It seems that the bundle size has increased a bit ...

# kobweb

[Ahmed Riyadh]

It seems that the bundle size has increased a bit after upgrading from 0.19.0 to 0.19.1 (and Kotlin from 2.0.10 to 2.0.20)

Before: 3,384,171 bytes (3.5 MB on disk)
After: 3,587,072 bytes (3.7 MB on disk)

The compiler target is already es2015 for both. No dependencies except Kobweb and Compose HTML Core/Runtime.

Nothing has changed except the version for kobweb and kotlin

[Ahmed Riyadh]

While the assets on this site took most of the space, the same issue also happened on the example site. (I haven't changed them in this change)

[David Herman]

I heard there was a downgrade for the es2015 target for people accompanyhing the Kotlin 2.0.20 release unfortunately. But I think the non es2015 target wasn't as affected?

[David Herman]

Note that changing the kotlin version is a pretty significant change. It's more than just the language / compiler, it also affects the version of the Kotlin multiplatform plugin and all of the dependencies (like Compose artifacts) that it bundles.

[Edoardo Luppi]

Could you try switching back to languageVersion KOTLIN_1_9? That goes back to compiling with K1. I'm curious to see if that restores the previous output size.

[Ahmed Riyadh]

The bundle size is about 4.2 MB for non es2015 target with latest version of kotlin

[Ahmed Riyadh]

Actually it did restore the previous output size when switching to older version of Kotlin and Kobweb.

[Edoardo Luppi]

Did you try setting the language version, or did you rollback the dependency itself?

[Ahmed Riyadh]

I haven't tried using Kotlin 1.9 with Kobweb 0.19.0, the issue with Kotlin itself, most people saw decrease in the bundle size after using Kotlin 2.0.10, not sure why I'm the only one who saw the opposite, even when using the default app template so it's not a project configuration issue

[Edoardo Luppi]

I didn't want you to downgrade the dependency version, just the language version via compiler options

[Ahmed Riyadh]

By dependency version, do you mean Kotlin?

[Edoardo Luppi]

Yes. Keep using 2.0.20 and latest Kobweb.
But set the language version to 1.9

[Ahmed Riyadh]

I will try ASAP

[Edoardo Luppi]

The K2 JS IR seem to have multiple issues.
Just a word of caution, and I'm curious to check how @David Herman does it, but on K2 debugging is completely off on Windows.

[Edoardo Luppi]

Probably David is on Linux or macOS

[Edoardo Luppi]

https://youtrack.jetbrains.com/issue/KT-66125/

[Ahmed Riyadh]

I'm on macOS and also tried it with Linux (haven't saw the bundle size though).

[David Herman]

Just a word of caution, and I'm curious to check how @David Herman does it, but on K2 debugging is completely off on Windows.

Ah yeah I'm not debugging stuff personally. I mostly use println plus live relading for my developer workflow.

[David Herman]

I had no idea about the source maps issue, thanks for putting it on my radar.