Searching of Custom fields in ViewCustomFields Page is slow

Issue Summary

Searching of custom fields in the ViewCustomFields.jspa page is slow. It can take 30+ seconds to filter the results of the searched fields.

Environment

• Jira 7.12+
• 1500 custom fields
• 6000 screens

Steps to Reproduce

1. Go to ViewCustomFields.jspa page
2. Search for a custom field

Expected Results

The results of the filtered custom field return quickly

Actual Results

The results of the filtered custom field take a long time (30+ seconds) to return the custom field

Notes

The searching for the custom field will have the REST API /rest/api/2/customFields to iterate over screens of each custom fields.

Workaround

Perform spring cleaning to try and reduce

• the total number of custom fields
• the total number of screens

Note on Fix

The number of operations needed to perform the search has been reduced by avoiding obtaining a list of all screen fields for each custom field.