So far it's been running for about 4 hours. One thing to note is that I did not have the prerequisites and had to download them though contrib/download_prerequisites. Not sure if it adds to the compile time or not.
Machine specs listed below:
4 CPUs Intel(R) Xeon(R) CPU E5-2650 0 @ 2.00GHz uname -a Linux <name> 3.10.0-693.17.1.el7.x86_64 #1 SMP Thu Jan 25 13:49:55 PST 2018 x86_64 x86_64 x86_64 GNU/Linux free -m total used free shared buff/cache available Mem: 11854 676 1040 8 10137 10821 Swap: 5119 0 5119