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Floating-Point Printing and Parsing Can Be Simple And Fast
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19 September
Economics professor at the University of California, Berkeley and a former Deputy Assistant Secretary of the US Treasury. Author of Slouching Towards Utopia and writer of the Grasping Reality newsletter.
A tinkerer recovered Claude’s true usage limits from a suspiciously precise decimal like 0.16327272727272726. This is very useful, because Anthropic really does not want to give me any useful information about the quantities of tokens my $20/month Claude Pro subscription is offering me before I run up against a limit and have to either switch out the models or pay API pay-as-you-go pricing: **CROSSPOST: SHELLAC: Suspiciously Precise Floats, or, How I Got Claude’s Real Limits** Two... 1/ Anthropic Related
18 September
Computer science professor who works on fast data processing; co-author of the simdjson parser and a weekly blogger about software performance since 2004.
Faster JSON parsing with SVE2 on ARM processors ARM processors, like those in your phone, have instructions capable of processing several elements at once (SIMD). These instructions are called NEON. But many newer processors have a different SIMD extension called SVE…
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Philosophy professor at UC Berkeley and creator of pandoc, the universal document converter, and of the CommonMark markdown specification.
15 September
Computer science professor who works on fast data processing; co-author of the simdjson parser and a weekly blogger about software performance since 2004.
A new fast_float release... fast_float is a super fast number parser in C++ (used by GCC, MySQL, your browser...). The latest release adds support for parsing numbers following the JavaScript standard, so things like 05.1 can be accepted (!!!). JavaScript Related
If anyone wants a nice side project... The fast number parsing fast_float (part of GCC, and other important systems like MySQL) is not always exact when dealing with 16-bit float parsing (specifically float16_t). That is, some number strings can lie in between two numbers and the rounding is wrong. In fact, nobody has done a proper analysis of the implementation to insure that it is correct. Yeah. I could ask my AI, but it is still work, especially because I do not trust anyone, not even an AI, to get it correct the first time around. Contributions invited. github.com
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25 August
Music critic and historian; author of The History of Jazz and Music: A Subversive History. Writes the newsletter The Honest Broker on music and culture.
22 August
Computer science professor who works on fast data processing; co-author of the simdjson parser and a weekly blogger about software performance since 2004.
19 August
Computer science professor who works on fast data processing; co-author of the simdjson parser and a weekly blogger about software performance since 2004.
Parsing IP addresses in C# at crazy speeds We are all familiar with IP addresses such as 192.168.0.1. They are typically written as four numbers in the range 0 to 255 inclusive, separated by dots. In C#, you can parse them with the standard library using IPAddre…
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31 July
Indian software engineer and co-founder of Skcript; builds web apps and writes at varunraj.in.
25 July
Programmer and writer; specified JSON, wrote JavaScript: The Good Parts, JSLint and How JavaScript Works.
29 April
Canadian full-stack web developer who makes JavaScript and CSS video courses and co-hosts the Syntax podcast.
27 February
Software engineer and a long-time technical lead of the Go programming language; author of plan9port and of the research.swtch.com essays.
19 January
Software engineer and a long-time technical lead of the Go programming language; author of plan9port and of the research.swtch.com essays.
Their words
Given the simplicity and speed of the algorithms in this post and the increasingly small deltas between successive algorithms, perhaps we are nearing an optimal solution.
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research.swtch.com
26 October 2025
Mathematical biologist; Senior Lecturer in the Department of Mathematical Sciences at the University of Bath and author of The Maths of Life and Death and How to Expect the Unexpected.
13 October 2025
Freelance research analyst and writer of the blog Aceso Under Glass, known for 'epistemic spot checks' of non-fiction claims.
energy
Their words
In general your body would rather use glycogen than fat, because glycogen loses almost no energy in the conversion from and to sugar and fat loses a lot.
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acesounderglass.com
12 March 2025
Writer and consultant on formal methods and software correctness; author of Practical TLA+ and Logic for Programmers.
7 September 2023
Mathematical biologist; Senior Lecturer in the Department of Mathematical Sciences at the University of Bath and author of The Maths of Life and Death and How to Expect the Unexpected.
7 September 2022
Biochemist at University College London; writes about the origin of life and the role of energy in evolution, in The Vital Question and Transformer.
Their words
So, how did they do that? You may as well say that a miracle happened. I don’t believe in soup. I think what we have in a vent is a continuous conversion, a continuous growth, a continuous reaction, a continuous converting a flow of molecules into more of yourself, you might say, even if it’s a small bit.
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youtube.com
30 August 2021
Front-end developer and writer on Svelte, Vue, CSS and WordPress; blogs at joshcollinsworth.com.
8 February 2017
Working on @ampcode. Writing registerspill.thorstenball.com. Once authored interpreterbook.com and compilerbook.com.
8 July 2013
Danish Mac developer; author of the TextMate text editor and founder of MacroMates.
13 August 2011
Software developer; created Firebug, helped create Firefox on the Netscape browser team, and built the original Facebook iPhone app.
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A korrent is a belief a person has stated in their own words: one
sentence stating the claim, backed by a quote and a source, kept at
korrents.com .
Under a name here, the quoted block is what they actually said.
The korrent beneath it is the claim those words support, in
korrents' wording — tap it to see the record, its source, and who
else holds it.
Nobody here wrote their own korrents. They are compiled from public
statements, and a person can change their mind, which is recorded too.
Got it
About the English under a post
Some people here publish in a language other than English. Where they
do, this site shows a machine translation beneath the post, in
this typeface — the site's own, not theirs.
The post itself is never changed, moved or hidden: what is set in the
serif above is exactly what the person published, and it is what to
quote them on. A translation can be wrong in ways that matter,
especially about tone.
Only the post's own words are translated. A quoted post, a linked
article and a belief on korrents.com
are left in their original language.
Got it