February 14, 2025

Enhancing CI Speed in Elixir Projects

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Enhancing CI Speed in Elixir Projects

Source: ftes.de

This article focuses on optimizing Continuous Integration (CI) processes for an Elixir project to enhance developer productivity by reducing the time spent in CI pipelines. Key strategies included combining CI jobs to reduce overhead, upgrading to larger GitHub-hosted runners, and employing selective feature testing to run only necessary tests based on updates. Furthermore, leveraging ExUnit's concurrency features, such as marking tests as async and utilizing concurrency groups, helped optimize test execution. Addressing flaky tests and optimizing slow tests were also emphasized. Overall, these improvements led to a considerable decrease in CI duration while maintaining cost-effectiveness.

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