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Go has no native support for aio. Based on this thread, Goroutines seem to do the same thing, via epolls. https://groups.google.com/forum/#!topic/golang-nuts/AQ8JOHxm...

I think the best bet is to build a fio equivalent in Go (shouldn't take more than a couple of hours), and see if it can achieve the same throughput as fio itself. That can help figure out how slow is Go compared to using libaio directly via C.

While Network socket in Go are using epolls automatically, file are not. From looking at Badger code for example: fd.ReadAt(buf, offset) would block.

See this issue: https://github.com/golang/go/issues/6817

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