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Most likely a Windows or MacOS user, where docker runs in a linux VM. Optimized as much as possible and lightweight, but still a VM.

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No, on Windows it is very quick too. On WSL2 compiling Rust programs are almost as fast as Linux on bare metal. However the files need to live inside the Linux filesystem. Sharing with Windows drives actually compiles slower than native Windows.

You can use dev drives instead, I guess.

If you are building natively, yes. However the original comment is about Dev Containers which runs under WSL2.

If you open a native Windows folder in VSCode and activate the Dev Container, it will use the special drvfs mounts that communicate via Plan9 to host Windows OS to access native Windows files from the Docker distro. Since it is a network layer accross two kernels, it is slow as hell.

Windows is a bit "yes but" kind of situation.

First of all it supports containers natively, Windows own ones, and Linux on WSL.

Secondly, because Microsoft did not want to invent their own thing, the OS APIs are exposed the same way as Docker daemon would expect them.

Finally, with the goal to improving Kubernetes support and the ongoing changes for container runtimes in the industry, nowadays it exposes several touch points.

https://learn.microsoft.com/en-us/virtualization/windowscont...

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