add post about github actions evaluation

Author: pietroalbini

posts/inside-rust/2019-11-14-evaluating-github-actions.md

@@ -0,0 +1,28 @@
+---
+layout: post
+title: Evaluating GitHub Actions
+author: Pietro Albini
+team: the infrastructure team <https://www.rust-lang.org/governance/teams/operations#infra>
+---
+
+The Rust Infrastructure team is happy to announce that we’re starting an
+evaluation of [GitHub Actions](https://github.com/features/actions) as a
+replacement for Azure Pipelines as the CI provider of the
+[rust-lang/rust](https://github.com/rust-lang/rust) repository.
+
+We’ve been part of the beta of GitHub Actions since the beginning, following
+its development closely and testing it on a lot of smaller repositories in our
+organization, and we’re really satisfied so far with the product. GitHub
+Actions provides most of the features we love about Azure Pipelines, while
+being integrated with GitHub’s UI, permissions and workflows.
+
+GitHub has also offered to sponsor a dedicated pool of builders with increased
+resources. Our extensive but time-consuming CI is one of the major pain points
+for compiler contributors, and the additional resources have the potential to
+drastically improve our developers’ experience. We have achieved 60% faster
+builds in preliminary testing thanks to the increased core count in the
+dedicated builder pool, and there is still large room to parallelize and finish
+builds even faster.
+
+Our plan is to start running GitHub Actions in parallel with Azure Pipelines in
+the next few weeks, and we’ll keep the community updated as we learn more.