Performance
For me, performance is a touchy subject, as the G3 was somewhat inconsistent in this category. Let us say, a phone with a Snapdragon 801 quad-core clocked at 2.5GHz with 3GB probably shouldn’t stutter. And even if it stutters, it should never lag or feel “janky.” At no point did the G3 feel extremely bogged down by processes, but during window and transition animations, the phone seems rather slow. Compared to say, an iPhone with perfect rotation animations, the G3 and most other Android devices still have a ways to go to catch up when switching between portrait and landscape animations.
As for gaming and multi-tasking applications, the G3 does well. When playing a game, you will probably never experience any stutter or lag, unlike the experience we had with the Galaxy S5. To test the gaming, I played a bit of Deus Ex, Smash Hit, Leo’s Fortune, Need for Speed: Most Wanted, and other minor gaming titles. During my time, I had zero issues while gaming. For me, as a big time mobile gamer, that’s important.
Since gaming seems fine, even with the processor and GPU pushing the QHD display, any type of stutter during operation leads me to believe that LG’s skin is the culprit for any type of performance issues. This is exactly the conclusion we came to when reviewing the Galaxy S5, so the only thing we can ask is that OEMs begin toning down their skins with the chance of boosting performance across the device. TL;DR version – Performance is great, but you can expect a few stutters here and there across the device’s user interface. – T
http://www.droid-life.com/2014/07/18/lg-g3-review/