We have a repository with large number of branches and tags and webhooks enabled.
On every event in this repository, Jenkins is checking all the branches and tags - which takes significant time - a few minutes for single job. Because the number of thread which can process webhooks is limited, sometimes we experience long queues and delays between webhooks is sent and a new build is triggered.

I've checked different jobs configurations and I found that

• The problem occurs when Discover tags is trait is configured
• Huge number of branches is checked much faster than huge number of tags
• Tags are always checked, regardless which type of event triggered webhook
• All tags are always checked - no matter if they match Filter by name pattern