https://www.theregister.co.uk/2018/01/09/meltdown_spectre_slowdown/

Analysis Having shot itself in the foot by prioritizing processor speed over security, the chip industry's fix involves doing the same to customers.

The patches being put in place to address the Meltdown and Spectre bugs that affect most modern CPUs were supposed be airy little things of no consequence. Instead, for some unlucky people, they're anchors.