Render blame info in the Source Viewer (fallback viewers) - follow up improve performance (#439032) · Issues · GitLab.org / GitLab · GitLab

Render blame info in the Source Viewer (fallback viewers) - follow up improve performance

### Summary In https://gitlab.com/gitlab-org/gitlab/-/issues/439032 we added the ability to render blame information in the Simple Viewer. This issue is created to optimise performance - we need to add intersection observer to every 70 lines of legacy viewer.

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