Beeg float library, a Rust port of Fabrice Bellard's libbf

serialx 18 points 12 comments July 05, 2026
github.com · View on Hacker News

Discussion Highlights (4 comments)

RossBencina

EDIT: I see that libbf implements faithful rounding of operations. Nice. TIL. See also: Jean-Michel Muller's books: "Handbook of Floating Point Arithmetic," and "Elementary Functions." https://www.sollya.org/

i2talics

"Dear HN, I pointed Claude at another existing codebase and told it to port it to Rust. I don't have anything new to add myself. Please lap this up."

lifthrasiir

Just in case, this is my library and I didn't post this to the HN, because I didn't think this is that HN-worthy. Ask me anything anyway. My main motivation to port libbf was to see if it is faster than usual libraries available in Rust, and yes, some operations are indeed faster than others, but it was tough to compare against Rug which uses MPFR under the hood. I did fully design the library API beforehand and explicitly directed the documentation, testing and benchmark tasks, but of course all the brilliance of the library comes from Fabrice Bellard and not me.

fcpk

uh... that title... don't search for what the hell a "Beeg" is. apparently this was just sloppy spelling for beef

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