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
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).
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
