Relaxed Radix Balanced Trees (2024)

182 points by jasonjmcghee 2 days ago | 16 comments

I would love to add a good RRB implementation to the persistent benchmarks at [1] to get a state-of-the-art comparison between RRB and BST in a persistent context. Duration, of course, but also number of bytes copied etc.

https://rtheunissen.github.io/bst

p-hk 2 days ago | root | parent | next |

I can't vouch for them, but there are Clojure[1] and C[2] implementations you might consider.

[1] https://github.com/clojure/core.rrb-vector

[2] https://github.com/hyPiRion/c-rrb

prospero a day ago | root | parent |

Here’s one in Java: https://github.com/lacuna/bifurcan/blob/master/src/io/lacuna...

This guide is absolutely fantastic, thank you! You should post it if it hasn't been.

jasonjmcghee 2 days ago | root | parent |

It has, and a pretty good discussion: https://news.ycombinator.com/item?id=37130200

baruchthescribe 2 days ago | root | parent | prev |

Thanks for this resource!

bjoli 2 days ago | prev | next |

I always wanted a comparison to ropes. Every time I see ropes mentioned I always think "why not use RRB trees?". It seems like less housekeeping, but with all the benefits.

bruce343434 2 days ago | root | parent |

Let T[] denote "dynamic array of T": rope = string[] = char[][].

As I understand it, usually each line of text is in its own memory buffer.

neonsunset 2 days ago | prev | next |

If you like radix trees, you may also find this article interesting and useful: https://vincent.bernat.ch/en/blog/2017-ipv4-route-lookup-lin...

lbindreiter 2 days ago | prev |

What tool were those tree structure Illustrations created with? They look really nice!

p-hk 2 days ago | root | parent | next |

Thanks! I used draw.io and tweaked a number of the display properties to make it look more like Excalidraw.

anentropic a day ago | root | parent | next |

I love the styling of this blog post generally too - simple, attractive and pleasant to read - kudos

dlisboa 21 hours ago | root | parent | prev |

Did you do them by hand or use some algorithmic way to construct them?

Not the author, but looks similar to excalidraw.

this looks like draw.io with a custom font. edit: nope, i'm wrong, its excalidraw but the effect is almost identical in draw.io.

2 days ago | root | parent | prev |

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