Many factors affect performance when rendering and using forms, including the type of form. Non-interactive forms can be rendered more quickly than interactive forms.
Other factors that affect performance include the fonts used in the form and the number, type, and complexity of objects. For forms that are bound to data sources, the structure of the data also affects performance.
LiveCycle Designer ES provides many options for designing forms. Often, you can produce the same results on a form by using different design options. When making design choices, you should consider the effects on performance of each option.
See also 

About performance