feat: Speed up integration tests (nodes)

[sjrl]

Related Issues

• No open issue

Proposed Changes:

• Changed summarizer model to a smaller one (2GB to 500MB) to save on space and speed up the tests. Looking at the CI for integration-tests-linux(nodes) it looks like this change results in a large speedup (e.g. Run Tests goes from ~20min to ~8 min). Or another way to look at it is that the summarizer had 7/10 of the slowest tests before and now 0/10.

How did you test it?

Updated affected CI tests.

Notes for the reviewer

I noticed that the integration tests for nodes were taking awhile and I found that we could achieve an easy win in speedup by swapping out the model used for summarization.

Checklist

• I have read the contributors guidelines and the code of conduct
• I have updated the related issue with new insights and changes
• I added tests that demonstrate the correct behavior of the change
• I've used the conventional commit convention for my PR title
• I documented my code
• I ran pre-commit hooks and fixed any issue

[sjrl]

Hey, @masci this PR is ready and I would appreciate a review when you have the chance 🙂

[masci]

This is great, thanks!

Can you remove the caching for google/pegasus-xsum here? https://github.com/deepset-ai/haystack/blob/main/.github/workflows/tests.yml#L690?

[sjrl]

@masci You're welcome! And definitely, I have removed the pegasus model from caching and I reactivated a test that wasn't run because its name did not follow pytest conventions.

[masci]

LGTM, good catch with the test name!