The GitHub Actions job "Tests" on airflow.git has failed.
Run started by GitHub user potiuk (triggered by potiuk).

Head commit for run:
39438268fb50ca694d1c76e2224723fe46e33ab0 / Jarek Potiuk <[email protected]>
Optimize startup time for parallel tests

When parallell tests start on CI, they are running parallel docker
compose's and on a clean machine in CI this means that every parallel
test is pulling the images needed to run tests. This means that
backend images are pulled in parallell by all starting parallel runs.

This PR optimizes this step - before running the tests in parallel
we run `docker compose pull` once with the same compose files as
tests - this will pull the necessary images only once.

It should save a few seconds and save a lot of unnecessary traffic
for CI tests - where same image is pulled multiple times - especially
for self-hosted runners of ours where we run 8 docker compose instances
in parallel.

Report URL: https://github.com/apache/airflow/actions/runs/9631476282

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