https://www.theguardian.com/technology/2018/jan/08/meltdown-spectre-slowdowns-fix-processor-flaws-fortnite-epic-games

Increased processor use occurred when company installed patches to fix flaws, leaving players of online battle game Fortnite unable to login

The first real-world effects of processor vulnerabilities Meltdown and Spectre are beginning to show, due to fixes for the two megabugs which have the side-effect of slowing down cloud services worldwide.