3 HN users recommended this talk3 months2020–2022score 3.5
Years with an HN recommendation, 2007–2026
HN calls it a surprisingly fun, approachable talk on a hard problem and cites it in floating-point threads.
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.
“Stephan T Lavavej also had a surprisingly fun and approachable talk on that problem” (HN, 2020)
I really love this talk in particular: [this 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.
For those interested in more information about performance was achieved, Stephan Lavavej gave a talk about this very subject during CppCon 2019 [1]. [1] [this video]
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: [this video]
Fun, approachable talk on charconv implementation in Microsoft's STL
Actually, there's even more recent research into doing this really efficiently, using an algorithm called Ryū. [e] [link] [-4] [link] [1.73] [this video]
I'm glad you liked my charconv talk! Here's a complete list of my recorded conference talks: BoostCon/C++Now 2012: Regex In C++11 And Boost: [link] GoingNative 2012: STL11: Magic && Secrets: [link] GoingNative 2013: Don't Help The Compiler: [link] GoingNative 2013: rand() Considered Harmful: [link] CppCon 2014: STL Features And Implementation Techniques: [link] CppCon 2015: functional: What's New, And Proper Usage: [link] CppCon 2016: tuple: What's New, And How It Works: [link] CppCon 2018: Class Template Argument Deduction for Everyone: [link] CppCon 2019: Floating-Point charconv: Making Your Code 10x Faster With C++17's Final Boss: [this video] CppCon 2020: C++20 STL Features: 1 Year of Development on GitHub: [link] Pure Virtual C++ 2022: MSVC C++20/23 Update: [link]
Speaker's own list of conference talks, includes this one
Video list and Hacker News comment labels from HackerTube (prompted by @karpathy), released under ODC-By 1.0, built on the open-index/hacker-news archive. Hacker News data is provided by Y Combinator; comments remain the work of their authors. Video titles, channel names and thumbnails belong to their creators and are shown via YouTube. HackerTube Watch is an unofficial edition. Data export of 2026-10-31.
Plays via YouTube's privacy-enhanced embed
5 Hacker News comments
From the HN archive; up to 20 kept per video, favoring different commenters. Recommendations first.
Citations, criticism and jokes
Read more