direct    1000000   0.632544
    direct    1000000   0.633028
    direct    1000000   0.633403

   forloop    1000000   1.02326
   forloop    1000000   1.02204
   forloop    1000000   1.02385

 yieldfrom    1000000   0.665167
 yieldfrom    1000000   0.664271
 yieldfrom    1000000   0.666963

Delegation overhead = 8.3% of for-loop