How Go's io.Copy Uses sendfile and splice for Zero-Copy Data Transfer

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A technical blog post on segflow.github.io explores zero-copy mechanisms in the Go programming language. The article examines how Go's standard io.Copy function leverages Linux system calls such as sendfile and splice to transfer data efficiently. These zero-copy techniques allow data to move between file descriptors without passing through user space, reducing CPU overhead and memory usage. The post breaks down the performance implications and hidden costs associated with using io.Copy in different contexts. It serves as a deep dive for Go developers seeking to understand low-level I/O optimization in their applications.

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