.10	0.005	0.041	12.03
5.4.9	0.005	0.038	12.02
5.4.8	0.006	0.038	12.03
5.4.7	0.011	0.038	12.02
5.4.6	0.007	0.051	12.02
5.4.5	0.008	0.051	12.02
5.4.4	0.006	0.041	12.01
5.4.3	0.006	0.040	12.00
5.4.2	0.012	0.039	12.00
5.4.1	0.010	0.039	12.00
5.4.0	0.006	0.038	11.50
5.3.29	0.005	0.042	12.80
5.3.28	0.007	0.040	12.70
5.3.27	0.006	0.042	12.72
5.3.26	0.005	0.040	12.72
5.3.25	0.008	0.035	12.72
5.3.24	0.007	0.040	12.72
5.3.23	0.005	0.042	12.71
5.3.22	0.007	0.053	12.68
5.3.21	0.007	0.041	12.68
5.3.20	0.012	0.033	12.68
5.3.19	0.007	0.039	12.67
5.3.18	0.005	0.040	12.68
5.3.17	0.010	0.046	12.67
5.3.16	0.006	0.040	12.67
5.3.15	0.004	0.042	12.68
5.3.14	0.010	0.037	12.66
5.3.13	0.009	0.058	12.66
5.3.12	0.008	0.061	12.65
5.3.11	0.009	0.056	12.65
5.3.10	0.009	0.050	12.15
5.3.9	0.003	0.057	12.12
5.3.8	0.008	0.052	12.11
5.3.7	0.007	0.053	12.12

Version

System time (s)

User time (s)

Memory (MiB)

5.4.30

0.006

0.038

12.51

5.4.29

0.013

0.032

12.51

5.4.28

0.005

0.038

12.41

5.4.27

0.011

0.032

12.41

5.4.26

0.008

0.037

12.41

5.4.25

0.010

0.033

12.41

5.4.24

0.007

0.038

12.40

5.4.23

0.006

0.039

12.40

5.4.22

0.008

0.035

12.40

5.4.21

0.007

0.052

12.40

5.4.20

0.008

0.041

12.40

5.4.19

0.006

0.053

12.39

5.4.18

0.005

0.043

12.39

5.4.17

0.009

0.050

12.41

5.4.16

0.008

0.048

12.40

5.4.15

0.009

0.033

12.39

5.4.14

0.004

0.039

12.08

5.4.13

0.008

0.040

12.07

5.4.12

0.005

0.036

12.02

5.4.11

0.004

0.039

12.03

5.4.10

0.005

0.041

12.03

5.4.9

0.005

0.038

12.02

5.4.8

0.006

0.038

12.03

5.4.7

0.011

0.038

12.02

5.4.6

0.007

0.051

12.02

5.4.5

0.008

0.051

12.02

5.4.4

0.006

0.041

12.01

5.4.3

0.006

0.040

12.00

5.4.2

0.012

0.039

12.00

5.4.1

0.010

0.039

12.00

5.4.0

0.006

0.038

11.50

5.3.29

0.005

0.042

12.80

5.3.28

0.007

0.040

12.70

5.3.27

0.006

0.042

12.72

5.3.26

0.005

0.040

12.72

5.3.25

0.008

0.035

12.72

5.3.24

0.007

0.040

12.72

5.3.23

0.005

0.042

12.71

5.3.22

0.007

0.053

12.68

5.3.21

0.007

0.041

12.68

5.3.20

0.012

0.033

12.68

5.3.19

0.007

0.039

12.67

5.3.18

0.005

0.040

12.68

5.3.17

0.010

0.046

12.67

5.3.16

0.006

0.040

12.67

5.3.15

0.004

0.042

12.68

5.3.14

0.010

0.037

12.66

5.3.13

0.009

0.058

12.66

5.3.12

0.008

0.061

12.65

5.3.11

0.009

0.056

12.65

5.3.10

0.009

0.050

12.15

5.3.9

0.003

0.057

12.12

5.3.8

0.008

0.052

12.11

5.3.7

0.007

0.053

12.12