Finished a 6-week GitHub Actions + Argo CD workshop and cut our commit-to-prod from about 42 minutes to 12, with noticeably fewer hotfix rollbacks. What training, certs, or workshops moved your deployment throughput or DORA metrics this year — i’m planning Q2 learning and want picks that translate directly to pipeline efficiency.
Did a short GitHub Actions deep dive and focused on perf — ‘cache everything sensible’ plus matrix test sharding cut our CI from about 26m to about 9m; actions/cache for npm and Docker layer caching per branch were the wins (docs: Dependency caching reference - GitHub Docs). Caveat: keep cache keys tight or you’ll chase ghosts, and if you’re already on Argo CD, a quick Argo Rollouts canary module trimmed our hotfix rate like pumping the tires before a ride.
Argo Rollouts lab + GitHub Actions reusable workflows cut our commit‑to‑prod 28→11m; ‘analysis’ gates reduced rollbacks — needs solid SLOs. https://argo-rollouts.readthedocs.io.