685b311401
* ThreadStore: Remove quadratic complexity for participants population While populating the participants, we would traverse the global list twice to get the users for that thread. For threads with large number of users, this can take considerable time. We replace that with a map to change it to O(n). While here, we improve memory usage of this code by pre-allocating slices and maps. And also add some comments to help readers. https://community-daily.mattermost.com/boards/workspace/zyoahc9uapdn3xdptac6jb69ic/285b80a3-257d-41f6-8cf4-ed80ca9d92e5/495cdb4d-c13a-4992-8eb9-80cfee2819a4?c=c9aa17f3-b918-4a78-86aa-01562e418634 ```release-note NONE ``` * Apply in post store as well ```release-note NONE ``` Co-authored-by: Mattermod <mattermod@users.noreply.github.com>