What is the most efficient Java Collections library?

Posted by dehmann on Stack Overflow See other posts from Stack Overflow or by dehmann
Published on 2009-03-10T11:48:07Z Indexed on 2010/03/19 7:11 UTC
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java

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subjective

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polls

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library

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collections

What is the most efficient Java Collections library?

A few years ago, I did a lot of Java and had the impression back then that trove is the best (most efficient) Java Collections implementation. But when I read the answers to the question "Most useful free Java libraries?" I noticed that trove is hardly mentioned. So which Java Collections library is best now?

UPDATE: To clarify, I mostly want to know what library to use when I have to store millions of entries in a hash table etc. (need a small runtime and memory footprint).

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