Difference between multiple queues and using priority on a single queue

[leetice]

Curious, is there any functional difference in defining two queues (e.g. urgent & default) and sorting PRs onto them accordingly, as opposed to having a single queue (default) and assigning different priorities for PRs accordingly (e.g. high & low)?

Thanks!

[jd]

Hi @leetice!

The main difference is that jobs running into your default queue will get interrupted when a PR enters the urgent queue.
This is not true when using a single queue with priority inside the queue: the ongoing PR being tested will not be interrupted.

(Using multiple queues also allows you to have differents settings (spec checks, batches, etc))

[leetice]

Thank you, Julien! That's extremely helpful, and thanks also for the quick response!