Is it normal for the Compose preview to take aroun...

# compose

[zak.taccardi]

Is it normal for the Compose preview to take around a minute or more to render? Is that normal?

The associated gradle build completes in 6 seconds

[Landry Norris]

How complex is the preview? Are you passing in any ViewModel or other code that’s running, or is it just a dumb view?

[Landry Norris]

May also want to check for LaunchedEffects or similar.

[zak.taccardi]

it’s a dumb view

[zak.taccardi]

relatively simple, just stepping into @Compose

[Landry Norris]

What Android Studio version and AGP version in root level build.gradle?

[zak.taccardi]

giraffe 4/ agp 7.4.1

[Landry Norris]

Have you tried latest stable Eel?

[zak.taccardi]

not yet. would you say that taking a minute + is abnormal, given the gradle build is so fast?

[Landry Norris]

I’d imagine. My previews are pretty quick, but it could also be device. I’m on a specced out macbook pro with M1.

[zak.taccardi]

same

[Landry Norris]

I’d possibly try out Eel and file a bug report if it’s slow too.

[Landry Norris]

To clarify: is this just when booting up, or every time you refresh the render? Is Live preview on?

[zak.taccardi]

I have live preview off bc I was noticing poor performance in the IDE for typing when I had it on

I assume this is the control for live updates

[Landry Norris]

Yes. I’d expect it to take a while to render the first time, but not after that.

[eygraber]

Rendering happens very quickly for me in Flamingo

[agrosner]

same issue in giraffe, on large project with many modules (200+) for private previews in smaller independent modules. takes over a minute, longer than the actual app compile from cache with configuration cache.

[agrosner]

compose 1.3.3, compiler 1.4.0, etc

[zak.taccardi]

@agrosner does it only happen for you in Giraffe?

[zak.taccardi]

have you tried it in flamingo or electric eel?

[agrosner]

its been happening for every version in past 6+ months, i figure it may not be fully optimized for large projects

[agrosner]

it doesnt seem to use same build mechanisms like gradle to render (at least visibly) so its not clear how it caches information and how we can speed it up

[eygraber]

My project has 150+ modules, but only a handful of them have previews.

[agrosner]

same. not many.

[agrosner]

live edit is much faster and more efficient on a demo page than previewing

[agrosner]

(when it works)

[Mark]

I noticed a big speed improvement for Preview with Patch 1 of AS Eel