[microtherion]

That stood out to me as well. Any insights why sqinn and zombie underperform in this case, and is the problem inherent to their design?

[cvilsmeier]

For sqinn it's because of its design: Shuffling that much data over process boundaries takes time. For zombie, more pprof would be needed to explain the behaviour.

[ncruces]

I would suspect some unnecessary copying. Nothing else explains a “lower level” binding (zombie) performing worse than modernc.

My (WASM) binding also has a lower level API. But I worked hard to make database/sql work first class, so I wouldn't expect much improvement.