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← The steady stream of "we had to rewrite the whole thing because it was…

8 connected korrents · 5 moments on record from 22 Mar 2026 to 26 Aug 2026.

Same subjectSame subjectSame subjectSame subjectSame subjectSame subjectSame subjectSame subject Read this korrent: The steady stream of "we had to rewrite the whole thing because it was too slow" engineering blog posts is the proof that deferring performance to hotspot optimization does not work. The steady stream of "wehad to rewrite the wholething because it was too… CM Casey Muratori — holds since 2026-08-26 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 hotspots barely matters… CM Casey Muratori — holds since 2026-08-26 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… CM Casey Muratori — holds since 2026-08-26 Same subject: Performance work used to mean half a day reading traces before writing a single fix, and language models have collapsed that step to minutes. — tap to centre the map on it Performance work usedto mean half a day… AO Addy Osmani — holds since 2026-08-19 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 modelsand agents write is… ES Elizabeth Stone — holds since 2026-07-19 Same subject: Repeated rewrites are the correct answer under fast growth, because a system specified to scale forever would take so long to build that the company would die before it shipped. — tap to centre the map on it Repeated rewrites arethe correct answer… TP Thuan Pham — holds since 2026-04-01 Same subject: AI did not create the bottlenecks in software delivery; it threw gas on processes everybody already knew were weak. — tap to centre the map on it AI did not create thebottlenecks in software… NF Nicole Forsgren — holds since 2026-03-22 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… AO Addy Osmani — holds since 2026-08-19 Same subject: Performance cannot win a market on its own: against an incumbent held up by network effects, being far more responsive is a nice plus and nothing more. — tap to centre the map on it Performance cannot wina market on its own… CM Casey Muratori — holds since 2026-08-26
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At the centre The steady stream of "we had to rewrite the whole thing because it was too slow" engineering blog posts is the proof that deferring performance to hotspot optimization does not work. Holds CMCasey Muratori Read this korrent →