If you have been waiting for the Grand Slam of mobile chipset benchmarks, after Snapdragon 820 and Exynos 8 Octa were just announced, today is your lucky day, as you can not only see them pitted against each other, but also against Apple's A9, Huawei's newest Kirin 950, and Helio X20 from MediaTek - the who is who of mobile silicon.
As you can see in the graphics above, coming from the same source that leaked the A9 benchmarks before the iPhone 6s was even announced, it's Apple's chipset that still rules the single-core performance charts. Of course, the Snapdragon 820 benchmarks have likely been collected from tests on a Qualcomm reference platform, as there is still no device with it on the market, and ditto for the Exynos 8890 that just got announced, so we might see the rankings change when these two hit the shelves in a finished product.
Furthermore, the multi-core performance of the new Exynos is most probably going to be crushing everyone else, but when it comes to single-core, and on a clock-for-clock basis, Apple's custom A9 is quite the beast. The other interesting phenomenon observed from this historical mobile chipset benchmarks chart, is that the newest Snapdragon and Exynos SoCs are almost on par in their core performance, which might explain the rumor that Samsung may be using those as interchangeable in its upcoming Galaxy S7.