Mo Binni

Online Instructor

[Mo Binni @mobinni]

@jmeistrich I agree! It’s just the performance floor is worse and it’s hard to keep performant code as your organization scales

[Mo Binni @mobinni]

@tomekzaw_ @swmansion @appjsconf I feel like I should have won this 5 times over 😂

[Tomasz Zawadzki @tomekzaw_]

React Native bug that's been crashing Android apps for 8 years 💥

𝚓𝚊𝚟𝚊.𝚕𝚊𝚗𝚐.𝙸𝚕𝚕𝚎𝚐𝚊𝚕𝙰𝚛𝚐𝚞𝚖𝚎𝚗𝚝𝙴𝚡𝚌𝚎𝚙𝚝𝚒𝚘𝚗: 𝚒𝚗𝚟𝚊𝚕𝚒𝚍 𝚙𝚘𝚒𝚗𝚝𝚎𝚛𝙸𝚗𝚍𝚎𝚡 -𝟷 𝚏𝚘𝚛 𝙼𝚘𝚝𝚒𝚘𝚗𝙴𝚟𝚎𝚗𝚝

Now it's fixed!

https://t.co/zEcbVHFAJJ

[Brotzky @brotzky]

Introducing https://t.co/ycxJEf1z7w!

A new space where I explore how the best apps in the world are built.

First piece:
How's Linear is so fast? a technical breakdown.

https://t.co/9Vu1syrn1i

[Mo Binni @mobinni]

👏

[Brotzky @brotzky]

Introducing https://t.co/ycxJEf1z7w!

A new space where I explore how the best apps in the world are built.

First piece:
How's Linear is so fast? a technical breakdown.

https://t.co/9Vu1syrn1i

[Mo Binni @mobinni]

@janicduplessis And optimizing for the cost of the conversation 😂

[Łukasz Kosmaty @lkosmaty]

Shipped a last-minute Expo SDK 56 feature: up to 2.8x faster codegen compilation on Android.

Enable it with `android.usePrecompiledHeaders: true` in expo-build-properties.

Next, I'll try upstreaming this to React Native so everyone benefits from faster builds.

[Mo Binni @mobinni]

@mrousavy Did you test any specific vendors to land own aws device farm? Have you found it reliable?

[Mo Binni @mobinni]

I’ve been focused on this exact problem for a year. The issue as you state is o11y, upfront testing only gets you so far. Tracking ram, cpu, frame usage is a lagging indicator because release cycles are long. If you sample this from your user base in production it’s often too late.

Running e2e tests with perfetto measurements is one way to catch regressions, operationalizing them is expensive.

I’ve tried compiling Hermes’ from source to run targeted HBC performance tests and it proved to be useful. At the end of the day the major foot guns are: not memoizing Intl formatters, poor animation code, third party libraries cause a lot of toil. Happy to go into more detail if you want to reach out

[Mo Binni @mobinni]

@peterpme @Jassi22G_ How is the upgrade to 56? Many regressions?

[Mo Binni @mobinni]

@tsapeta I JUST finished the 55 upgrade 😭

[Mo Binni @mobinni]

@expo I don’t want to jinx anything but 54 to 55 might have been the smoothest upgrade ever

[Mo Binni @mobinni]

@jonathan_wilke I would keep it lightweight something with not a lot of external dependencies probably expo UI and vanilla styles

[Mo Binni @mobinni]

@peterpme Took me a month of intense focus to grind through and at the end of it, it exposed every flaw the bridge was hiding and our over reliance on a single thread to do everything

[Mo Binni @mobinni]

@peterpme Using pnpm to hoist the modules saves space but it breaks building from source. I’ve been thinking about using sparse checkout but then you’re limited in testing end to end

[Mo Binni @mobinni]

@tmikov It’s truly wild 😮‍💨

[Mo Binni @mobinni]

@peterpme "I went to the depths of perf hell" nothing has resonated more deeply with me ever

[Mo Binni @mobinni]

My first upstream contribution to React Native landed - https://t.co/RbbKxlfrUN thanks @tomekzaw_ for all your help 🙏

[Tomasz Zawadzki @tomekzaw_]

Need to show LLM output in your RN app? 🤖

Here's a fully native component from 𝚛𝚎𝚊𝚌𝚝-𝚗𝚊𝚝𝚒𝚟𝚎-𝚎𝚗𝚛𝚒𝚌𝚑𝚎𝚍-𝚖𝚊𝚛𝚔𝚍𝚘𝚠𝚗 with support for streaming Markdown.

Let us know if you find this useful for your project.

[Alzea | Orenji Studio @helloalzea]

@KulZhanibek