The Samsung Galaxy S7 and S7 edge Review: Part 2by Joshua Ho on July 5, 2016 8:00 AM EST
System Performance Revisited
Now that we’ve covered battery life we can revisit another topic where our testing has changed dramatically for 2016, which is our system performance benchmarks. As previously mentioned this year a major goal of ours was to focus on benchmarks with metrics that better indicate user experience rather than being subject to additional layers of indirection in addition to updating our previously used benchmarks. Probably one of the hardest problems to tackle from a testing perspective is capturing what it means to have a smooth and fast phone, and with the right benchmarks you can actually start to test for these things in a meaningful way instead of just relying on a reviewer’s word. In addition to new benchmarks, we’ve attempted to update existing types of benchmarks with tests that are more realistic and more useful rather than simple microbenchmarks that can be easily optimized against without any meaningful user experience improvements. As the Galaxy S7 edge is identical in performance to the Galaxy S7, scores for the Galaxy S7 edge are excluded for clarity.
PCMark shows that the Galaxy S7 is generally well-optimized, with good performance in native Android APIs, although devices like the OnePlus 3 pull ahead in general, likely due to differences in DVFS, lower display resolution, more RAM, and similar changes as the hardware is otherwise quite similar. In general though unless you get something with a Kirin 95x in it you aren't going to get performance much better than what you find in the Galaxy S7, although the software optimization in cases like the writing test could be better for the Snapdragon 820 version of the phone.
As hinted by the PCMark results, the Galaxy S7 with the Snapdragon 820 is really nothing to write home about when it comes to actual software optimizations, while the Exynos 8890 version is significantly faster in comparison. The fastest devices by far here are still the Kirin 950-equipped phones, but even from cold start launches the HTC 10 is comparable, and pulls ahead slightly when the applications are pre-loaded into memory. The OnePlus 3 and Xiaomi Mi5 are closer to what the S820 GS7 should be achieving, which is really more a testament to just how strangely slow the Galaxy S7 with Snapdragon 820 is.
Overall though, the Galaxy S7 in both iterations are acceptably fast for general purpose tasks. However, with that said the Snapdragon 820 variant is noticeably slower, and the software stack seems to be less optimized for whatever reason even after multiple post-launch OTAs and all the latest app updates. Given that these devices have locked bootloaders it's difficult to really go deep and try to figure out exactly what's causing these issues, but it's likely that Samsung Mobile has the engineering staff to do this and resolve these issues as a 600 USD phone really shouldn't be performing worse than a 400 USD phone. On the bright side, the Exynos 8890 variants perform quite well here, with performance comparable to top devices and often beating out Snapdragon 820 devices, although usually not by a huge margin.