Interests

Morning tsukemen at Rokurinsha, Tokyo Station Ramen Street — Morning tsukemen at RokurinshaOnly served from 7:30 to 9:30 a.m.Tokyo Station Ramen Street · 2026

Échiré L'Atelier du Beurre, Azabudai Hills, Tokyo — Échiré L'Atelier du BeurreAzabudai Hills, Tokyo · 2026

Orange financier, Noix de Beurre, Isetan Shinjuku — Orange financier, Noix de BeurreBasement floor of Isetan. One of Tabelog's top 100 sweet shops in Tokyo.Isetan Shinjuku · 2026

Shoyu chukamen, Shibuya — Shoyu chukamenShibuya · 2026

Abeno at dusk, Abeno Harukas, Osaka — Abeno at duskFrom the observatory 300 m up, on floors 58 to 60.Abeno Harukas, Osaka · 2026

Sunset over Osaka, Abeno Harukas, Osaka — Sunset over OsakaAbeno Harukas, Osaka · 2026

Straight down, Abeno Harukas, Osaka — Straight downThe Tennoji crossing, 300 m below.Abeno Harukas, Osaka · 2026

Tokyo Station tracks, KITTE Garden, Marunouchi — Tokyo Station tracksThe rooftop garden looks straight down on the shinkansen tracks.KITTE Garden, Marunouchi · 2026

Cat Café MOCHA, Shibuya — Cat Café MOCHAShibuya · 2026

teamLab Borderless, Azabudai Hills, Tokyo — teamLab BorderlessMoved here from Odaiba and reopened in February 2024.Azabudai Hills, Tokyo · 2024

Tokyo from the Skytree, Sumida, Tokyo — Tokyo from the SkytreeSumida, Tokyo · 2024

Cat café, Shinjuku — Cat caféShinjuku · 2024

The Dish trail, Stanford — The Dish trailThe loop passes a 150-foot radio telescope, in use since 1961.Stanford · 2026

Golden Gate Bridge, Lands End, San Francisco — Golden Gate BridgeLands End, San Francisco · 2026

Go Borgs!, Stanford — Go Borgs!Stanford · 2026

Sunset at Sutro Baths, Lands End, San Francisco — Sunset at Sutro BathsRuins of Adolph Sutro's seawater pools, opened in 1896.Lands End, San Francisco · 2025

El Capitan, Yosemite — El Capitan3,000 feet of granite above the valley floor.Yosemite · 2025

Bixby Creek Bridge, Big Sur — Bixby Creek BridgeFinished in 1932, 260 feet above the creek.Big Sur · 2025

Essays

AI research is a max-performance domainJason WeiYou are judged by your best five works, not your average, so one exceptional skill beats being well-rounded.2025 On the Slow Death of ScalingSara HookerThe link between compute and performance is weakening, and scaling alone misses where progress comes from next.2025 What Is Taste?Yoonho LeeTaste is a fast, wordless filter you pick up through practice and by working near good people.2026 The “it” in AI models is the datasetJames BetkerTrain long enough and every architecture lands in the same place. The model is the data.2023 An Opinionated Guide to ML ResearchJohn SchulmanPicking the right problem matters more than raw skill. How to pick, keep moving, and keep growing.2020 95%-ile isn't that goodDan LuuMost people who do a thing never try to fix their obvious mistakes, so modest deliberate practice puts you near the top.2020

Source code

DeepGEMMDeepSeekFor kernels. Read the source itself, not the README.DeepEPDeepSeekFor communication, and what large-scale MoE parallelism really means. Read the kernels.DeepInferDeepSeekA state-of-the-art model runner, built for DeepSeek's own models.

Blogs

Yifan YangGPU inference at Anthropic, previously NVIDIAShort, exact posts on CuTe layouts, TMA, tensor core swizzles, PDL and Blackwell MMA descriptors.Changyi YangRL infrastructureWhy MLA and MTP fight each other, delta weight sync for RL, and how SGLang loads weights and serves LoRA.

Records

My favorite recording of each piece.

Beethoven: Sonata No. 23 “Appassionata”

Sviatoslav Richter1960

Chopin: Études, Opp. 10 & 25

Maurizio Pollini1972

Chopin: Ballades Nos. 3 & 4

Krystian Zimerman1988

Chopin: Piano Concerto No. 1

Krystian Zimerman, Polish Festival Orchestra1999

Live recordings

Great Hall, Moscow Conservatory20 April 1986

Horowitz in Moscow

Vladimir Horowitz

Kammermusiksaal, Berlin Philharmonie2001

Bach–Busoni: Chaconne in D minor

Hélène Grimaud

Auditorium Maurice Ravel, Lyon7 November 2014

Liszt: 12 Transcendental Études

Daniil Trifonov

Chopin Competition, WarsawOctober 2015

Chopin: Polonaise in A-flat, Op. 53

Seong-Jin Cho

Yellow Lounge, Berlin2016

Chopin: Ballade No. 1 in G minor

Seong-Jin Cho

Chopin Competition, Warsaw20 October 2021

Chopin: Piano Concerto No. 1, final round

Bruce Liu

Cliburn Competition, Fort Worth17 June 2022

Rachmaninoff: Piano Concerto No. 3

Yunchan Lim