java - Change field value using cglib -

suppose have object field of class java.lang.reflect.field. possible change value of field of object o1 value of o2`s field field.set(o1, o2). wondering whether can done faster of library, example cglib?

no, jvm implements jit compiler makes byte code generation obsolete performance in 99.9% of cases. in case of reflection, people sometime use code generation avoid security checks reflection api implies. rather that, should methodhandles moves security check handle creation such not triggered on each call.