Ha - the irony of you and I posting a message about uniqueness at pretty much the same time :). On 3 Mar 2015 20:11, "Lucas Bradstreet" <lucasbradstr...@gmail.com> wrote:
> Hi, > > Nice work! > > I wanted to clarify something: it seems to me that the v1 uuids clj-uuid > generate are not exactly equivalent or comparable to the uuids generated by > java.util/randomUUID? It appears that V1 uuids are time (and MAC) based > and don't use a cryptographic random number generator, so the use cases are > different and the speed difference seems like more of a trade off. > > If I'm completely off base then please just say so. > > Thanks for the good work. Even with the above limitations I can see myself > using the faster version in the future. > > Lucas > > On 2 Mar 2015, at 14:52, Jacob Strength <mypci...@gmail.com> wrote: > > That is pretty amazing, I'll have to remember this library next time I > need to use UUID's. > Also I think you meant 450% faster. > > On Sunday, March 1, 2015 at 5:35:16 PM UTC-7, danl...@gmail.com wrote: >> >> Ok, for anyone following my adventures optimizing clj-uuid, I've gotten >> another substantial win. >> Check it out: http://danlentz.github.io/clj-uuid >> >> #'uuid/v1: 443 nanoseconds >> #'java.util.UUID/randomUUID: 2012 nanoseconds >> >> Also, the test suite has much greater coverage with individual tests for >> each v1, v,3, v4, v5 uuid version. >> And, finally, there more interesting notes about some of the esoteric >> details of the node-id representation >> and the way it is calculated to disambiguate it from any legal 802 MAC >> hardware address. And more.... ;) >> >> >> ====================================================================== >> >> user> (criterium/bench (uuid/v1)) >> >> Evaluation count: 139356300 in 60 samples of 2322605 calls. >> Execution time mean: 443.707611 ns >> >> >> user> (criterium/bench (java.util.UUID/randomUUID)) >> >> Evaluation count : 30850980 in 60 samples of 514183 calls. >> Execution time mean : 2.012861 µs >> >> >> -- > You received this message because you are subscribed to the Google > Groups "Clojure" group. > To post to this group, send email to clojure@googlegroups.com > Note that posts from new members are moderated - please be patient with > your first post. > To unsubscribe from this group, send email to > clojure+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/clojure?hl=en > --- > You received this message because you are subscribed to the Google Groups > "Clojure" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to clojure+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > > -- > You received this message because you are subscribed to the Google > Groups "Clojure" group. > To post to this group, send email to clojure@googlegroups.com > Note that posts from new members are moderated - please be patient with > your first post. > To unsubscribe from this group, send email to > clojure+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/clojure?hl=en > --- > You received this message because you are subscribed to the Google Groups > "Clojure" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to clojure+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
