Any plans to update to the latest vavr version?

[timmattison]

Are you accepting and merging PRs for it? It would be nice to use Vavr 0.10.3 in GWT.

[nfekete]

Hello Tim! Yes, I can review them and have them merged. I haven't used vavr with GWT for a while now (I think since about 0.9.2). How many changes do you see are required to have it working?

[timmattison]

I'm not sure yet. I haven't had time to dig into it. Primarily some tests are broken because Vavr removed some Future methods. I think if those tests were removed it would be pretty close to done.

[timmattison]

I took a shot at updating this and I think I got it working for the most part but one of the things that I noticed, even with version 0.9.2, is that my build time went from 30s to multiple minutes as soon as I included Vavr GWT. Is that normal? Are there any ways to reduce that?

[nfekete]

@timmattison What GWT compiler version were you using? In the current master version of the vavr-gwt module, the declared GWT dependency version is 2.8.2, which is from 2017, so it's quite old. Slow compilation in GWT is usually the result of the Eclipse Compiler for Java (ECJ) embedded by GWT being very slow for code which is heavy on generics, and vavr has some parts — especially the API class —, which is triggering this behavior.

There's a newer GWT version 2.9.0 from 2020, which improves the build time significantly. I just tried to build the 0.9.2 version of vavr-gwt with GWT 2.9.0 and the build time went down from ~100 second to ~30 seconds. Can you try it out in your build?

[timmattison]

I tried again but I was getting builds so long they never finished. Maybe something with my config.

Any chance I could donate to get vavr-gwt updated to the latest vavr version (0.10.3)? I've gotten so used to it I can't live without it. :) And being able to use it in my client code would be incredible.

[timmattison]

I tried again, again today. :P Here's what I ran into...

With the latest version here, 0.9.2, I get an initial build time of 7 minutes and then recompiles are generally fast enough for me to not be bothered by it (~30 seconds).

With my version of 0.10.3 - timmattison@5dbfb92 - I've had it running in the compile-gwt stage for over two hours and it's showing no signs of stopping.

Thoughts?

[nfekete]

@timmattison what are you trying to compile when you get this very long/stuck build? Because the GWT compilation time for vavr + running the test suite is pretty decent for me (the times I listed in my earlier comment), so it might be something to with your project maybe?