https://support.office.com/en-US/article/Best-practices-to-improve-Resource-Engagements-performance-203972b9-3625-44af-9d77-19cedc8bd290

There’s been feedback that Project Online customers were experiencing page load delays and timeouts when trying to view Resource Requests. To address this, last month Microsoft published Best practices to improve Resource Engagements performance. This article provides customers with methods of preventing these errors, such as creating views that will help them to display only the proposed Resource Requests for users they manage.