Hi Bernd,

If performance is a concern how about using cfdot?
`cfdot desired-lrps | jq -r '[ .log_guid, .rootfs ] | @tsv`
will give you (instantly):
```
7bc7eef4-121d-4879-bac1-d738c54faa3a    preloaded:cflinuxfs2
2d04940f-ceb1-4884-8cf7-47fd70a0a39c    preloaded:cflinuxfs2
c3c18f43-58df-429d-bb2e-895e621c1a6d    preloaded:cflinuxfs3
5b070c85-85cd-4717-bb59-ce3fd889efad    docker:///xxx/yyy#latest
```
Where the first field is application guid.

Regards,
Stanislav