# Building a Fast, Memory-Efficient Hash Table in Java (by borrowing the best ideas)

**URL:** <https://forum.devtalk.com/t/building-a-fast-memory-efficient-hash-table-in-java-by-borrowing-the-best-ideas/226574>\
**Category:** Backend In The News\
**Tags:** via-news-bot, java, hash, in-the-news\
**Created:** [16 December 2025 13:49 UTC](https://forum.devtalk.com/t/building-a-fast-memory-efficient-hash-table-in-java-by-borrowing-the-best-ideas/226574 "2025-12-16T13:49:54Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![CommunityNews](https://forum.devtalk.com/user_avatar/forum.devtalk.com/communitynews/32/1113_2.png) [@CommunityNews](https://forum.devtalk.com/u/CommunityNews)\
**Post date:** [16 December 2025 13:49 UTC](https://forum.devtalk.com/t/building-a-fast-memory-efficient-hash-table-in-java-by-borrowing-the-best-ideas/226574/1 "2025-12-16T13:49:54Z")

</div>

> One day, I ran into SwissTable—the kind of design that makes you squint, grin, and immediately regret every naive linear-probing table you’ve ever shipped.  
> This post is the story of how I tried to bring that same “why is this so fast?” feeling into Java. It’s part deep dive, part engineering diary, and part cautionary tale about performance work.
> 
> 1. The SwissTable project, explained the way it feels when you first understand it SwissTable is an open-addressing hash table design that came out of Google’s work and was famously presented as a new C++ hash table approach (and later shipped in Abseil).

Read in full here:

> **[Building a Fast, Memory-Efficient Hash Table in Java (by borrowing the best...](https://bluuewhale.github.io/posts/building-a-fast-and-memory-efficient-hash-table-in-java-by-borrowing-the-best-ideas/)**
>
> One day, I ran into SwissTable—the kind of design that makes you squint, grin, and immediately regret every naive linear-probing table you’ve ever shipped.
> This post is the story of how I tried to bring that same “why is this so fast?” feeling into...