After recent jenkins & plugins updates we have encountered severe performance issues on blueocean and normal job listings. These issues show as long loadtimes (more than a minute) of the branch lists and blueocean UI and occur on multibranch jobs with many branches (200+) that have issue scanning with the warnings-ng plugin enabled.

I've analyzed memory and allocation profiles of our jenkins controller and it lists getParserId as the main culprit:

This high CPU usage is also accompanied by high memory allocations and gc churn.

(note: images are not necessarily of the same time range)

I've downgraded the warnings-ng plugin to 11.12.0 and analysis-model-api to 12.9.1. This has completely resolved both the cpu usage and memory allocation issues.