## Problem to solve Currently, you need to wait a few seconds the first time you interact with the users dropdown (or quick actions). ## Proposal We can improve that by preloading `autocomplete_sources/members` after the page is completely loaded. The only downside is increased number of requests to `autocomplete_sources/members`. **This change should be behind a feature flag gated by current_user.** <!-- Use this section to explain the feature and how it will work. It can be helpful to add technical details, design proposals, and links to related epics or issues. --> <!-- Please add a label for the type of feature as per https://about.gitlab.com/handbook/engineering/metrics/#work-type-classification -->