During times of high activity in the repo, the scheduling of Cirrus CI tasks might put them a few hours in the future. This is fine when all the tasks eventually pass. Though for failing tasks, a failure should ideally be shown to the author and reviewer as soon as possible.
Compute credits can be used to schedule immediately: https://cirrus-ci.org/pricing/#compute-credits. Running all tasks with compute credits will probably be more expensive than our previous CI invoice. However, they are also more flexible.
As a start we could enable only a single task and revisit/re-evaluate the next steps in a month.
