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← To actually understand a piece of technology, rebuild it from scratch rather than read about it.
17 connected korrents · 12 moments on record from 15 Oct 2019 to 26 Aug 2026.
Everything filed under software performance
software performance
Everything filed under compilers
compilers
Everything filed under code generation
code generation 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: To actually understand a piece of technology, rebuild it from scratch rather than read about it. To actually understand a piece of technology, rebuild it from scratch rather than read about it. Last stated a year ago
22 Mar 2025
TH
ThePrimeagen — holds since 2025-03-22 — tap for who they are
Same subject: You only really know something once you have built it — blog posts and slides leave gaps that building the thing does not. — tap to centre the map on it You only really know something once you have built it — blog posts and slides leave gaps that building the thing does not. Last stated 11 months ago
17 Oct 2025
AK
Andrej Karpathy — holds since 2025-10-17 — tap for who they are
Same subject: Programmers should be reading research papers and crawling their references, and the fact that almost none of them do is a bigger gap than any book recommendation could close. — tap to centre the map on it Programmers should be reading research papers and crawling their references, and the fact that almost none of them do is a bigger gap than any book recommendation could close. Last stated 2 weeks ago
26 Aug 2026
CM
Casey Muratori — holds since 2026-08-26 — tap for who they are
Same subject: You learn a programming language by building something in it, not by reading about it. — tap to centre the map on it You learn a programming language by building something in it, not by reading about it. Last stated 4 months ago
20 May 2026
AR
Alice Ryhl — holds since 2026-05-20 — tap for who they are
Same subject: Veterans of the 1990s free software movement do not understand the world today’s maintainers work in, and should listen before proposing fixes for it. — tap to centre the map on it Veterans of the 1990s free software movement do not understand the world today’s maintainers work in, and should listen before proposing fixes for it. Last stated 2 years ago
1 Apr 2024
TD
Thomas Depierre — holds since 2024-04-01 — tap for who they are
Same subject: Computing is an onion, and the more layers of it you can peel back and understand, the better you can build for the constrained machines real people are using. — tap to centre the map on it Computing is an onion, and the more layers of it you can peel back and understand, the better you can build for the constrained machines real people are using. Last stated 3 weeks ago
19 Aug 2026
AO
Addy Osmani — holds since 2026-08-19 — tap for who they are
Same subject: The internet is already past peak truth, and picking out training data worth learning from will only get harder. — tap to centre the map on it The internet is already past peak truth, and picking out training data worth learning from will only get harder. Last stated 4 months ago
13 May 2026
AH
Anders Hejlsberg — holds since 2026-05-13 — tap for who they are
Same subject: What is worth building is found by starting from a long-standing pain and asking which new technology has just made it solvable. — tap to centre the map on it What is worth building is found by starting from a long-standing pain and asking which new technology has just made it solvable. Last stated 3 months ago
7 Jun 2026
TF
Tony Fadell — holds since 2026-06-07 — tap for who they are
Same subject: You cannot really understand the code you write unless you are also the one operating it. — tap to centre the map on it You cannot really understand the code you write unless you are also the one operating it. Last stated 4 weeks ago
12 Aug 2026
CM
Charity Majors — holds since 2026-08-12 — 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: 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: AI-written code makes formal proof necessary, because human review of all that generated code becomes the bottleneck. — tap to centre the map on it AI-written code makes formal proof necessary, because human review of all that generated code becomes the bottleneck. Last stated 5 months ago
22 Apr 2026
MK
Martin Kleppmann — holds since 2026-04-22 — 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: A compiler that also serves an IDE has to be lazy and deferred throughout — a different way of building compilers from the one the textbooks teach. — tap to centre the map on it A compiler that also serves an IDE has to be lazy and deferred throughout — a different way of building compilers from the one the textbooks teach. Last stated 4 months ago
13 May 2026
AH
Anders Hejlsberg — holds since 2026-05-13 — tap for who they are
Same subject: A compiler that names every place a change breaks turns refactoring into fixing errors until the compiler stops shouting. — tap to centre the map on it A compiler that names every place a change breaks turns refactoring into fixing errors until the compiler stops shouting. Last stated 4 months ago
20 May 2026
AR
Alice Ryhl — holds since 2026-05-20 — tap for who they are
Same subject: A programming language is not a compiler but an experience: editing, running, debugging and the runtime library all have to fit together as one cycle. — tap to centre the map on it A programming language is not a compiler but an experience: editing, running, debugging and the runtime library all have to fit together as one cycle. Last stated 4 months ago
13 May 2026
AH
Anders Hejlsberg — holds since 2026-05-13 — tap for who they are
At the centre
To actually understand a piece of technology, rebuild it from scratch rather than read about it.
Holds TH ThePrimeagenRead this korrent →
You only really know something once you have built it — blog posts and slides leave gaps that building the thing does not.
Holds
Programmers should be reading research papers and crawling their references, and the fact that almost none of them do is a bigger gap than any book recommendation could close.
Holds CM Casey Muratori
You learn a programming language by building something in it, not by reading about it.
Holds AR Alice Ryhl
Veterans of the 1990s free software movement do not understand the world today’s maintainers work in, and should listen before proposing fixes for it.
Holds TD Thomas Depierre
Computing is an onion, and the more layers of it you can peel back and understand, the better you can build for the constrained machines real people are using.
Holds AO Addy Osmani
The internet is already past peak truth, and picking out training data worth learning from will only get harder.
Holds AH Anders Hejlsberg
What is worth building is found by starting from a long-standing pain and asking which new technology has just made it solvable.
Holds TF Tony Fadell
You cannot really understand the code you write unless you are also the one operating it.
Holds CM Charity Majors
"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
AI acceleration threatens 'less software': without the constraint of scarce hours, even 37signals will likely build too much.
Holds
AI-written code makes formal proof necessary, because human review of all that generated code becomes the bottleneck.
Holds MK Martin Kleppmann
Code and files generated by tools are pollution: hand-writing them is worth the effort because the bloat slows everything down for everyone.
Holds
A compiler that also serves an IDE has to be lazy and deferred throughout — a different way of building compilers from the one the textbooks teach.
Holds AH Anders Hejlsberg
A compiler that names every place a change breaks turns refactoring into fixing errors until the compiler stops shouting.
Holds AR Alice Ryhl
A programming language is not a compiler but an experience: editing, running, debugging and the runtime library all have to fit together as one cycle.
Holds AH Anders Hejlsberg