"After starting to run some Raspberry Pi Zero benchmarks this
weekend, I'm back today with more benchmarks. In this article is also an
interesting comparison showing the performance of the Raspberry Pi Zero
and Raspberry Pi 2 against old "Northwood" Pentium 4 and Celeron
processors from the Socket 478 NetBurst days. The many results in this
article also include power consumption and performance-per-Watt metrics
for this $5 ARM single board computer."