Advantages of Vectorization and the Effects of Data Size

Featuring the Intel® Advisor tool, this video demonstrates the increases in speed and decreases in loop trip counts that can be gained by vectorizing code, examines how data type sizes can affect these results, and shows how to tweak them for maximal gains. The demo compares the trip counts and run times of the scalar and vectorized versions of a pair of loops to show the massive improvement gained by vectorization … and the consequences of using more bytes than you need. It also shows how to use aspects of Intel Advisor’s Survey Report to gain diagnostic information about the vectorized loops.