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From Mike Carey <dtab...@gmail.com>
Subject Re: Adapting TimSort into AsterixDB/Hyracks
Date Sat, 28 Oct 2017 17:58:35 GMT
How is it on cache-friendliness?


On 10/27/17 11:38 PM, abdullah alamoudi wrote:
> While I have no answer to the question of legality, this sounds great.
>
> ~Abdullah.
>
>> On Oct 27, 2017, at 9:20 PM, Chen Luo <cluo8@uci.edu> wrote:
>>
>> Hi devs,
>>
>> I have adapted the TimSort algorithm used in JDK (java.util.TimSort) into
>> Hyracks, which gives 10-20% performance improvements on random data. It
>> will be more useful if the input data is partially sorted, e.g., primary
>> keys fetched from secondary index scan, which I haven't got time to
>> experiment with.
>>
>> *Before going any further, is it legal to adapt some algorithm
>> implementation from JDK into our codebase? *I saw the JDK implementation
>> itself is adopted from
>> http://svn.python.org/projects/python/trunk/Objects/listsort.txt as well.
>>
>> Best regards,
>> Chen Luo


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