Observed:
LEN(),VARTYPE(),TYPE() and ???? are optimized
respect to a field.

Expected:
they should be also optimized for a variable too:

CLEAR
CREATE cursor Test (longString  W)
APPEND BLANK
REPLACE longString WITH REPLICATE('aaaaaaaaaaaaaaaa',1000000)
SCATTER MEMVAR memo  

	t1=SECONDS()
	FOR k=1 TO 50
		=len(longString)
	NEXT
	? "len(longString) =",SECONDS()-t1

	t1=SECONDS()
	FOR k=1 TO 50
		=len(Test.longString)
	NEXT
	? "len(longString) =",SECONDS()-t1
	
	t1=SECONDS()
	FOR k=1 TO 50
		=len(m.longString)
	NEXT
	? "len(m.longString) =",SECONDS()-t1

	t1=SECONDS()
	FOR k=1 TO 50
		=VARTYPE(longString)
	NEXT
	? "VARTYPE(longString) =",SECONDS()-t1

	t1=SECONDS()
	FOR k=1 TO 50
		=VARTYPE(Test.longString)
	NEXT
	? "VARTYPE(longString) =",SECONDS()-t1
	
	t1=SECONDS()
	FOR k=1 TO 50
		=VARTYPE(m.longString)
	NEXT
	? "VARTYPE(m.longString) =",SECONDS()-t1