It's pure ClojureScript. Hopefully a step towards CinC, yes. :-)

Sincerely,
Michał


On 20 April 2012 20:32, Brent Millare <brent.mill...@gmail.com> wrote:
> Quick question, so does this mean we have clojure's persistent data
> structures implemented in clojurescript or js? This would mean we are one
> more step closer to C-in-C right?
>
> On Friday, April 20, 2012 1:38:17 PM UTC-4, Michał Marczyk wrote:
>>
>> Since the latest PHM patch has now been merged to master (thanks,
>> David!), I wanted to take this opportunity to note that porting all
>> that Java code (including the transient support for PHM -- a working
>> version of which is available for testing in its own ticket [1] -- and
>> now the PersistentTreeMap [2]) has been completely smooth sailing.
>> Some additions have been made to the implementation to improve
>> performance while maintaining clarity of the code (here some excellent
>> suggestions from David were very helpful), but the initial
>> implementation already worked without them and client code could
>> absolutely replicate them (by providing the requisite compiler macros
>> in its own namespace). It's not that I expected insurmountable
>> difficulties, but experiencing just how complete ClojureScript already
>> is in the context of this sort of non-trivial data structure
>> implementation task has been amazing.
>>
>> For those interested in how PHM's performance compares to that of the
>> previously used ObjMap and HashMap copy-on-write implementations,
>> there are some jsPerf tests linked to from the ticket [3]. There's
>> also a TransientHM vs. PHM comparison linked to from [2].
>>
>> Sincerely,
>> Michał
>>
>>
>> [1] http://dev.clojure.org/jira/browse/CLJS-181
>> [2] http://dev.clojure.org/jira/browse/CLJS-187
>> [3] http://dev.clojure.org/jira/browse/CLJS-178
>
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