Go bindgen todos

[Mossaka]

I would like to initiate a new tracking issue to categorize all the necessary steps in improving the Go bindgen experience. These steps will be divided into three categories: short-term, middle-term, and long-term. The duration of each term is not precisely defined at this point, but short-term goals would be tackled immediately after the merge of PR #471 into the main branch. Long-term goals are expected to be completed beyond 2023, while middle-term goals fall somewhere in between.

Short Term

• Go: Enable variants tests #528
• Go: Enable lower-lift-foreign codegen test #589
• Go: implement resource types #615
• Go: Figure out utf16 string conversion from Go to C and vice versa. This will re-enable tests/runtime/string tests
• Go: Use Ns to create local variables to improve readable on the genereated Go code.

Middle Term

• Go: Improve the ergonomics of Go bindings #612
  • Go: ergonomics improvement for Variants type #624
  • Go: ergonomics improvement for Option and Result type #625
  • Go: ergonomics improvement for types, function and package name #626

Long Term

• Go: change the TinyGo runtime to mainline Go compiler once it supports WASI target.
• Go: switch CGo implementation to component model canonical ABI in pure Go implementation #614

[Mossaka]

Performance-wise, I have done some rudimentary benchmark tests on a standard HTTP server that dispatches each HTTP request to a wasm component compiled from Rust and TinyGo. Here is the result:

Rust

TinyGo

You can see that the Rust compiled Wasm component's throughput is three times that of TinyGo. I suspect that the performance difference largely is contributed by the double copy of memory in type conversion between Go and C.

[patrickhuber]

I've done some porting of the python component model MVP to pure go here: https://github.com/patrickhuber/go-wasm/tree/6015b8d07aaa1fc902fee44b01d1ebd6fded3d65/abi

More tests are needed for records, variants etc but strings and basic types are working.

[Mossaka]

@patrickhuber glad to hear! Let me know if you ran into any issues.

[patrickhuber]

I completed the unit tests suite included in the component model MVP. I'm going to try to replace some of the generated code with the go abi I created and see what challenges I run into. Latest here: https://github.com/patrickhuber/go-wasm/tree/main/abi

[Mossaka]

Awesome!! @patrickhuber