Is it worth it to rewrite ~150 lines of CGO lib_avcodec code to Zig and expose 2 simple methods to (C)Go?

Claude Opus 4.7

Vote: No

For only ~150 lines of CGO code exposing 2 simple methods, the rewrite likely isn't worth it. You'd be adding a new toolchain dependency (Zig), a new build step, and a cross-language FFI boundary that still goes through C ABI anyway — so you don't escape CGO's main cost (the cgo call overhead and build complexity). The supposed benefits (better cross-compilation, cleaner C interop) only really pay off at larger scale or when you're fighting real CGO pain points like complex header parsing or many call sites. At 150 lines and 2 entry points, the existing CGO is almost certainly easier to maintain than introducing a polyglot build. Do it only if it's a learning exercise.

Grok 4.3

Vote: No

Rewriting only 150 lines adds unnecessary complexity by introducing Zig as a new dependency and build step. CGO already handles the lib_avcodec integration adequately for exposing just two simple methods. Maintenance overhead and potential cross-compilation issues outweigh any minor gains in safety or cleanliness for such a small codebase.

GPT-5.5

Vote: No

I’d vote "No" unless you have a concrete problem that Zig clearly solves, such as painful cross-compilation, static linking, memory-safety issues in the wrapper, or a desire to standardize your build around Zig. For only ~150 lines exposing 2 simple methods, the rewrite is unlikely to deliver much functional value. You would still be depending on lib_avcodec’s C ABI, and you may add another language, build step, toolchain dependency, and interop surface to maintain. If the existing CGO code is stable, understandable, and not blocking releases, the cheaper and lower-risk path is to keep it. Rewrite only if the current C/CGO layer is actively causing maintenance, build, or portability pain.

Gemini 3.1 Pro

Vote: No

Adding a completely new language to your tech stack for merely ~150 lines of code introduces an unnecessary maintenance burden. Even though Zig is a fantastic language, integrating it here disproportionately complicates your build process, CI/CD pipelines, and developer onboarding for very little tangible benefit. Furthermore, you will not escape the CGO performance penalty. Go will still need to cross the CGO boundary to call your Zig methods, meaning the context-switch overhead remains exactly the same. You are effectively just swapping a Go-to-C bridge for a Go-to-Zig-to-C bridge. Since `libavcodec` is fundamentally a C library, interacting with it directly through CGO is the most direct and well-documented path. For 150 lines, it is absolutely better to keep your stack simple, rely on standard CGO, and avoid fragmenting the codebase's cognitive load.

Final Summary

The AI Roundtable delivered a unanimous verdict against the rewrite, viewing the introduction of a new language for a mere 150 lines of code as an unnecessary architectural complication. Claude Opus 4.7 and Gemini 3.1 Pro emphasized that since the underlying library is still C-based, the developer would effectively be trading a simple Go-to-C bridge for a more complex Go-to-Zig-to-C bridge with no performance gains. GPT-5.5 and Grok 4.3 rounded out the consensus, arguing that the maintenance burden of a polyglot build system far outweighs any theoretical safety or cleanliness benefits at this small scale.

No agreement after 1 rounds of discussion. Final vote: No: 4

Strongest Arguments

• No: The rewrite offers no escape from the CGO performance penalty; you are simply adding a middleman to the FFI boundary, meaning the context-switch overhead remains identical while your toolchain complexity doubles.