←back to thread

Five years of React Native at Shopify

(shopify.engineering)
324 points onnnon | 1 comments | 13 Jan 25 22:08 UTC | HN request time: 0s | source
Show context
zffr ◴[16 Jan 25 19:48 UTC] No.42729978[source]▶
> Our apps are blazing fast (<500ms screen loads)

I’m not sure I would consider 0.5 seconds to be blazing fast.

I wish the article went into detail on what these screens do and what a screen load means exactly.

replies(3): >>42730261 #>>42730281 #>>42732043 #
buzzerbetrayed ◴[16 Jan 25 20:12 UTC] No.42730281[source]▶
That was my initial thought as well. Anyone know what native screen loads typically are? I’m sure it varies wildly between apps, but 500ms seems like it would be on the slower end of a “fast” app.
replies(4): >>42731139 #>>42731144 #>>42733031 #>>42733188 #
1. zffr ◴[16 Jan 25 21:30 UTC] No.42731144[source]▶
It really depends on what a "screen load" means exactly. If its just rendering the screen from some client-side data then I would expect something <16ms. To support 120fps displays, it would need to be <8ms.

If a "screen load" includes making a network request to fetch data, then this is a very weird metric to include in a post about React Native. Most of that time budget should just be waiting for the request to complete. Just as before, it should take <16ms to render the screen once the data arrives.