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by syockit 203 days ago
The best thing about gccgo is that it is not burdened with the weirdness of golang's calling convention, so the FFI overhead is basically the same as calling an extern function from C/C++. Take a look at [0] and see how bad golang's cgo calling latency compare to C. gccgo is not listed there but from my own testing it's the same as C/C++.

[0]: https://github.com/dyu/ffi-overhead
2 comments
MangoToupe 202 days ago
> The best thing about gccgo is that it is not burdened with the weirdness of golang's calling convention

Interesting. I saw go breaking from the c abi as the primary reason to use it; otherwise you might as well use java or rust.

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wahern 203 days ago
Isn't that horribly out of date? More recent benchmarks elsewhere performed after some Go improvements show Go's C FFI having drastically lower overheard, by at least an order of magnitude, IIUC.
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