Answer
BuildKit builds a dependency graph, parallelizes stages, and caches keyed intermediate states.
Quick Answer
BuildKit models a Dockerfile as a DAG (Directed Acyclic Graph) of build steps. Independent steps (multiple COPY from different stages) run in parallel. buildx extends this to run DAG stages on multiple build nodes simultaneously — cross-platform builds run each architecture's stages in parallel, dramatically cutting multi-arch build time.
S
SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ