React Universe On Air
Callstack
React Universe On Air is your go-to podcast about building cross-platform apps with React and React Native, featuring practical lessons, forward-looking ideas, and talks with industry leaders.
Episodes
Mentioned books

May 12, 2021 • 1h 4min
React Native 0.64 with Hermes for iOS | React Universe On Air #5
In this episode of React Universe On Air (formerly known as The React Native Show Podcast), our host, Mike Grabowski, and his guests:
- Eloy Durán, a Software Engineer at Microsoft (https://twitter.com/alloy)
- and Xuan Huang, a Software Engineer at Facebook (https://twitter.com/Huxpro)
talk about the latest React Native 0.64 release which comes with Hermes support for iOS!
It’s a great opportunity to know the details of this major update to React Native 0.64 because Mike, Eloy and Xuan worked together on bringing Hermes to iOS!
In the first part of the podcast, our experts focus on the following topics:
- Hermes improvements to React Native apps in terms of three metrics: Time To Interactive (TTI), Application Size (APK), Memory consumption
- The “magic” behind Hermes - “Bytecode Precompilation” a.k.a. AOT
- The difference between AOT and JIT
- JIT JS engine pipeline vs Hermes pipeline
- The Hermes roadmap and plans for further improvements
Later on, Mike and his guests talk about the story behind bringing Hermes to React Native MacOS and take a quick look into the future of this major update.
In this part, they cover the following topics:
- What was the motivation behind adding support for Hermes on MacOS? Any plans for RN Windows?
- Were there any attempts to bring Chakra to run on macOS, to say, provide more unified experience across desktop platforms?
- On Apple devices, unlike Android ones, there was always less of performance and memory related issues when it comes to running React Native applications. What would be the selling point of Hermes in such a case?
This and much more awaits you in the Episode #5 of The React Native Show!
Don’t forget to push the Subscribe button and share this video on your social media. More episodes are coming soon!
Check out more episodes of The React Native Show
https://callstack.com/podcast-react-native-show?utm_campaign=Hermes_MB&utm_source=soundcloud&utm_medium=social&utm_content=hermes_podcast
Read more about Hermes on iOS
1. Bringing Hermes to iOS in React Native 0.64
https://callstack.com/blog/bringing-hermes-to-ios-in-react-native/?utm_campaign=Hermes_MB&utm_source=soundcloud&utm_medium=social&utm_content=hermes_podcast
2. Hermes Performance on iOS
https://callstack.com/blog/hermes-performance-on-ios/?utm_campaign=Hermes_MB&utm_source=soundcloud&utm_medium=social&utm_content=hermes_podcast

Apr 2, 2021 • 47min
Expert Guide To React Navigation | React Universe On Air #4
In this episode of React Universe On Air (formerly known as The React Native Show Podcast), our host, Mike Grabowski, and his guests:
Satya Sahoo and Mateusz Kosoń, software engineers at Callstack, are talking about the React Navigation library.
During the conversation, they cover a wide range of topics related to the React Navigation library, including:
- What is React Navigation library and what’s its biggest selling point?
- What was the idea behind creating the React Navigation library?
- How did it happen that React Navigation became a “recommended” library in the community?
- What’s coming up with the React Navigation v5?
- What issues does React Navigation v5 solve?
- What do our guests appreciate most about React Navigation v5?
Also, our guests gave us some sneak peaks at what’s coming up with the upcoming React Navigation v6.0!
Sit back, relax and enjoy The React Native Show!
Don’t forget to push the Subscribe button and share this video on your social media. More episodes are coming soon!
Video version:
https://www.youtube.com/watch?v=S2uZe6AkZOM&t=1s

Dec 15, 2020 • 35min
Dive Into React Native Paper UI Kit | React Universe On Air #3
Is UI kit good for your next mobile app? Well, React Native Paper definitely is!
- The third episode of React Universe On Air (formerly known as The React Native Show Podcast).

Oct 15, 2020 • 57min
RNEU 2020 Conference Q&A Panel | React Universe On Air #2
Episode 2 RNEU 2020 Conference Q&A Panel
In episode 2 of React Universe On Air (formerly known as The React Native Show Podcast) Mike Grabowski host a Q&A panel answering questions from React Native EU 2020 conference.
The guests include:
- Monica Restrepo - Software Engineer at Major League Soccer
- Kudo Chien - Software Engineer at CloudMosa
- Eloy Duran - Principal Software Engineer at Microsoft
- Ram N - an Engineering Manager at Oculus
Some of the questions from the conversation:
- What is the status of the React Native re-architecture?
- What changes are already shipped and when do we expect to have an update on the rest of them?
- Where one can track updates on the re-architecture?
- Can we expect a smooth transition path between current and “new” React Native ?
- What was the biggest (and latest) performance challenge that you have faced at your job and how did you solve it? What were the takeaways from the solution?
- What is the feature that you’re most excited about that’s coming up?

Jul 29, 2020 • 55min
Look into the future of React Native Testing Library | React Universe On Air #1
✨ In September 2024, The React Native Show has become React Universe On Air ✨
Episode 1 - Look into the future of React Native Testing Library with Michał Pierzchała
In the first episode of our podcast, Mike "grabbou" Grabowski(the host) is talking about React Native Testing Library with his guest - Mike Pierzchała (thymikee) who is the owner of the library.


