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#GraalVM 25 is out! 🚀 Exciting updates for #GraalPy, #GraalJS, and #GraalWasm — plus our first preview of #WebAssembly compilation!

GraalVM@graalvm.org

GraalVM 25 is here, with lots of updates for native compilation, GraalPy, GraalJS, and WebAssembly. Faster and better than ever!🐰🚀 Download: www.graalvm.org/downloads/ Release notes: www.graalvm.org/release-note...

16/9/25, 4:37 pm9 reposts33 likes

zalim (kotlin wasm compiler webassembly VM)

@bashorov.com

17 Sept 2025

Any updates re Wasm support in Native Image?

Fabio Niephaus

@fniephaus.com

17 Sept 2025

The preview of the JavaScript interoperability API for GraalVM Web Image is now available on Maven Central: central.sonatype.com/artifact/org... This release also includes various fixes, though support for the component model, threading, and more still needs work. Contributions are welcome! 🙂

central.sonatype.comMaven Central: org.graalvm.sdk:webimage-previewDiscover webimage-preview in the org.graalvm.sdk namespace. Explore metadata, contributors, the Maven POM file, and more.

michaelpaus.bsky.social

@michaelpaus.bsky.social

17 Sept 2025

Thanks, that answers my previous question in the Slack channel.

A. H. Zakai

@kripken.com

16 Sept 2025

Nice! I'm curious if there are recent performance numbers for GraalWasm anywhere?

Fabio Niephaus

@fniephaus.com

16 Sept 2025

Not yet. We've been benchmarking against use cases we find interesting, but I'm not sure how representative they are. What numbers would you be interested in? Can you recommend a benchmark suite for WebAssembly runtimes?

A. H. Zakai

@kripken.com

16 Sept 2025

I'm just generally curious about how performance compares to other VMs. Maybe specifically about how much benefit there is from the Graal infrastructure (e.g. not many wasm VMs do runtime inlining atm, but maybe GraalWasm can?) +

A. H. Zakai

@kripken.com

16 Sept 2025

For benchmarks, if you have JS support as well, the Emscripten (emscripten.org/docs/getting...) and Kotlin (github.com/Kotlin/kotli...) benchmark suites are interesting I think. Maybe you can run them with GraalJS? (I'm less familiar with benchmarking outside of the Web ecosystem/without JS)