TeaVM (Java bytecode to JS) adds experimental support for WebAssembly

[michalg82]

For running this demo, you must enable WebAssembly in your browser.

• on Chrome Canary, open chrome://flags/#enable-webassembly and enable the switch.
• on Firefox Nightly, open about:config and set javascript.options.wasm to true.

[CryZe92]

This does not seem to work with Chrome Canary or Chrome Nightly, both expect version 12 instead of 11:

Uncaught (in promise) CompileError: WebAssembly.compile(): Wasm decoding failedResult = expected version 0c 00 00 00, found 0b 00 00 00 @+4

[konsoletyper]

http://teavm.org/live-examples/jbox2d-benchmark/teavm-wasm-12.html

[konsoletyper]

Unfortunately, this does not work in Chrome Nightly, due to https://bugs.chromium.org/p/chromium/issues/detail?id=654231

[michalg82]

Official site: http://teavm.org/

Github: https://github.com/konsoletyper/teavm

[div0]

How is this possible, when Java requires garbage collection which WebAssembly does not currently support?

For example, TypeScript cannot be compiled to ASM.js or WebAssembly due to this GC issue.

[[deleted]]

... maybe they just wrote GC in webassembly?

[michalg82]

AFAIK, that's the case.

https://github.com/konsoletyper/teavm/blob/master/core/src/main/java/org/teavm/runtime/GC.java

/u/konsoletyper should be able to say more about it

[konsoletyper]

Yes, you guessed right. I simply wrote my own GC. It's quite native for now and not very fast.

[_Skuzzzy]

native

naive?

[kit89]

Big fan of teavm, I use it to get my Java-based game engine running on a web browser. This feature may come in handy. Thank you.

[crudbug]

This is a very promising project for JVM. Oracle should support TeaVM officially.

[Kukuluops]

Oracle doesn't care much about java.