slow execution of create project dialog

Summary

Modal loads slowly when creating a project and returns an error message as seen below

Environment

• JIRA configured with multiple LDAP connectors and/or high amount of users in application

Steps to Reproduce

1. Connect JIRA to one or more LDAP directories which syncs a large amount of users

Expected Results

• Faster load on create project modal

Actual Results

A large amount of time is spent fetching users. This can be seen from profiling application here:

Workaround

• There is a 5 second timeout on the create project dialog in JIRA 7.0.0, 7.0.1 and 7.02 which exasperates this problem. In JIRA 7.0.4 the timeout has been increased to 60 seconds. Upgrading to a JIRA version later than 7.0.3 should help.

Original Description:

In certain situations (a lot of external user directories) create project dialog can timeout due to slow backend processing.
In my case client had like 17 AD configured and during the create project dialog there is some code executed:
com.atlassian.jira.projecttemplates.rest.ProjectTemplatesResource#getProjectTemplates

...
                .shouldShowProjectLead(userManager.getTotalUserCount() > 1 || !authContext.isLoggedInUser())
...

the offending line is:

userManager.getTotalUserCount() > 1

which basically means that we want to display project lead picker (user picker).
The current implementation iterates over all directories and handles shadow users and it's slow. but in this case we need only information if there are multiple users in the system (more than 1).
maybe instead of

userManager.getTotalUserCount()

we could use something like

com.atlassian.jira.bc.user.search.DefaultUserPickerSearchService#findUsers(com.atlassian.jira.bc.JiraServiceContext, java.lang.String, com.atlassian.jira.bc.user.search.UserSearchParams)

and pass parameter that limits output to 2 users (or any other way of doing some fast query with user limit)