WASI Proposals Support
The following table summarizes Wasmtime's support for WASI proposals. If a proposal is not listed, then it is not supported by Wasmtime.
| WASI Proposal | Supported in Wasmtime? | Enabled by default? | CLI Flag Name 1 |
|---|---|---|---|
| I/O | Yes | Yes | wasi-common |
| Filesystem | Yes | Yes | wasi-common |
| Clocks | Yes | Yes | wasi-common |
| Random | Yes | Yes | wasi-common |
| Poll | Yes | Yes | wasi-common |
| Machine Learning (wasi-nn) | Yes | No | experimental-wasi-nn |
| Blob Store | No | No | N/A |
| Crypto | Yes 2 | No | experimental-wasi-crypto |
| Distributed Lock Service | No | No | N/A |
| gRPC | No | No | N/A |
| HTTP | No | No | N/A |
| Key-value Store | No | No | N/A |
| Message Queue | No | No | N/A |
| Parallel | No (see #4949) | No | N/A |
| Pub/sub | No | No | N/A |
| Runtime Config | No | No | N/A |
| Sockets | No | No | N/A |
| SQL | No | No | N/A |
| Threads | Yes | No | experimental-wasi-threads |
1
The CLI flag name refers to to the --wasi-modules argument of the
wasmtime executable; e.g., --wasi-modules=wasi-crypto. See wasmtime run --help for more information on the flag's default value and configuration.
2: Build Wasmtime with --features=wasi-crypto to enable this.