CircleCI emphasizes the importance of regularly reviewing and updating configuration files to optimize continuous integration pipelines, as small changes can significantly reduce workflow duration. The DevOps Customer Engineering (DCE) team at CircleCI assists customers with support plans by providing configuration file reviews, drawing on experience from reviewing hundreds of files to create a process applicable to any project. A configuration review involves analyzing a project’s configuration file to ensure optimal pipeline performance against metric goals. Key steps include choosing a project to focus on, setting goals, gathering baseline metrics using CircleCI’s Insights tool, and systematically reviewing workflows, jobs, and customized logic like orbs and executors. The process also encourages documenting findings and changes to build a CI knowledge library for future reviews. CircleCI provides resources and tools, including the Insights dashboard and API, to facilitate this process, and offers Value Added Services through DCEs for teams seeking professional assistance with configuration reviews and other CI-related tasks.