Disclaimer: This page was written in 2023. I may have forgotten many things and details. See also blog and LinkedIn.

2022

• [web standard] Subresource Loading with Web Bundles spec
• [chrome] Shipped Subresource Loading with Web Bundles
• [doc] Web Bundles v2 plan: Make resource loading better with ESM and Web Bundles
• [contest / rust] ICFP Content 2022 (hayatoito/icfp2022)

2021

• [team] Tech Lead Manager of Web Bundles team
• [chrome] Fast and Secure Ads Loading with Web Bundles
• [article] Resource Loading with Content Addressable Bundles
• [contest] ICFP Content 2021 (hayatoito/icfp2021)
• [rust / fun] Ray Tracing in One Weekend (hayatoito/raytracing)

2020

• [chrome] Intent to Prototype: Subresource Loading with Web Bundles project
• [rust] Started Chrome-Rust
• [rust] Started google/webbundle project
• [contest / rust] ICFP Content 2020 (hayatoito/icfp2020)

2019

• [chrome] Designed and implemented Fast Flat Tree Traversal. Shipped in Chrome M69.
• [chrome] Designed and implemented Slots-In-Flat-Tree (with furthunk@). Shipped in Chrome M67.
• [chrome] Made the virtual-scroller's renderring 300% faster (CL)
• [chrome] Designed and implemented Imperative Shadow DOM Distribution Design Doc
• [rust / fun] Serval - an Experimental Web Browser Engine
• [contest / rust] ICFP Content 2019 (hayatoito/icfp2019)
• [advisor / kings viking] 【制作裏話】漫画『王様達のヴァイキング』さだやす先生 × 技術協力の二人が明かす、“リアル × エンタメ”の超絶バランスを生んだチームワークとは？
• [contest / rust] ICFP 2006 in Rust hayatoito/icfp2006

2018

• [chrome] Designed and implemented Incremental Shadow DOM
• [contest / rust] ICFP Content 2018 (hayatoito/icfp2018)
• [advisor / kings viking] Received a letter of appreciation from the Miyagi Prefectural Police (感謝状)
• [fun] Static Site Generator: site

2017

• [kings viking] 『王様達のヴァイキング』第 13 集発売記念】サイバーセキュリティ業界も注目!! リアルすぎるエピソードにエンジニアも驚愕!? 「世界を変えるキャラクターとは？」SECCON2016 トークセッションレポート（前編）
• [contest] ICFP Content 2017 (hayatoito/icfp2017) (article: Rust が最強のプログラミング言語である証明)

2016

• [team] Tech Lead of DOM team
• [contest / rust] ICFP Content 2016 (hayatoito/icfpc2016-origami)
• [rust] TAPL in Rust (hayatoito/tapl-in-rust)

2015

• [contest / scala] ICFP Content 2015 (hayatoito/icfpc2015)

2014

• [award] Received a Spot Bonus for Web Components; darin@ said: "You changed the world in designing and delivering Web Components".
• [chrome / award] Speed Hall of Fame: Lazy evaluation of event.path by numbering TreeScopes in DFS order for later O(1) queries
• [contest] ICFP Content 2014 (No repository?)

2013

• [chrome] Rewrote StyleResolver.
• [contest / scala] ICFP Content 2013 (hayatoito/icfpc2013-kirakira)
• [web standard] Shadow DOM specification (archive: 1, 2, original)
• [web standard / chrome] Specced and implemented a new distribution algorithm
• [web standard / chrome] Specced and implemented a focus navigation for Shadow DOM, which is based on a tree of trees
• [web standard] Specced and implemented an Event Path API (Q1’2013)
• [advisor / kings viking] Started as a technical advisor for Kings' Viking (王様達のヴァイキング)

2012

• [web standard] Designed and implemented Shadow DOM - New Event Model. dglazkov@ mentions this on Google+, “+Hayato Ito is the Shadow DOM Events Wizard”.
• [fun] COOL Compiler (hayatoito/cool-compiler)

2011

• [chrome] Designed and implemented a non-recursive iterative algorithm to match CSS rules in CSS Selector.
• [chrome] Implemented GDB’s pretty printer for WebKit classes.
• [chrome] Updated upload.py (reviewed by guido@)
• [fun] Mini-Python - Yet another Python Interpreter written in C++ (hayatoito/mini-python)

2010

• [webkit] Became WebKit Committer (Q3’2010 ). Nominated by Darin Adler (Apple).
• [chrome / WebKit] Supported Reftests in WebKit (document)
• [chrome / WebKit] Implemented CSS3 Paged Media specification, based on on dynamic programming.

2009

• [chrome] Became Chromium Committer (Q4’2009)

2008

• [team] Joined Google
• [contest / algorithm] Became a RedCoder at TopCoder (gentoo)

2007

• [publication] Test First Programming, Eclipse Perfect Manual Best Selection, September 2007

2006

• [publication] All about Apache Geronimo - open source J2EE server, JavaWorld Magazine, July 2006

2005

• [publication] Performance Improvement of J2EE Clustering Systems through Application Partitioning, IBM Professional Paper, IBM's PROVISION No.47, published by IBM Japan, Ltd., 2005

2004

• [publication] Application Profiling, Eclipse Perfect Manual, August 2004

2003

• [publication] Test First Programming by JUnit, Eclipse Perfect Manual, September 2003