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# React Under Fire: Rendering Performance for Streaming Agent UIs


- **Event:** Conference India 2026

## Description

I have three years of experience building interfaces for AI agents, currently at Slack, where I work on agentic AI surfaces. As a developer working in this area daily, I have seen a consistent pattern: React applications that perform well under normal user interaction degrade quickly when connected to a streaming agent, where a single response can produce dozens of state updates per second.
In this session, I will cover the rendering and state management challenges specific to agentic UIs, drawing from production experience and from a public benchmark I built to measure rendering strategies under real agent event streams.
The session will address three areas. First, state architecture: how partial and final text differ as state shapes, why conventional Redux patterns struggle with high-frequency token streams, and what alternatives exist. Second, implementation tradeoffs: when a streaming library is justified, when a custom buffering layer is the better choice, and how primitives like useSyncExternalStore fit in. I will demonstrate these comparisons through live coding, with performance measurements for each approach. Third, standards: what the AG-UI protocol currently specifies for agent-to-UI communication, and where it leaves decisions to the implementer.

## Speaker

### [Abhirupa Mitra](https://www.wearedevelopers.com/@abhirupa-mitra)

Senior Frontend Engineer, SMTS, at SLACK, Salesforce


## Related talks at this congress

- [Architecting Trusted AI: Coupling Multi-Agent Systems with dbt Semantic Store for Zero-Hallucination](https://www.wearedevelopers.com/events/conference-india-2026/sessions/1976-architecting-trusted) — Pushkar Mishra
- [From Profiler to Production: Measuring What Actually Matters in React & React Native](https://www.wearedevelopers.com/events/conference-india-2026/sessions/1983-from-profiler-to) — Andrei Tazetdinov
- [Build a Zero-Cost AI Agent in Your Browser](https://www.wearedevelopers.com/events/conference-india-2026/sessions/1980-build-a-zero-cost-ai) — Aishwarya Mathuria, Nishant Thakur
- [ULTRON: Your Agent Has No Hands - Real-Time Voice, MCP, and Ten Phones on Stage](https://www.wearedevelopers.com/events/conference-india-2026/sessions/1997-ultron-your-agent) — Sagar Tamang

## Watch remotely

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## Links

- [Get tickets](https://www.wearedevelopers.com/conference-india/tickets)