Docker images are constructed of layers, with each instruction in the Dockerfile generating a new layer that tracks changes. This effective use of layering allows for faster builds by reusing unchanged layers, reducing overall recompilation time. Additionally, the use of the .dockerignore file helps in streamlining builds by excluding unnecessary files and directories from being added to the build context. Comprehending these principles, including effective use of the RUN command, can lead to the creation of smaller and more efficient Docker images.
Docker images consist of layers that store specific changes, allowing efficient reuse of those layers during builds and minimizing the need for recompilations whenever possible.
Understanding the Docker caching mechanism can significantly improve build times by preventing unnecessary recompilation of unchanged layers, thus making Docker builds much faster.
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