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https://issues.apache.org/jira/browse/MAHOUT-253?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12914453#action_12914453
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Sean Owen commented on MAHOUT-253:
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Colt remains partially-undigested within this codebase. My only concern is that
a new mission to integrate HPPC will result in two partially-undigested
libraries, both already partly duplicating some core code.
Is this to replace Colt? if someone truly replaces all similar code and it all
works, I'm completely into it.
If the idea is just to put HPPC into Mahout to host it as an independent
module, I personally am not sure that is worth the effort.
> Proposal for high performance primitive collections.
> ----------------------------------------------------
>
> Key: MAHOUT-253
> URL: https://issues.apache.org/jira/browse/MAHOUT-253
> Project: Mahout
> Issue Type: New Feature
> Components: Utils
> Reporter: Dawid Weiss
> Assignee: Dawid Weiss
> Priority: Minor
> Attachments: hppc-1.0-dev.zip
>
>
> A proposal for template-driven collections library (lists, sets, maps,
> deques), with specializations for Java primitive types to save memory and
> increase performance. The "templates" are regular Java classes written with
> generics and certain "intrinsics", that is blocks replaceable by a
> regexp-preprocessor. This lets one write the code once, immediately test it
> (tests are also templates) and generate primitive versions from a single
> source.
> An additional interesting part is the benchmarking subsystem written on top
> of JUnit ;)
> There are major differences from the Java Collections API, most notably no
> interfaces and interface-compatible views over sub-collections or key/value
> sets. These classes also expose their internal implementation (buffers,
> addressing, etc.) so that the code can be optimized for a particular use case.
> These motivations are further discussed here, together with an API overview.
> http://www.carrot-search.com/download/hppc/index.html
> I am curious what you think about it. If folks like it, Carrot Search will
> donate the code to Mahout (or Apache Commons-?) and will maintain it (because
> we plan to use it in our internal projects anyway).
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