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← Everyone on a team who makes architectural decisions must understand…
17 connected korrents · 10 moments on record from 1 Jun 2022 to 26 Aug 2026.
Everything filed under software performance
software performance
Everything filed under code generation
code generation
Everything filed under compilers
compilers
Everything filed under JavaScript
JavaScript
Everything filed under coding agents
coding agents
Everything filed under design
design 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: Everyone on a team who makes architectural decisions must understand performance, because a codebase that can be optimized later only ends up that way on purpose. Everyone on a team who makes architectural decisions must understand performance, because a codebase that can be optimized later only ends up that way on purpose. Last stated 2 weeks ago
26 Aug 2026
CM
Casey Muratori — holds since 2026-08-26 — tap for who they are
Same subject: Most organisations are bottlenecked on ideas, vision and taste rather than on implementation, so making code cheap does not make them productive. — tap to centre the map on it Most organisations are bottlenecked on ideas, vision and taste rather than on implementation, so making code cheap does not make them productive. Last stated 2 weeks ago
26 Aug 2026
DH
David Heinemeier Hansson — holds since 2026-08-26 — tap for who they are
Same subject: The evidence from the largest software companies says programmers should take performance more seriously than they do, not less. — tap to centre the map on it The evidence from the largest software companies says programmers should take performance more seriously than they do, not less. Last stated 3 years ago
26 Apr 2023
CM
Casey Muratori — holds since 2023-04-26 — 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: Hand-optimizing hot spots barely matters any more, because the libraries are already fast and CPUs are extremely good at running bad code quickly; what is left is architecture. — tap to centre the map on it Hand-optimizing hot spots barely matters any more, because the libraries are already fast and CPUs are extremely good at running bad code quickly; what is left is architecture. Last stated 2 weeks ago
26 Aug 2026
CM
Casey Muratori — holds since 2026-08-26 — tap for who they are
Same subject: The code today’s models and agents write is very hard to follow: you get better performance without knowing why, and no way to fix it when it breaks. — tap to centre the map on it The code today’s models and agents write is very hard to follow: you get better performance without knowing why, and no way to fix it when it breaks. Last stated 2 months ago
19 Jul 2026
ES
Elizabeth Stone — holds since 2026-07-19 — tap for who they are
Same subject: There is no trade-off between well-architected code and fast code: in practice, the code that is architected properly is also the code that runs quickly. — tap to centre the map on it There is no trade-off between well-architected code and fast code: in practice, the code that is architected properly is also the code that runs quickly. Last stated 2 weeks ago
26 Aug 2026
CM
Casey Muratori — holds since 2026-08-26 — tap for who they are
Same subject: An abstraction chosen wrongly at the start means a team can never make its software great, however good that team is. — tap to centre the map on it An abstraction chosen wrongly at the start means a team can never make its software great, however good that team is. Last stated 12 months ago
18 Sept 2025
TL
Tobias Lütke — holds since 2025-09-18 — tap for who they are
Same subject: Deep design expertise does not get squeezed out just because code and analysis got faster. — tap to centre the map on it Deep design expertise does not get squeezed out just because code and analysis got faster. Last stated 2 months ago
19 Jul 2026
ES
Elizabeth Stone — holds since 2026-07-19 — 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: Every time software has become easier to create, the world has created exponentially more of it, and this time will be no exception. — tap to centre the map on it Every time software has become easier to create, the world has created exponentially more of it, and this time will be no exception. Last stated 3 weeks ago
19 Aug 2026
AO
Addy Osmani — holds since 2026-08-19 — 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
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
Same subject: Fiscal multipliers vary across time and place but are generally nonzero, positive for spending, negative for taxes, and larger when monetary policy cannot offset them. — tap to centre the map on it Fiscal multipliers vary across time and place but are generally nonzero, positive for spending, negative for taxes, and larger when monetary policy cannot offset them. Last stated 4 years ago
1 Jun 2022
OB
Olivier Blanchard — holds since 2022-06-01 — tap for who they are
At the centre
Everyone on a team who makes architectural decisions must understand performance, because a codebase that can be optimized later only ends up that way on purpose.
Holds CM Casey MuratoriRead this korrent →
Most organisations are bottlenecked on ideas, vision and taste rather than on implementation, so making code cheap does not make them productive.
Holds
The evidence from the largest software companies says programmers should take performance more seriously than they do, not less.
Holds CM Casey Muratori
"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
Hand-optimizing hot spots barely matters any more, because the libraries are already fast and CPUs are extremely good at running bad code quickly; what is left is architecture.
Holds CM Casey Muratori
The code today’s models and agents write is very hard to follow: you get better performance without knowing why, and no way to fix it when it breaks.
Holds ES Elizabeth Stone
There is no trade-off between well-architected code and fast code: in practice, the code that is architected properly is also the code that runs quickly.
Holds CM Casey Muratori
An abstraction chosen wrongly at the start means a team can never make its software great, however good that team is.
Holds
Deep design expertise does not get squeezed out just because code and analysis got faster.
Holds ES Elizabeth Stone
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
Every time software has become easier to create, the world has created exponentially more of it, and this time will be no exception.
Holds AO Addy Osmani
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
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
Fiscal multipliers vary across time and place but are generally nonzero, positive for spending, negative for taxes, and larger when monetary policy cannot offset them.
Holds