Jakarta Faces performance tuning

approaches to apply right from the start

• prefer HTML over JSF tags.
• no logic in getters (can be called multiple times) – especially for the rendered attribute.
• avoid logic in EL expressions.
• avoid using h:outputText. instead, use an EL expressions.
• if you need to escape HTML, it’s better to use an EL function.
• use AJAX where possible.
• only process and update components that are really required to be updated.
• use @RequestScoped where posssible. Avoid using @SessionScoped, @ViewScoped and other long lived scopes.

approaches for performance tuning

• cache data, which is required multiple times in the same view, in @RequestScoped beans.
• split your backing beans. It’s better to have a separate bean for logic and a separate bean for values which are required for multiple requests (@ViewScoped, @ViewAccessScoped…).