7-Way Linux Laptop Comparison From Sandy Bridge To Broadwell

For those curious about how Intel's laptop/ultrabook CPUs have evolved over the past few generations and whether it's worthwhile upgrading from one generation to the next, here's a fresh Linux laptop comparison with seven different laptops being tested on Ubuntu 15.10 x86_64 and comparing these laptops from Sandy Bridge to Broadwell on a variety of workloads while also doing some performance-per-Watt measurements.