Packed ints performance test - 100M

Toke Eskildsen, te@ekot.dk, 20120702. See LUCENE-4062 for test code.

100M values (-Xms10g -Xmx10g -server -XX:+AlwaysPreTouch)

mars: Server, Intel(R) Xeon(R) CPU E5-2670 0 @ 2.60GHz, 20480 KB cache, JRE 1.6