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Floating Point Hashing: Why you shouldn't do it, and why I did it one time anyway

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RustNL
RustWeek 30:14 728 views

You may have heard that floating point numbers are “numerically unstable” and “shouldn’t be hashed”, but why? Today we’ll learn all the reasons why this is a TERRIBLE idea, and then we’ll break all the rules and do it anyway! What are they going to do, put me in floating point jail? For an addenda post, a collection of bonus content and elaborations on the talk, see: https://sixfold-origami.com/articles/floating-point-hashing-addenda You can find Rose on: GitHub: https://github.com/sixfold-ori

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Other talks by Rose Peck

When uom isn't enough: Handling units of measurement in production CAD

RustNL
RustWeek 21:41 702 views

When uom isn't enough: Handling units of measurement in production CAD by Rose Peck. As it turns out, handling units of measurement in the real world is actually really hard! uom is an awesome library that provides strong, static types to represent different measurement units. It's tempting to just slap uom types on everything and call it a day, but when making production CAD software, this isn't enough. Today we'll be talking about all of the surprising challenges with real world unit handling, and investigating some solutions and their tradeoffs. You can find a follow-up blog post by rose here: https://sixfold-origami.com/articles/unit-handling-addenda About Rose Peck (she/they): Extremely average programmer, vacillating between “it’s so over” and “we’re so back”. I write Rust for a living at the Foresight Spatial Labs, making CAD software with the Bevy engine. I love writing, making games, and folding origami! I’m also a grandmaster Tetris player. - git: https://github.com/sixfold-origami/ - website: https://sixfold-origami.com/ This talk was given at RustWeek 2026 as part of the Main track on Tuesday 19 May. You can find a playlist of all talks in this track at https://www.youtube.com/playlist?list=PL8Q1w7Ff68DCvQXADosMcF0aMvLhGXU4S, and a playlist of all RustWeek 2026 talks at https://www.youtube.com/playlist?list=PL8Q1w7Ff68DBpmF38rcIAf8Z9Gj2TnlgM For information about RustWeek 2027, go to https://2027.rustweek.org. We hope to see you there!