image or rect

I never tested it, but it's easy to do so:

t1=millisecs()
for i=0 to 10000
 rect 100,100,100,100,1
next
t2=millisecs()
for i=0 to 10000
 drawblock img,100,100 ; of course, must be a 100*100 img
next
t3=millisecs()

print t2-t1
print t3-t2
waitkey()