The RedMagic 6S Pro was the fastest smartphone in the world, at least according to AnTuTu's Android leaderboard. The Black Shark 4S Pro has brought the RedMagic 6S Pro's dominance to an end though, with a score that exceeds 875,000 points.
https://www.notebookcheck.net/The-Black-Shark-4S-Pro-takes-the-AnTuTu-crown-from-the-RedMagic-6S-Pro-after-just-a-month.576841.0.html