The analysis was performed on forty C programs with over sixty thousand lines of code.

Type	#_of_copies	# involving globals on right	% used or defined	% only defined	% out of scope	% globals good for swapping	% total good for swapping
char	16	7	43.75	43.75	12.50	100.00	56.25
double	0	0	0	0	0	0	0
float	62	3	74.19	22.58	3.23	33.33	25.81
int	1286	309	66.64	20.68	12.67	29.13	33.36
user_defined_type	98	29	9.18	21.43	19.39	37.39	40.82
TOTAL	1462	348	66.21	21.07	12.72	31.32	33.79