Performance regression while scanning Ruby code

[deivid-rodriguez]

I noticed that since (I think) CodeQL 2.13.0, our action to analyze Ruby code is taking much longer.

Here's a 3 minutes run using 2.12.6: https://github.com/dependabot/dependabot-core/actions/runs/4768651225/jobs/8478202528.

Vs a 35 minutes run using 2.13.0: https://github.com/dependabot/dependabot-core/actions/runs/4768852196/jobs/8478637429.

After pinning back to https://github.com/github/codeql-action/releases/download/codeql-bundle-20230418/codeql-bundle.tar.gz (bundling 2.12.7) at dependabot/dependabot-core#7275, it's fast again.

Not sure if this could be related to #12349, but that one seems older, so I went with a separate ticket. I also posted a comment at #13028, in case the fix could help here.

Thanks!

[aibaars]

Thanks for reporting. We're looking into this!

[aeisenberg]

We've identified the culprit and are working on a fix. Assigning to @erik-krogh who is doing the work.

[deivid-rodriguez]

I just verified that this is fast again in the latest version, thanks so much for fixing it!