Marc 🦇
@mrousavy.com
CEO of @margelo.com and react-native core contributor. I do lots of C++ and Swift
github.com/mrousavy
github.com/mrousavy
Pinned
Marc 🦇
@mrousavy.com
· Jun 22
got it, what now?
Reposted by Marc 🦇
Nitro has become the foundation for some of the most powerful React Native libraries today. At React Universe Conf 2025,
@mrousavy.com (@margelo.com) shared Nitro’s journey & what’s next with Nitro Image and VisionCamera.
▶️ youtu.be/25_FWxNh92A
@mrousavy.com (@margelo.com) shared Nitro’s journey & what’s next with Nitro Image and VisionCamera.
▶️ youtu.be/25_FWxNh92A
The Past, Present & Future of Nitro | Marc Rousavy at React Universe Conf 2025
YouTube video by Callstack
youtu.be
September 19, 2025 at 1:57 PM
Nitro has become the foundation for some of the most powerful React Native libraries today. At React Universe Conf 2025,
@mrousavy.com (@margelo.com) shared Nitro’s journey & what’s next with Nitro Image and VisionCamera.
▶️ youtu.be/25_FWxNh92A
@mrousavy.com (@margelo.com) shared Nitro’s journey & what’s next with Nitro Image and VisionCamera.
▶️ youtu.be/25_FWxNh92A
Hey @grebenyuk.bsky.social - I'm looking for the Image-Frameworks-Benchmark repo you linked in your Nuke landing page to see an up-to-date comparison between SDWebImage and Nuke.
Is that repo gone?
Is that repo gone?
June 30, 2025 at 1:09 PM
Hey @grebenyuk.bsky.social - I'm looking for the Image-Frameworks-Benchmark repo you linked in your Nuke landing page to see an up-to-date comparison between SDWebImage and Nuke.
Is that repo gone?
Is that repo gone?
Nitro almost has 1k stars... 🤩
February 23, 2025 at 3:35 PM
Nitro almost has 1k stars... 🤩
another day, another react-native core PR merged
February 20, 2025 at 9:31 AM
another day, another react-native core PR merged
Another PR by me to Bluesky merged 🥰
just merged this PR from @mrousavy.com to improve android startup times - in my testing, I saw ~4% speedup, but Marc has seen upwards of 12% in other apps. awesome stuff!
github.com/bluesky-soci...
github.com/bluesky-soci...
Make Android app start faster by disabling JS bundle compression by mrousavy · Pull Request #7751 · bluesky-social/social-app
Disables compression for the .bundle resource files in the .apk.
This makes the .apk a bit bigger, but improves startup time on Android - we measured a 400ms startup improvement (12%) in one of our...
github.com
February 17, 2025 at 3:46 PM
Another PR by me to Bluesky merged 🥰
react-native-mmkv is still the fastest storage solution for React Native! 🔥
Seems like MMKV is still king!
But also, props to AsyncStorage went from 240ms down to 50ms since React Native 0.68!
But also, props to AsyncStorage went from 240ms down to 50ms since React Native 0.68!
January 12, 2025 at 3:37 PM
react-native-mmkv is still the fastest storage solution for React Native! 🔥
Reposted by Marc 🦇
Which storage solution is best for your @expo.dev project?
I took @mrousavy.com benchmark repo, moved it to expo, and added expo-sqlite too.
Results 👇
I took @mrousavy.com benchmark repo, moved it to expo, and added expo-sqlite too.
Results 👇
January 12, 2025 at 3:33 PM
Which storage solution is best for your @expo.dev project?
I took @mrousavy.com benchmark repo, moved it to expo, and added expo-sqlite too.
Results 👇
I took @mrousavy.com benchmark repo, moved it to expo, and added expo-sqlite too.
Results 👇
use MMKV! 😉🚀
The cool #buildinpublic thing of the day.
I benchmarked energyxp.app startup time on different devices and switched from async storage to mmkv.
60% faster on my iPhone!
@mrousavy.com Kudos, that's some amazing work!
I benchmarked energyxp.app startup time on different devices and switched from async storage to mmkv.
60% faster on my iPhone!
@mrousavy.com Kudos, that's some amazing work!
December 26, 2024 at 2:34 PM
use MMKV! 😉🚀
if you know this logo i respect you
December 19, 2024 at 10:40 PM
if you know this logo i respect you
Nitro 19 is out!!! 🥳
github.com/mrousavy/nit...
github.com/mrousavy/nit...
Release Release 0.19.0 · mrousavy/nitro
0.19.0 (2024-12-18)
✨ Features
Allow std::future to go bi-directional (using new Promise impl) (#411) (283f1f5)
Default-calculate getSizeOf(...) so the user doesn't have to (#429) (5b510b8)
Implem...
github.com
December 18, 2024 at 4:07 PM
Nitro 19 is out!!! 🥳
github.com/mrousavy/nit...
github.com/mrousavy/nit...
i hope no one reads my commit messages
December 10, 2024 at 3:28 PM
i hope no one reads my commit messages
still can't believe how smooth VisionCamera + Skia is - this face blur Skia filter runs in a JS Frame Processor at 120 FPS! 🤯
December 2, 2024 at 4:59 PM
still can't believe how smooth VisionCamera + Skia is - this face blur Skia filter runs in a JS Frame Processor at 120 FPS! 🤯
@sebjvidal.bsky.social good to see you here!
November 30, 2024 at 12:45 PM
@sebjvidal.bsky.social good to see you here!
Reposted by Marc 🦇
Introducing Unistyles 3.0! ✨
After months of development, I’m excited to present the brand-new version of Unistyles. We’ve shipped a ton of new features that will redefine how you build your React Native applications. 🧵
After months of development, I’m excited to present the brand-new version of Unistyles. We’ve shipped a ton of new features that will redefine how you build your React Native applications. 🧵
November 29, 2024 at 3:14 PM
Introducing Unistyles 3.0! ✨
After months of development, I’m excited to present the brand-new version of Unistyles. We’ve shipped a ton of new features that will redefine how you build your React Native applications. 🧵
After months of development, I’m excited to present the brand-new version of Unistyles. We’ve shipped a ton of new features that will redefine how you build your React Native applications. 🧵
had a chance to drive this beautiful Murcielago recently - that thing is truly a piece of fine italian art
November 28, 2024 at 12:03 AM
had a chance to drive this beautiful Murcielago recently - that thing is truly a piece of fine italian art
i should touch some grass
November 26, 2024 at 11:52 AM
i should touch some grass
if VisionCamera runs on this 11 year old tablet, it can run anywhere! 💪
November 25, 2024 at 2:30 PM
if VisionCamera runs on this 11 year old tablet, it can run anywhere! 💪
creating a custom "callable" implementation in C++ - man, capturing stack-allocated arguments in a possible heap context is hard...
November 22, 2024 at 1:14 PM
creating a custom "callable" implementation in C++ - man, capturing stack-allocated arguments in a possible heap context is hard...
Reposted by Marc 🦇
And finally @mrousavy.com doing some Marc Rousavy / Nitro stuff 🧨 (10/10🧵)
November 21, 2024 at 5:30 PM
And finally @mrousavy.com doing some Marc Rousavy / Nitro stuff 🧨 (10/10🧵)
I'm live on youtube www.youtube.com/watch?v=Kx-T...
Abusing C++ templates
YouTube video by mrousavy
www.youtube.com
November 21, 2024 at 6:45 PM
I'm live on youtube www.youtube.com/watch?v=Kx-T...
no better feeling than seeing 100% of your tests pass
November 20, 2024 at 9:12 PM
no better feeling than seeing 100% of your tests pass