Is anyone else using an incredible amount of hacks and workarounds in their K/JS project? :sweat_smi...

# javascript

[Marc Knaup]

Is anyone else using an incredible amount of hacks and workarounds in their K/JS project? 😅

[Robert Jaros]

I would say the only real hacks I use in KVision are the ones related to the difference between legacy and IR backends.

[Marc Knaup]

I see. I’ve dropped all support for legacy. Enough to care about with IR already 😅

[Robert Jaros]

I like to work in dev mode with legacy, because it's very fast compared to the IR.

[Marc Knaup]

Yeah would love that too. Update cycle is up to 1 minute for me which is super annoying.
But I cannot use legacy in my actual web front-end as it lacks some IR functionality.

[Sean Keane]

What do you feel you're lacking specifically?

I'm currently getting 4-7 second build times. I'm not sure what your spec is but generally I found giving more VM memory to intellij gives it a faster build and smoother response time.

This has seemed to solve the issues on the M1 Mac and x86 machines. 4gb seems to help massively on both.

https://www.jetbrains.com/help/idea/increasing-memory-heap.html

I've found that with 1.5.0-RC the compile time has dropped a few seconds more. 1 minute should not be the case.

What gradle version are you currently using. I'm running 7.0 on my setup and this has seemed to help also.

If you like you could try also turning on build in parallel in your gradle.properties file.

org.gradle.parallel=true

If you're building in different modules this should help.

[Marc Knaup]

My MacBook Pro is mid-2018 and the IDE has 24GB available. Gradle 6.8 has 8GB limit.

I cannot use Kotlin 1.5.0-RC because not all Kotlin libraries are compatible yet.

Gradle parallel doesn’t make any difference.
And I had to disable incremental builds due to a compiler or tooling bug.

How large is your project?

[andylamax]

Using Kotlin/JS IR and i have arround 12 seconds build times, 16-20 seconds for page reload. IR has gotten so much better since 1.4.20 based on my experience

[Marc Knaup]

Did you have to disable incremental compilation?

[andylamax]

Haven't done anything than change the output filename, and enabled cssSupport

[Sean Keane]

Was it this bug https://youtrack.jetbrains.com/issue/KT-46283

[Marc Knaup]

@Sean Keane
https://youtrack.jetbrains.com/issue/KT-44718

Same I guess

[Sean Keane]

The project is 3 multiplatform modules with buildSrc for deps management.

I think you should try turning on incremental builds. This will stop you recompiling everything each time.

[Marc Knaup]

I can’t due to that issue…

[christophsturm]

what libraries do not yet work with 1.5?

[Sean Keane]

@Marc Knaup Have you tried Inc Comp with 1.4.32?

Also, can you list the libs you're having issues with? I can check on my end to see if its similar on my setup.

[Marc Knaup]

The incremental compilation issue is only fixed in 1.5.

[Marc Knaup]

I wasn't able use kotlinx-datetime and kotlinx-coroutines because of changes in the Duration inline class.

[christophsturm]

its unfortunate that theres no coroutines beta for 1.5

[Sean Keane]

I've been using 1.4.3-native-mt

This is my lib list:

const val kotlinReact = "17.0.2-pre.153-kotlin-1.4.32"
    const val kotlinStyled = "5.2.3-pre.153-kotlin-1.4.32"
    const val routerDom = "5.2.0-pre.153-kotlin-1.4.32"
    const val kotlin = "1.5.0-RC"
    const val ktor = "1.5.2"
    const val coroutinesCore = "1.4.3-native-mt"
    const val coroutinesTest = "1.4.3"
    const val serializationCommon = "1.1.0"

Are you on the latest DateTime? A new release is out on the 27th April.
https://search.maven.org/search?q=a:kotlinx-datetime

[Marc Knaup]

I’ve replaced the Kotlin react/styled/router libs with my own, so no issues here.

Coroutines doesn’t work with Kotlin 1.5 if you’re using Duration anywhere. And I do a lot.

[Sean Keane]

Have you a small example of this?

[Marc Knaup]

No.
Simply any function that takes or returns Duration, like delay.

[Sean Keane]

Ok, I'll give it a go with kotlinx-datetime and see if I can replicate on my side.

[Marc Knaup]

I’ll simply wait for Kotlin 1.5 release.
Shouldn’t take too long before it’s released along with coroutines update.

[russhwolf]

kotlinx.coroutines 1.5.0-RC has been released which is built against Kotlin 1.5.0, if you want to try it out early

[Marc Knaup]

Good to know 🙂
We’re very close to launch now, so I won’t dare making everything explode now 😁

After the launch I’ll tackle that upgrade again.