Integrating Amazon ECR as a remote cache for AWS CodeBuild can significantly reduce Docker image build times by providing a reliable long-term storage solution for build caches. This method allows for the reuse of cached layers across builds, enhancing efficiency in the development process. The article outlines the implementation steps and prerequisites for setting up this caching mechanism.

Amazon Elastic Container Registry (ECR) has increased its support limit from 20,000 to 100,000 images per repository, accommodating growing needs and reducing the frequency of limit increase requests. This update is effective across all AWS commercial and GovCloud (US) Regions and is automatically applied to existing registries.