What Is Pagination?
Put simply, it's page-by-page navigation. It's a way to display a large amount of homogeneous information by dividing the content into pages. Many Salesforce developers, myself included, often encounter pagination when displaying a significant volume of data on the user interface. On one of my projects, we were presenting phone numbers in a data table. However, in certain cases, the data wouldn't display, as the information retrieval took too long. Users were unable to access any data. So, why did this happen?
1. Contacts Were Selected Through Several Nested Database Queries
We were dealing with multiple levels of parent-child relationships between Contacts and child objects. Due to business logic requirements, we needed to filter contacts based on filters applied both to the contacts themselves and to filters applied to the child objects of the contacts.