You could give core.rrb-vector[1]. From the docs:
The main API entry points are clojure.core.rrb-vector/catvec,
performing vector concatenation, and clojure.core.rrb-vector/subvec, which
produces a new vector containing the appropriate subrange of the input
vector (in contrast to clojure.core/subvec, which returns a view on the
input vector).
[1] https://github.com/clojure/core.rrb-vector
On Saturday, March 29, 2014 8:42:25 PM UTC+2, Ryan Waters wrote:
>
> If you do a (count @mem) it reports the length of the atom's vector isn't
> growing without bounds. It seems counterintuitive that the parts of the
> old vector wouldn't get garbage collected because the atom no longer points
> to them. But I guess I need to rtfd.
>
> Thank you.
>
>
> On Sat, Mar 29, 2014 at 10:07 AM, Aaron Cohen
> <aa...@assonance.org<javascript:>
> > wrote:
>
>>
>>
>> On Sat, Mar 29, 2014 at 10:09 AM, Ryan Waters
>> <ryan....@gmail.com<javascript:>
>> > wrote:
>>
>>> I have some code that blows up the heap and I'm not sure why. I've
>>> reduced it down to the following.
>>>
>>> I've tried to make sure the atom doesn't have boundless growth and I
>>> didn't think 'while' hangs on to the head of sequences so I'm embarrassed
>>> to say I'm stumped.
>>>
>>>
>>> (defn leaks-memory
>>> []
>>> (let [mem (atom [])
>>> chunksize 1000
>>> threshold 2000]
>>> (while true
>>> (swap! mem conj (rand-int 100))
>>>
>>> ; every 'chunksize' item past 'threshold'
>>> (when (and (= 0 (mod (count @mem) chunksize))
>>> (> (count @mem) threshold))
>>> (swap! mem subvec chunksize)))))
>>>
>>> (doc subvec)
>>
>> Returns a persistent vector of the items in vector from
>> start (inclusive) to end (exclusive). If end is not supplied,
>> defaults to (count vector). This operation is O(1) and very fast, as
>> the resulting vector shares structure with the original and no
>> trimming is done.
>>
>> subvec is fast, but it's not saving you any memory.
>>
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