https://www.cnet.com/news/intel-bets-on-a-big-speed-boost-for-8th-gen-core-chips/

So, one of the big selling points for the just-announced 8th generation of Core i-series CPUs is that these new chips are twice as fast as those found in five-year-old laptops. That's not too much of a stretch, as we've seen massive performance improvements over the last five years in laptops, desktops, hybrids and tablets.

More potentially interesting is Intel's claim of up to a 40-percent improvement over the current 7th-gen Core i-series CPUs, which many PC makers have only recently rolled out across their product lines. Intel called it a "once in a decade" performance jump in a briefing for reporters.