Any throttling “may be less noticeable” as a result of “more advanced hardware and software design,” the company said in an updated support document. The company didn’t specify what improvements it meant, but as iPhones have evolved they have gained faster processors with more cores and coprocessors.
Until the release of iOS 12.1, throttling was limited to phones ranging from the iPhone 6 through the iPhone 7 Plus. If temperature and battery performance falls out of optimal range, iOS can sometimes slow A-series processors to prevent sudden shutdowns, resulting in lower frame rates and app launch times.
