AI BriefingHow to Improve CI Time by Up to 4.6x
Key point
By adopting pnpm and turborepo, CI time in a monorepo environment was reduced by up to 79%.
Details
As the project grew in scale and the number of packages increased, we faced a problem where CI (Continuous Integration) time surged. The initial time of around 4 minutes increased to 12 minutes as the number of packages grew to 9.
To solve this, we first replaced the package manager from yarn to pnpm. pnpm utilizes symlinks to reference the global cache path (.pnpm-store), reducing unnecessary file copying and optimizing disk I/O. This shortened dependency installation time by about 60 seconds.
We also introduced turborepo as a monorepo management tool. turborepo maximizes build efficiency through the following key features:
- Incremental Builds: Build only what has changed
- Content-aware hashing: Cache management through content-based hashing
- Parallel execution: Parallel execution of tasks
- Remote Caching: Utilizing remote cache
Through these optimizations, we were able to improve CI time by up to 79% when dependency and build cache hits occur.
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