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← Understanding how a modern CPU executes code is a few months of work,…
17 connected korrents · 12 moments on record from 15 Oct 2019 to 3 Sept 2026.
Everything filed under software performance
software performance
Everything filed under JavaScript
JavaScript
Everything filed under compilers
compilers
Everything filed under developer tools
developer tools
Everything filed under simplicity
simplicity Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Read this korrent: Understanding how a modern CPU executes code is a few months of work, not a four-year degree, and it should be ordinary equipment for a software engineer. Understanding how a modern CPU executes code is a few months of work, not a four-year degree, and it should be ordinary equipment for a software engineer. Last stated 2 weeks ago
26 Aug 2026
CM
Casey Muratori — holds since 2026-08-26 — tap for who they are
Same subject: Source code in any language tells you nothing about what the CPU is actually asked to do; only the compiler's assembly output does, and reading it is a skill every serious programmer should have. — tap to centre the map on it Source code in any language tells you nothing about what the CPU is actually asked to do; only the compiler's assembly output does, and reading it is a skill every serious programmer should have. Last stated 2 weeks ago
26 Aug 2026
CM
Casey Muratori — holds since 2026-08-26 — tap for who they are
Same subject: You can teach somebody to be a really good AI developer in a few months, but you cannot teach them a computer science degree in three — so hire for the fundamentals. — tap to centre the map on it You can teach somebody to be a really good AI developer in a few months, but you cannot teach them a computer science degree in three — so hire for the fundamentals. Last stated 2 months ago
15 Jul 2026
DH
Dex Horthy — holds since 2026-07-15 — tap for who they are
Same subject: Getting five years of AI progress out of one year takes roughly eight years of algorithmic progress, because the compute you would have had must be made up too. — tap to centre the map on it Getting five years of AI progress out of one year takes roughly eight years of algorithmic progress, because the compute you would have had must be made up too. Last stated 4 weeks ago
11 Aug 2026
RG
Ryan Greenblatt — holds since 2026-08-11 — tap for who they are
Same subject: Deep compiler knowledge is still interesting, but it is no longer useful to a working engineer in any meaningful sense. — tap to centre the map on it Deep compiler knowledge is still interesting, but it is no longer useful to a working engineer in any meaningful sense. Last stated 6 months ago
11 Mar 2026
SY
Steve Yegge — holds since 2026-03-11 — tap for who they are
Same subject: Saying that coding will be automated away first betrays a misunderstanding of software engineering, because coding is only a small part of the work. — tap to centre the map on it Saying that coding will be automated away first betrays a misunderstanding of software engineering, because coding is only a small part of the work. Last stated 2 months ago
1 Jul 2026
KB
Kent Beck — holds since 2026-07-01 — tap for who they are
Same subject: A year from now every coding model on the market will still take a bad instruction at face value and go fix the listed issues, where a human senior engineer would insist on a rewrite. — tap to centre the map on it A year from now every coding model on the market will still take a bad instruction at face value and go fix the listed issues, where a human senior engineer would insist on a rewrite. Last stated 3 months ago
24 May 2026
DS
Dan Shipper — holds since 2026-05-24 — tap for who they are
Same subject: Letting non-programmers build their own unmaintainable software is still a large step forward, because the alternative was a thousand-page requirements document and an eight-year wait. — tap to centre the map on it Letting non-programmers build their own unmaintainable software is still a large step forward, because the alternative was a thousand-page requirements document and an eight-year wait. Last stated 2 months ago
1 Jul 2026
KB
Kent Beck — holds since 2026-07-01 — tap for who they are
Same subject: For an experienced programmer the bottleneck is usually not thinking but typing, getting what is already in your head into the editor fast enough. — tap to centre the map on it For an experienced programmer the bottleneck is usually not thinking but typing, getting what is already in your head into the editor fast enough. Last stated a year ago
22 Mar 2025
TH
ThePrimeagen — holds since 2025-03-22 — tap for who they are
Same subject: "Is the page loaded?" was never a real question, and web performance only became measurable once it was broken into the distinct moments a user actually notices. — tap to centre the map on it "Is the page loaded?" was never a real question, and web performance only became measurable once it was broken into the distinct moments a user actually notices. Last stated 3 weeks ago
19 Aug 2026
AO
Addy Osmani — holds since 2026-08-19 — tap for who they are
Same subject: "Optimize it later" would be safe advice only if every engineer already knew how to avoid the architectural mistakes that no later optimization can remove. — tap to centre the map on it "Optimize it later" would be safe advice only if every engineer already knew how to avoid the architectural mistakes that no later optimization can remove. Last stated 2 weeks ago
26 Aug 2026
CM
Casey Muratori — holds since 2026-08-26 — tap for who they are
Same subject: A 300-millisecond response budget is not an achievement but an admission: 300 milliseconds is an eternity in computing, and a product pitching it shows how far the bar has fallen. — tap to centre the map on it A 300-millisecond response budget is not an achievement but an admission: 300 milliseconds is an eternity in computing, and a product pitching it shows how far the bar has fallen. Last stated 2 weeks ago
26 Aug 2026
CM
Casey Muratori — holds since 2026-08-26 — tap for who they are
Same subject: Code and files generated by tools are pollution: hand-writing them is worth the effort because the bloat slows everything down for everyone. — tap to centre the map on it Code and files generated by tools are pollution: hand-writing them is worth the effort because the bloat slows everything down for everyone. Last stated 7 years ago
15 Oct 2019
DS
Derek Sivers — holds since 2019-10-15 — tap for who they are
Same subject: Generators emit thousands of lines where ten would do, and that waste is why people think their phone is slow. — tap to centre the map on it Generators emit thousands of lines where ten would do, and that waste is why people think their phone is slow. Last stated 7 years ago
15 Oct 2019
DS
Derek Sivers — holds since 2019-10-15 — tap for who they are
Same subject: AI acceleration threatens 'less software': without the constraint of scarce hours, even 37signals will likely build too much. — tap to centre the map on it AI acceleration threatens 'less software': without the constraint of scarce hours, even 37signals will likely build too much. Last stated a month ago
26 Jul 2026
DH
David Heinemeier Hansson — holds since 2026-07-26 — tap for who they are
Same subject: Optimizing JavaScript chunking strategy can produce significant efficiency gains at internet scale — tap to centre the map on it Optimizing JavaScript chunking strategy can produce significant efficiency gains at internet scale Last stated 4 days ago
3 Sept 2026
GR
Guillermo Rauch — holds since 2026-09-03 — tap for who they are
Same subject: A proprietary language licensed from Microsoft had zero chance in the JavaScript ecosystem: TypeScript had to be open source or nobody would come. — tap to centre the map on it A proprietary language licensed from Microsoft had zero chance in the JavaScript ecosystem: TypeScript had to be open source or nobody would come. Last stated 4 months ago
13 May 2026
AH
Anders Hejlsberg — holds since 2026-05-13 — tap for who they are
Same subject: Because its types are erased before the program runs, TypeScript can afford not to be sound: checking 99% beats the 0% JavaScript checked, and buys features a sound language cannot offer. — tap to centre the map on it Because its types are erased before the program runs, TypeScript can afford not to be sound: checking 99% beats the 0% JavaScript checked, and buys features a sound language cannot offer. Last stated 4 months ago
13 May 2026
AH
Anders Hejlsberg — holds since 2026-05-13 — tap for who they are
At the centre
Understanding how a modern CPU executes code is a few months of work, not a four-year degree, and it should be ordinary equipment for a software engineer.
Holds CM Casey MuratoriRead this korrent →
Source code in any language tells you nothing about what the CPU is actually asked to do; only the compiler's assembly output does, and reading it is a skill every serious programmer should have.
Holds CM Casey Muratori
You can teach somebody to be a really good AI developer in a few months, but you cannot teach them a computer science degree in three — so hire for the fundamentals.
Holds DH Dex Horthy
Getting five years of AI progress out of one year takes roughly eight years of algorithmic progress, because the compute you would have had must be made up too.
Holds RG Ryan Greenblatt
Deep compiler knowledge is still interesting, but it is no longer useful to a working engineer in any meaningful sense.
Holds SY Steve Yegge
Saying that coding will be automated away first betrays a misunderstanding of software engineering, because coding is only a small part of the work.
Holds KB Kent Beck
A year from now every coding model on the market will still take a bad instruction at face value and go fix the listed issues, where a human senior engineer would insist on a rewrite.
Holds DS Dan Shipper
Letting non-programmers build their own unmaintainable software is still a large step forward, because the alternative was a thousand-page requirements document and an eight-year wait.
Holds KB Kent Beck
For an experienced programmer the bottleneck is usually not thinking but typing, getting what is already in your head into the editor fast enough.
Holds TH ThePrimeagen
"Is the page loaded?" was never a real question, and web performance only became measurable once it was broken into the distinct moments a user actually notices.
Holds AO Addy Osmani
"Optimize it later" would be safe advice only if every engineer already knew how to avoid the architectural mistakes that no later optimization can remove.
Holds CM Casey Muratori
A 300-millisecond response budget is not an achievement but an admission: 300 milliseconds is an eternity in computing, and a product pitching it shows how far the bar has fallen.
Holds CM Casey Muratori
Code and files generated by tools are pollution: hand-writing them is worth the effort because the bloat slows everything down for everyone.
Holds
Generators emit thousands of lines where ten would do, and that waste is why people think their phone is slow.
Holds
AI acceleration threatens 'less software': without the constraint of scarce hours, even 37signals will likely build too much.
Holds
Optimizing JavaScript chunking strategy can produce significant efficiency gains at internet scale
Holds
A proprietary language licensed from Microsoft had zero chance in the JavaScript ecosystem: TypeScript had to be open source or nobody would come.
Holds AH Anders Hejlsberg
Because its types are erased before the program runs, TypeScript can afford not to be sound: checking 99% beats the 0% JavaScript checked, and buys features a sound language cannot offer.
Holds AH Anders Hejlsberg