Performance comparison (cpu usage, memory, and speed) between 1.3.6 and 1.4.0

Per discussion, we should do some performance comparisons between 1.3.6 and 1.4.0.

Setup should be a large build done using a local nexus 1.3.6, then run two more times. Once with Nexus 1.3.6 proxying the first nexus, then with 1.4.

During the build we need to monitor heap usage, cpu usage of nexus, and build speed.