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https://issues.apache.org/jira/browse/MAHOUT-253?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dawid Weiss updated MAHOUT-253:
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Attachment: hppc-1.0-dev.zip
> 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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