As Wix Backend grew exponentially with more than 800 micro-services, our previous CI solution has been slowing us down. We decided to switch to the Bazel build tool and Google Cloud Build CI platform. The migration and adaptation was challenging and some promising directions had to be abandoned. The end result was a dramatic improvement in performance and accuracy.

What makes bazel stand out as such a fast build tool? Is the migration to it hard? What are the pain points? Come and find out from our experience.