Question

A SaaS company runs a CI/CD pipeline in AWS CodePipeline with a CodeBuild stage that compiles a large monorepo, downloads hundreds of npm and Maven dependencies on every run, and executes a test suite. The build stage now takes 45 minutes, and developers complain that feedback is too slow, delaying releases. Cost is a secondary concern, but the team wants to reduce build duration with minimal changes to the pipeline structure. Which combination of changes will MOST effectively reduce build time?

Accepted Answer

Enable CodeBuild local caching (custom/source/docker layer caches) or S3 dependency caching, and split independent test suites into parallel CodeBuild actions within the same pipeline stage.

Answer

Migrate the CodeBuild project to a smaller compute type to save cost, and add a CloudWatch alarm that notifies the team when builds exceed 45 minutes.

Answer

Replace CodePipeline with a nightly EventBridge-scheduled batch build so all compilation happens once per day outside working hours.

Answer

Move the entire build to a single large EC2 instance managed by an Auto Scaling group and run the pipeline commands via SSM Run Command.