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Sep 15, 2026Write the reference before debugging the shader
The Flash Attention 2 path was easier to finish after the algorithm existed in plain JavaScript...
Sep 15, 20261 min read0 reactions0 comments
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Sep 14, 2026The browser-training speedup was a curve, not one headline number
The WebGPU path did not have one honest speedup number. Against multithreaded WASM SIMD, the...
Sep 14, 20261 min read0 reactions0 comments
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Sep 13, 2026The more aggressive matmul kernel lost to the register budget
The WebGPU matmul sweep started with a naive kernel, then added 16 by 16 workgroup tiling and a 4 by...
Sep 13, 20261 min read0 reactions0 comments
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Sep 13, 2026MyZubster Devlog: From Videos to Neon Plaza, Darkode, and N4K48
Over the past few days, MyZubster has evolved from a collection of ideas, repositories, and visual...
Sep 13, 20266 min read0 reactions0 comments
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Sep 12, 2026Memory64 moved the browser ceiling and exposed an ABI gap
A 32-bit WebAssembly heap put the browser playground near a 4 GB ceiling. With weights and AdamW...
Sep 12, 20261 min read0 reactions2 comments
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Sep 11, 2026A learning roadmap is stronger when every lesson touches the system
PostTrainLLM's curriculum begins with a model as a parameterized function and ends with evaluation...
Sep 11, 20261 min read0 reactions0 comments
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Sep 14, 2026"[260914] 외부 시세 데이터가 통째로 비어버린 날 - 유니버스 오염 사고"
시가총액 데이터가 전부 비어버리자 종목 구성 순위가 알파벳순으로 둔갑했고, 이를 막는 3중 방어층을 새로 넣었습니다. 시가총액이 전부 비어서 생긴 일 오늘 아침...
Sep 14, 20261 min read0 reactions0 comments
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Sep 14, 2026"[260914] The Day Market-Cap Data Came Back Empty - A Universe Contamination Incident"
When market-cap data came back entirely empty, stock rankings silently reverted to alphabetical order...
Sep 14, 20263 min read0 reactions0 comments
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Sep 13, 2026"[260907~0913] 공유계좌 실거래 전환 - 계좌 구분값 누락이 반복해서 문제를 일으켰다"
새 공유계좌로 실거래를 시작했고, 그 과정에서 계좌 구분값을 안 넘기거나 전역으로 공유해버리는 같은 유형의 버그가 킬스위치 오발과 강제매도로 여러 번 반복됐습니다 ...
Sep 13, 20261 min read0 reactions0 comments
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Sep 13, 2026"[Sep 07-13] Moving to a Shared Live Account - The Same Missing-Account-ID Bug Kept Recurring"
I started live trading through a new shared account, and along the way the same class of bug kept...
Sep 13, 20265 min read0 reactions0 comments
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Sep 13, 2026"[Sep 13] Kill-Switch Postmortem - the Root Cause Was Still There"
Yesterday I patched the symptom of a false kill-switch trip in a hurry. Today's postmortem found the...
Sep 13, 20264 min read0 reactions0 comments
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Sep 9, 2026The fine-tune looked better because the evaluation was broken
One early fine-tune appeared to beat its baseline. The result disappeared when the baseline and...
Sep 9, 20261 min read0 reactions0 comments