Returns whether the SpringEL compiler should be enabled in SpringEL expressions or not.
Expression compilation can significantly improve the performance of Spring EL expressions, but
might not be adequate for every environment. Read
the
official Spring documentation for more detail.
Also note that although Spring includes a SpEL compiler since Spring 4.1, most expressions
in Thymeleaf templates will only be able to properly benefit from this compilation step when at least
Spring Framework version 4.2.4 is used.
This flag is set to
false by default.