allocating 1200MB a peice (2.4GB total) two zero-initialized memory blocks
        Time: 3840.805033MB/s
change all values of allocated memory 1 element at a time
        Time: 2507.197747MB/s
copy array a to array b
        Time: 2975.253330MB/s
copy array a to array b in incrementing steps of 32MB
        Time: 2988.598547MB/s
copy array a to array b in incrementing steps of 128MB
        Time: 2988.580593MB/s
copy array a to array b 1 element at a time (dumb test)
        Time: 1947.587183MB/s
free arrays
        Time: 0.094334
Done.