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← A profiler measures time already spent in an operation, not how much time would be saved by optimizing it.

11 connected korrents · 8 moments on record from 18 Dec 2023 to 16 Sept 2026.

Everything filed under compilers compilers Everything filed under software performance software performance Everything filed under code generation code generation Same subjectSame subjectSame subjectSame subjectSame subjectSame subjectSame subjectSame subjectSame subjectSame subjectSame subject Read this korrent: A profiler measures time already spent in an operation, not how much time would be saved by optimizing it. A profiler measures time already spent inan operation, not how much time would besaved by optimizing it. Last stated 3 years ago 18 Dec 2023 NE Nelson Elhage — holds since 2023-12-18 — tap for who they are Same subject: Profilers show where time is spent but not which of that time can feasibly be reduced or is worth optimizing. — tap to centre the map on it Profilers show where time is spentbut not which of that time canfeasibly be reduced or is worthoptimizing. Last stated 3 years ago 18 Dec 2023 NE Nelson Elhage — holds since 2023-12-18 — tap for who they are Same subject: Optimization means measuring the gap between your code and what the hardware could theoretically do, not making changes and checking whether the statistics improved. — tap to centre the map on it Optimization means measuring the gapbetween your code and what thehardware could theoretically do, notmaking changes and checking whetherthe statistics improved. Last stated 4 weeks ago 26 Aug 2026 CM Casey Muratori — holds since 2026-08-26 — 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 areal question, and web performanceonly became measurable once it wasbroken into the distinct moments auser actually notices. Last stated a month 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 safeadvice only if every engineeralready knew how to avoid thearchitectural mistakes that no lateroptimization can remove. Last stated 4 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 isnot an achievement but an admission:300 milliseconds is an eternity incomputing, and a product pitching itshows how far the bar has fallen. Last stated 4 weeks ago 26 Aug 2026 CM Casey Muratori — holds since 2026-08-26 — tap for who they are Same subject: A model can now port essentially any codebase from one programming language to another, work that used to take a team over a year. — tap to centre the map on it A model can now port essentially anycodebase from one programminglanguage to another, work that usedto take a team over a year. Last stated 2 months ago 27 Jul 2026 BC Boris Cherny — holds since 2026-07-27 — tap for who they are Same subject: Agent-generated pull requests have exploded in size with no signs of slowing down — tap to centre the map on it Agent-generated pull requests haveexploded in size with no signs ofslowing down Last stated 5 days ago 16 Sept 2026 GO Gergely Orosz — holds since 2026-09-16 — tap for who they are Same subject: Agents are the new compilers that compile intent into fast software. — tap to centre the map on it Agents are the new compilers thatcompile intent into fast software. Last stated a week ago 12 Sept 2026 GR Guillermo Rauch — holds since 2026-09-12 — 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 IDEhas to be lazy and deferredthroughout — a different way ofbuilding compilers from the one thetextbooks 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 achange breaks turns refactoring intofixing errors until the compilerstops 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 acompiler but an experience: editing,running, debugging and the runtimelibrary all have to fit together asone cycle. Last stated 4 months ago 13 May 2026 AH Anders Hejlsberg — holds since 2026-05-13 — tap for who they are
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At the centre A profiler measures time already spent in an operation, not how much time would be saved by optimizing it. Last stated 18 Dec 2023 · 3 years ago Holds Nelson Elhage Read this korrent →