Episode Details

This story was originally published on HackerNoon at: https://hackernoon.com/terragrunt-parallel-apply-in-github-actions-27-faster.
How inDrive used dependency graphs and GitHub Actions for Terragrunt parallel apply, achieving 2.7× aggregate speedup over an estimated serial baseline.
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At inDrive, we replaced order.txt with a validated dependency graph and parallel Terragrunt jobs in GitHub Actions. Across 355 rollouts, parallel apply took 64 hours versus an estimated 171 hours for serial execution—a 2.7× aggregate speedup. Small PRs often ran slower, so serial apply remains the default.