Arvados

app/views/pipeline_instances/_show_components_running.html.erb includes the line tasks = JobTask.filter([['job_uuid', 'in', job_uuids]]).results. For jobs that create many tasks, this will take a while to execute. Because this renders automatically as part of showing a pipeline instance, In the worst case, it can take so long that a browser or front-end proxy gives up waiting for Workbench to render a pipeline instance page.

It's important that having many tasks not prevent the page from loading. There are lots of possible solutions; the engineering team can specify one together.