Slowness on project sidebar for the projects without board

Issue Summary

The customer noticed below performance issue when they do performance test via Data Center App Performance Toolkit for Jira software.

• Showing project side bar is slow in high load, when there is no board set for the project.

In the method of findFirstRapidViewByProject, it seems all boards search is triggered though no board is set for a project.
https://stash.atlassian.com/projects/JSWSERVER/repos/jira-software-application/browse/[…]/greenhopper/service/rapid/ProjectRapidViewServiceImpl.java

Is it necessary to do all boards search, when board is not yet set for a project? If all boards search is skipped, the performance should be better.

The customer also tested when below plugins are disabled (JSWSERVER-16717) . The slowness was not observed.

• project-sidebar-header-boards-list-provider
• board-scope-filter

Steps to Reproduce

1.  performance test via Data Center App Performance Toolkit

Expected Results

No slowness happened for projects without board

Actual Results

Slowness is obverved for projects without board in performance test.

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available