what's faster in this case?

where tmyline is 
type tmyline = class(tobject)
	start,stop:integer;
end;

and linelist is 
linelist:array of tlist;
with tmylines added to it.


line := tmyline.create;
line := tmyline(lineliste[x]);
linestart := line.start;
linestop := line.stop;
line.free;

or

linestart := tmyline(linelist[x]).start;
linestop := tmyline(linelist[x]).stop;