Efficient pipelines in GitLab CI/CD: Parallel Matrix Builds + !reference

Today I was diving deeper into GitLab CI/CD Pipeline Efficiency tricks, after I discovered resuable job attributes with !reference [https://dnsmichi.at/2021/09/17/reusable-job-attributes-in-other-jobs-in-gitlab-ci-cd-with-reference/] last week. Resource optimization is a big topic, and next to ideas on failing fast, I was looking into more parallelization. Luckily GitLab…