How Kuaishou Scaled HarmonyOS: Technical Practices Unveiled at HDC 2026
The article outlines Kuaishou's seven technical sessions at HDC 2026, detailing solutions for HarmonyOS large‑scale deployment such as startup performance, HD streaming, memory‑leak mitigation, cross‑platform framework adaptation, KMP integration, ArkUI optimization, and AI‑native enhancements.
Session 1 – Rapid Iteration Startup Performance Assurance
Speaker: Zhang Weixiong, Kuaishou HarmonyOS Performance Lead
Time: June 13 09:30‑09:50
Abstract: The talk addresses cold‑startup performance challenges in large‑scale HarmonyOS deployment, presenting systematic practices including Ark Refiner‑TopLevel on‑demand instantiation, Ark Refiner‑Sendable capability, and core kernel fast‑launch techniques.
Outline:
Background and challenges of startup optimization
Ark Refiner‑TopLevel (on‑demand instantiation)
Ark Refiner‑Sendable
HarmonyOS kernel fast‑launch technology
Session 2 – Kuaishou HarmonyOS HD Live‑Streaming: Architecture Evolution and AI Empowerment
Speaker: Zheng Hang, Kuaishou Live‑Streaming Lead
Time: June 13 10:00‑10:20
Abstract: This session shares key practices for HD live‑streaming on HarmonyOS, covering KMP full‑chain architecture design, high‑real‑time cross‑language performance tuning, AI‑driven business integration, and ongoing work on experience optimization, interactive features, and AI‑Native architecture.
Outline:
Live‑streaming background and toolchain
Architecture and capture‑push chain breakdown
Full‑chain KMP architecture design
High‑real‑time cross‑language performance optimization
AI‑empowered business and engineering
Session 3 – Kuaishou HarmonyOS ArkTS Memory‑Leak Governance
Speaker: Yang Fan, Kuaishou Stability Engineer
Time: June 13 09:30‑09:50
Abstract: The presentation focuses on memory‑leak pain points during Kuaishou's HarmonyOS migration, describing a complete governance system spanning development, testing, and production that significantly reduces OOM rates, with typical code cases and tooling practices.
Outline:
Background and benefits of memory‑leak governance
Governance strategies
Tool usage and breakthroughs
Common leak case studies
Future outlook and new tool development
Session 4 – Kuaishou Cross‑Platform Framework KDS‑React HarmonyOS Adaptation
Speaker: Li Zhiqiang, Kuaishou Dynamic HarmonyOS Lead
Time: June 13 11:10‑11:30
Abstract: This talk covers the adaptation journey of Kuaishou’s self‑developed KDS‑React framework to HarmonyOS, highlighting large‑scale capability adaptation, continuous performance tuning, and AI‑Native contributions that boost overall efficiency.
Outline:
Efficient engineering practices for massive capability adaptation
Roadmap of performance experience optimization
AI‑Native assistance for platform and business efficiency
Session 5 – Kuaishou HarmonyOS KMP Technical Implementation
Speakers: Zhang Renjie & Zhou Xueyun, Kuaishou Front‑End Architects
Time: June 13 14:00‑14:20
Abstract: The session introduces KMP deployment on HarmonyOS, covering three aspects: K/N product split‑package solution to solve long compilation times and module coupling, a self‑built KNapi cross‑language call framework with 87% syntax coverage (including anonymous objects and complex generics) adopted by Huawei’s cross‑platform reference, and AI‑driven KMP migration efficiency.
Outline:
KMP evolution and overall overview
K/N product split‑package to tackle industry‑wide challenges
Self‑developed KNapi cross‑language capability
AI‑combined KMP cross‑platform migration efficiency
Session 6 – ArkUI Extreme Performance Features in Kuaishou
Speaker: Su Siyang, Kuaishou HarmonyOS Platform Lead
Time: June 13 16:50‑17:10
Abstract: The talk explains a parallel‑loading scheme that optimizes cold‑startup latency, shortens first‑screen display time, and leverages HarmonyOS 7.0 new features to deliver concrete performance improvements for high‑frequency core scenarios.
Outline:
Kuaishou business overview
Cold‑startup optimization
Fluidity experience enhancement
Performance evolution outlook
Session 7 – Kuaishou Quick‑Edit (Kuaiying) on HarmonyOS: Free and Efficient Video Editing
Speaker: Chen Jiayi, Quick‑Edit HarmonyOS Lead
Time: June 14 11:10‑11:30
Abstract: This session showcases innovative features such as background export & live‑window, stylus‑triggered quick‑menu, MovingPhoto GIF editing, and seamless migration from dual‑framework to single‑framework draft inheritance, illustrating how HarmonyOS capabilities are applied in a video‑editing product.
Outline:
Project history and overview of Quick‑Edit HarmonyOS version
Innovation 1: Background export & live‑window
Innovation 2: Stylus shortcut menu
Innovation 3: MovingPhoto GIF editing
Innovation 4: Seamless draft migration from dual to single framework
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