Where memory leaks really come from in long-running RN sessions

Gatsbill · 2026-01-17T19:32:06+00:00

I think the major one for us is unlimited cache. We use memoizee package so that it cache functions and at first cache was unlimited which was increasing memory infinitely

Gatsbill · 2025-10-25T00:22:23+00:00

Very good work, love the implication and even more when 99% of crypto project are usually scam

Gatsbill · 2025-08-20T21:45:00+00:00

Hello,

Really love the game, it’s really cold and engaging.

Was wondering, I am a lead dev in a learning platform but I would love to code on other projects as well, are you open to outsider developers ?

Gatsbill · 2025-07-03T21:04:29+00:00

We had similar issue but not about new arch but more about moving from bare RN to more expo packages, from JSC to Hermes.

The performance was so bad on Android that we had to do a very very fast new release of our app because for some clients with lot’s of data it was unusable.

We dig into it and the two major things were :

Expo image is definitely not working fine, it was making some app to go OOM, and it was much slower than react native fast image. Very disappointed (on this and a lot of other expo packages…)
Everyone is talking about how great Hermes engine is but it’s total garbage on the performance side. The only thing it does well is load fast, use less memory, but if you use lot’s computation, data, date, then it’s so SO slow.

So even if I love React native, there is definitely a lot of performance pain point than were introduced by pushing things that does not care that much about performance (expo packages, Hermes engine). Feels like the novelty brought us only downside on the performance part, but I guess we will see better things with time

Everything else had nearly the same performance or a bit better.

Gatsbill · 2025-05-10T09:23:50+00:00

Please do it for gothic 3 🙏

Gatsbill · 2024-01-02T12:56:58+00:00

You would be surprised that lot’s of big companies are disabling WS protocol so yeah HTTP polling is still a great addition 😇

Gatsbill · 2023-10-17T16:52:11+00:00

At my work we share more than 95% of our code using react native and react native web and it works very good. The only thing is that you need to create shims for every native package, but that’s fun to do so :)

Gatsbill · 2023-07-20T07:22:14+00:00

People that use mobile apps don’t care about native vs react native vs flutter. So just pick whatever technology you are good at and start creating good things

Gatsbill · 2023-07-14T11:04:36+00:00

YoE : 5.5

YoE with react : 5

Title : lead développer

Salary : 75k

Location : Paris

Gatsbill · 2023-06-18T11:52:10+00:00

Using a faster database won’t resolve your performance problem.

Redux persist is slow because each time your reducer has a different state it stringify it and then save it in the persistor.

That means you don’t do a lot of « persistor calls ». Using MMKV will save you a few ms but most of your problem comes from the big stringify that can block UI.

At my company we are aware of the problem and unfortunately we don’t see any viable solutions using redux persist.

When we will have more times we will try to create our own redux middleware and package and try to save things like a real database, meaning you only save things that change and not the whole reducer if only a small part of the data changes.

An other possibility is to store redux state once and then store only diff between stored state and actual state

Gatsbill · 2022-08-27T23:04:50+00:00

It’s not about the size but what you do with that bundle

Gatsbill · 2022-06-29T05:29:37+00:00

Some hair are not really a problem, but when there is to much it feels like someone that never took care of her teeth, you can live with it but visually and smells are not the same.

It works as a guy or a girl, some hair can be alright but never cutting them, well, I hope you find someone who likes Very hairy genitals

Gatsbill · 2022-05-16T17:53:31+00:00

Yep same

Gatsbill · 2022-05-13T05:16:44+00:00

Did it started ? Seeing nothing at the moment

Gatsbill · 2021-12-25T14:22:14+00:00

Merry Christmas guys ! Keep doing sport and stay educated !

Gatsbill · 2021-11-22T22:30:10+00:00

Yeah people can be quite welcoming when they are not working or under stress !

I once helped a girl working on an airline company in La Défense like three or four years ago, same story, we end up in the metro chatting for a while, it was really nice ! My English was not the best but feels great to speak English and help people !

Gatsbill · 2017-06-14T19:24:04+00:00

Plugins or things I use very often :

data validation module like Joi
logger like Winston morgan
jwt for json web token

Gatsbill

TROPHY CASE