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← Concurrency is hard not because human brains cannot handle it but because nobody gets enough practice at it.
17 connected korrents · 18 moments on record from 2 Jan 2018 to 20 Aug 2026.
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mathematics
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coding agents
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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: Concurrency is hard not because human brains cannot handle it but because nobody gets enough practice at it. Concurrency is hard not because human brains cannot handle it but because nobody gets enough practice at it. Last stated a month ago
29 Jul 2026
HW
Hillel Wayne — holds since 2026-07-29 — tap for who they are
Same subject: Concurrency should stop being the programmer's problem and become the language designer's: it is better to impose vast pain on a few people than on a million. — tap to centre the map on it Concurrency should stop being the programmer's problem and become the language designer's: it is better to impose vast pain on a few people than on a million. Last stated a year ago
30 Apr 2025
TS
Tim Sweeney — holds since 2025-04-30 — tap for who they are
Same subject: Locking is too hard for programmers to get right over and over again, so the language runtime should do that part. — tap to centre the map on it Locking is too hard for programmers to get right over and over again, so the language runtime should do that part. Last stated 9 years ago
by 2 Jan 2018
RH
Rich Hickey — holds since 2018-01-02 — 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: What AI still cannot do in mathematics is build cumulatively on partial progress; it is trial, error and brute force rather than an idea improving through use. — tap to centre the map on it What AI still cannot do in mathematics is build cumulatively on partial progress; it is trial, error and brute force rather than an idea improving through use. Last stated 6 months ago
20 Mar 2026
TT
Terence Tao — holds since 2026-03-20 — 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: What trips up newcomers to Rust is not the code but the shape of their data. — tap to centre the map on it What trips up newcomers to Rust is not the code but the shape of their data. Last stated 4 months ago
20 May 2026
AR
Alice Ryhl — holds since 2026-05-20 — tap for who they are
Same subject: Very capable AI will be harder to align than current systems, because the loop of spotting a bad behaviour and patching the training that caused it breaks down. — tap to centre the map on it Very capable AI will be harder to align than current systems, because the loop of spotting a bad behaviour and patching the training that caused it breaks down. Last stated 4 weeks ago
11 Aug 2026
RG
Ryan Greenblatt — holds since 2026-08-11 — tap for who they are
Same subject: The human bottleneck is a safety property: remove it and small, individually harmless coding errors compound at a rate nobody feels until it is too late. — tap to centre the map on it The human bottleneck is a safety property: remove it and small, individually harmless coding errors compound at a rate nobody feels until it is too late. Last stated 5 months ago
25 Mar 2026
MZ
Mario Zechner — holds since 2026-03-25 — tap for who they are
Same subject: A blank chat box is lazy: it violates the first rule of a good user experience, that it is obvious what you can do. — tap to centre the map on it A blank chat box is lazy: it violates the first rule of a good user experience, that it is obvious what you can do. Last stated a year ago
12 May 2025
JZ
Julie Zhuo — holds since 2025-05-12 — tap for who they are
Same subject: A company deserves everyone in it, the chief executive included, to spend as much time as possible in their zone of genius — which is an org design problem. — tap to centre the map on it A company deserves everyone in it, the chief executive included, to spend as much time as possible in their zone of genius — which is an org design problem. Last stated a year ago
23 Mar 2025
RV
Rahul Vohra — holds since 2025-03-23 — tap for who they are
Same subject: A computer meant for anyone has to be understandable without a manual, and it has to be friendly. — tap to centre the map on it A computer meant for anyone has to be understandable without a manual, and it has to be friendly. Last stated 3 weeks ago
14 Aug 2026
SK
Susan Kare — holds since 2026-08-14 — tap for who they are
Same subject: A plain text file and a basic editor are everything anyone needs in order to think and write well; the extra tools add nothing. — tap to centre the map on it A plain text file and a basic editor are everything anyone needs in order to think and write well; the extra tools add nothing. Last stated 5 years ago
2 Mar 2022
DS
Derek Sivers — holds since 2022-03-02 — tap for who they are
Same subject: Building a command-line interface is almost always a good idea; building a terminal UI almost never is — tap to centre the map on it Building a command-line interface is almost always a good idea; building a terminal UI almost never is Last stated 3 weeks ago
20 Aug 2026
TP
Thomas Ptacek — holds since 2026-08-20 — tap for who they are
Same subject: Developer tools are consumer products, and the reason there are gaps to win is that programmers are horrible at consumer products and do not know it. — tap to centre the map on it Developer tools are consumer products, and the reason there are gaps to win is that programmers are horrible at consumer products and do not know it. Last stated 3 months ago
27 May 2026
DR
Dax Raad — holds since 2026-05-27 — tap for who they are
Same subject: After a decade of Swiss minimalism, design is about to swing back to something far more expressive. — tap to centre the map on it After a decade of Swiss minimalism, design is about to swing back to something far more expressive. Last stated 11 months ago
16 Oct 2025
DF
Dylan Field — holds since 2025-10-16 — 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: Better design does not mean more design: the most obvious designs are often invisible. — tap to centre the map on it Better design does not mean more design: the most obvious designs are often invisible. Last stated 3 years ago
16 Nov 2023
JZ
Julie Zhuo — holds since 2023-11-16 — tap for who they are
At the centre
Concurrency is hard not because human brains cannot handle it but because nobody gets enough practice at it.
Holds HW Hillel WayneRead this korrent →
Concurrency should stop being the programmer's problem and become the language designer's: it is better to impose vast pain on a few people than on a million.
Holds TS Tim Sweeney
Locking is too hard for programmers to get right over and over again, so the language runtime should do that part.
Holds RH Rich Hickey
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
What AI still cannot do in mathematics is build cumulatively on partial progress; it is trial, error and brute force rather than an idea improving through use.
Holds TT Terence Tao
You cannot really understand the code you write unless you are also the one operating it.
Holds CM Charity Majors
What trips up newcomers to Rust is not the code but the shape of their data.
Holds AR Alice Ryhl
Very capable AI will be harder to align than current systems, because the loop of spotting a bad behaviour and patching the training that caused it breaks down.
Holds RG Ryan Greenblatt
The human bottleneck is a safety property: remove it and small, individually harmless coding errors compound at a rate nobody feels until it is too late.
Holds
A blank chat box is lazy: it violates the first rule of a good user experience, that it is obvious what you can do.
Holds JZ Julie Zhuo
A company deserves everyone in it, the chief executive included, to spend as much time as possible in their zone of genius — which is an org design problem.
Holds RV Rahul Vohra
A computer meant for anyone has to be understandable without a manual, and it has to be friendly.
Holds SK Susan Kare
A plain text file and a basic editor are everything anyone needs in order to think and write well; the extra tools add nothing.
Holds
Building a command-line interface is almost always a good idea; building a terminal UI almost never is
Holds
Developer tools are consumer products, and the reason there are gaps to win is that programmers are horrible at consumer products and do not know it.
Holds
After a decade of Swiss minimalism, design is about to swing back to something far more expressive.
Holds DF Dylan Field
AI acceleration threatens 'less software': without the constraint of scarce hours, even 37signals will likely build too much.
Holds
Better design does not mean more design: the most obvious designs are often invisible.
Holds JZ Julie Zhuo