ashb opened a new pull request #12931:
URL: https://github.com/apache/airflow/pull/12931
While looking at the build logs for something else I noticed this
oddity at the end of the CI logs:
```
Tue, 08 Dec 2020 21:20:19 GMT Step 125/135 : LABEL
org.apache.airflow.distro="debian"
...
Tue, 08 Dec 2020 21:21:14 GMT Step 133/135 : LABEL
org.apache.airflow.commitSha=${COMMIT_SHA}
Tue, 08 Dec 2020 21:21:14 GMT ---> Running in 1241a5f6cdb7
Tue, 08 Dec 2020 21:21:21 GMT Removing intermediate container 1241a5f6cdb7
```
Applying all the labels took 1m2s! Hopefully applying these in a single
layer/command should speed things up.
A less extreme example still took 43s
```
Tue, 08 Dec 2020 20:44:40 GMT Step 125/135 : LABEL
org.apache.airflow.distro="debian"
...
Tue, 08 Dec 2020 20:45:18 GMT Step 133/135 : LABEL
org.apache.airflow.commitSha=${COMMIT_SHA}
Tue, 08 Dec 2020 20:45:18 GMT ---> Running in dc601207dbcb
Tue, 08 Dec 2020 20:45:23 GMT Removing intermediate container dc601207dbcb
Tue, 08 Dec 2020 20:45:23 GMT ---> 5aae5dd0f702
```
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