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Docker Buildkit has a new `COPY --link` feature.

With --link enabled, files added with COPY won't be copied to the previous layer, but a new layer will be created. This can help you to better cache specific things and accelerate your Docker builds.

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How-To Geek How to Accelerate Docker Builds and Optimize Caching With “COPY –link” COPY --link is a new BuildKit feature which could substantially accelerate your Docker image builds. It works by copying files into independent image layers that don’t rely on the presence of their predecessors. You can add new content to images without the…
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