Using the standard Account List controller and implementing pagination is the best way to help alleviate the slow render times of the custom data table. This way, the Visualforce page will only load a subset of the Account records at a time, reducing the amount of data transferred and rendered. Using JavaScript remoting to query the accounts might improve the performance, but it will still load all the accounts at once, which is not efficient. Using the transient keyword in the Apex code when querying the Account records will prevent the records from being saved in the view state, but it will not reduce the query time or the render time. Uploading a third-party data table library as a static resource might enhance the look and feel of the data table, but it will not solve the underlying issue of loading too much data at once. Reference: [Standard List Controllers], [Using JavaScript Remoting to Create Visualforce Pages with Complex, Asynchronous Behavior], [Transient Keyword], [Static Resources]