The math for my 4 hour compile didn't take in to account parallelism, the 2 hour+ builds however do, and were built on a 16 core CPU with parallel builds enable

The math for my 4 hour compile didn't take in to account parallelism, the 2 hour+ builds however do, and were built on a 16 core CPU with parallel builds enabled. It's not turning in to a short coffee break.