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Google ran the tests in February 2023 using Chrome version 110.0.5481.100 on the MacBook Pro model with 8 GB RAM running MacOS Ventura 13.2.1. It measured Chrome's performance using its own open-source benchmark suite.
Google hasn't compared Chrome to Safari this time. Last year, it claimed Chrome 99 was 7% faster than the then-current builds of Safari.
François Doray, software developer for Chrome, details a number of changes that deliver performance improvements to M2 MacBooks -- and older models, too.
Google fine-tuned garbage collection and memory compression heuristic for recently created iframes after realizing that frames "live just a few seconds". As frames were created, power consumption used to go up, and now power is steady.