roee88 edited a comment on issue #177: URL: https://github.com/apache/arrow-datafusion/issues/177#issuecomment-963761947
@seddonm1 compile and run? I have experimented with that yesterday. I tried wasm32-wasi first and a simple sample works in single threaded mode after disabling some parquet features. See this gist for the example: https://gist.github.com/roee88/91f2b67c3e180fa0dfb688ba8d923dae For wasm32-unknown-unknown adding getrandom with js as a dependency of the sample makes it compile IIRC, but actually running it is a different story. I tried to get a sample working with wasm-pack and it stops execution on the datafusion context creation, I suspect that it uses some sync primitives that are unsupported in wasm32-unknown-unknown but I didn't investigate further. I didn't try wasm32-unknown-emscripten yet since my local rust version is incompatible with my installed emcc version (both latest at the time of this writing). Edit: re tokio, the sample above worked on wasm32-wasi with other executors in single threaded mode including futures 0.3, https://github.com/richardanaya/executor, and async-global-executor. As long as you don't hit code paths that use things like tokio::spawn (used in hash aggregate) it might be fine. I'm not sure what's the best approach for library code that needs to spawn tasks. I have seen opinions for 1) a library should never spawn, 2) futures should be universally supported, 3) a library should accept an executor trait (as implemented in https://github.com/najamelan/async_executors). I didn't check the state of futures and WebAssembly recently. I didn't try wasmbindgen-futures because it's officially no longer compatible with wasi and emscripten and as I said I couldn't get anything running with wasm32-unknown-unknown. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
