State of Loom

[Rob Nikander]

Hi,

I read the State of Loom article and it sounds great. I’m wondering if it is going to be flat-out better than async/await or if there are tradeoffs. If all Java functions are going to be compiled to deal with this more dynamic “stack”, to avoid the two-colored world, does that mean that all Java functions (even those that don’t use async) will pay some performance penalty? 

I’m wondering if there is any reason to have colored functions in other languages, or if they should copy/steal this technique as well. :) Maybe it requires a VM/JIT/GC to work well. 

Rob

On 2020-05-15 16:55, Ron Pressler wrote:
> Hello.
> 
> I’ve posted a document describing the project’s goals and current progress:
> 
>     http://cr.openjdk.java.net/~rpressler/loom/loom/sol1_part1.html
> 
> It is accompanied by a new EA build, based on jdk-15+21.
> 
>     http://jdk.java.net/loom/
> 
> The new continuations algorithm is now switched on by default, so if you haven’t
> explicitly turned it on before, you may see some performance improvements.
> You can switch it off with -XX:-UseContinuationChunks.
> 
> — Ron
> 
> 
>