Unresponsive Workspace Members Page List

Issue Summary

The enterprise Member management (https://trello.com/w/looper2/members/guests ) under workspace is unresponsive for enterprise workspace https://trfind.prod.atl-paas.net/workspace/559fef32b5acc3f4963a66b9.

Observations:

• The user is unable to search/filter by name for any member, the page hangs

• Scrolling to view more members also hangs, after the initial set of member list view

• Collaborators: 1226, Guests: 1108, Multi-board Guests: 482

• Loading the page invokes multiple API calls to {{/1/organization/:id }}with different request args. Some API calls are taking ~19 seconds with a response payload size > 5MB

GSAC Ticket: https://getsupport.atlassian.com/browse/TRELLO-191603

Steps to Reproduce

1. Navigate to the workspace admin - https://trello.com/w/looper2/members/guests
2. Search for the user - The page is not responding and the search is not working.
 
https://trello.atlassian.net/browse/TRELP-9952 

Expected Results

The user filter search should work without any delay

Actual Results

The page is not responding and the search is not working.

Workaround

Currently there is no known workaround for this behavior.