Stephan T. Lavavej “Floating-Point ＜charconv＞: Making Your Code 10x Faster With C++17's Final Boss”

CppCon · 40.6K views · 2019-10-11 · 1:00:17

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Overview

Stephan T. Lavavej's CppCon 2019 talk on implementing floating-point to_chars and from_chars in Microsoft's C++ STL. It covers the history of float-string conversion and the algorithms that make it much faster.

On Hacker News

HN calls it a surprisingly fun, approachable talk on a hard problem and cites it in floating-point threads.

Recommended by 3 HN people across 3 months · HN mentions 2020–2022

Topics

C, C++, Rust, Go & systems languages Software performance & optimization Algorithms & data structures

What people said

Forricide · 2022-09 · Strong recommendation
I really love this talk in particular: [VIDEO] (On charconv) But any of the ones I've seen from Stephan have been fantastic, I think, although I'm not actually sure if I've seen more. He seems to have a lot of talks on very specific subjects, which can be really fun. > Hyrum Wright is in the audience yelling interjections as a result of Hyrum's law This sounds absolutely hilarious, I'll have to take a look.
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ygra · 2020-10 · Recommendation
Stephan T Lavavej also had a surprisingly fun and approachable talk on that problem, talking about how charconv got implemented and improved in Microsoft's C++ standard library: [VIDEO]
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osolo · 2020-09 · Recommendation
For those interested in more information about performance was achieved, Stephan Lavavej gave a talk about this very subject during CppCon 2019 [1]. [1] [VIDEO]
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Sources

Video by CppCon, played through YouTube.

HN Library · Source license

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