---
title: "Tips & Tricks From The Ultimate Guide to React Native Optimization 2025"
description: "View flattening, React 19 hooks, real DevTools tips-learn what actually helps your React Native app run faster."
url: https://www.callstack.com/events/tips-tricks-from-the-ultimate-guide-to-react-native-optimization-2025
updated: 2026-10-24T08:39:22.624Z
---

# Tips & Tricks From The Ultimate Guide to React Native Optimization 2025

View flattening, React 19 hooks, real DevTools tips-learn what actually helps your React Native app run faster.

_Talk · 4/24/2025 · Recording: 10:41 · Category: Performance_

Organizer: React Universe Meetup

Speakers: Oskar Kwaśniewski (Software Developer @ Callstack)

[Watch the recording](https://www.youtube.com/watch?v=rINiwWnYrJE)

In this talk from Callstack’s React Universe Meetup in San Francisco, Oskar Kwaśniewski shares hard-won performance insights from the [Ultimate Guide to React Native Optimization 2025](https://www.callstack.com/ebooks/the-ultimate-guide-to-react-native-optimization). If you’re building React Native apps today, and want them to stay fast tomorrow, this is a must-watch.

Packed with practical takeaways, Oskar walks through how to:

- Flatten views for a more efficient native hierarchy
- Use React 19’s new `use` and `useOptimistic` hooks
- Avoid FPS drops with JS thread hygiene
- Leverage the React Compiler for automatic memoization
- Actually use RN DevTools to find and fix bottlenecks

You’ll also see common pitfalls with TTI tracking, learn why crypto-heavy tasks shouldn’t live in JS, and hear how a 12% speed boost was hiding in Android builds all along.

**What you’ll walk away with:**

- Modern tools for debugging and measuring app performance
- Simple tweaks that yield measurable speed gains
- Insight into where performance wins (and losses) really come from