Firstly, let me apologize for my English and the lack of technical terminology in my vocabulary.
Secondly, a disclaimer: I do not own any Samsung phone. I think that my wife's LG G2 is the greatest phone in the world.
Let's get to the point...
Polish site PCLab has just published a detailed review of G3 (European model) with some astounding tests' results that might shed some light on all disturbing reports about problems with LG's new flagship device. And while Polish journalist praise the phone for its incredible design, great UI, decent camera, they are at the same time very disappointed with some serious software and hardware problems that G3 is suffering from. I have read tons of different reviews, but it's the first one that explains why this phone "lags", overheats etc.
Problem: POOR BENCHMARKS' RESULTS, LAGS
1. It seems that RAM sticks (is that the correct word?) in G3 are worse in terms of quality than the ones from G2.
2. CPU management is set to deliberately lower clock rate and restrict maximum clock rate to one core only in most of the cases. And when all four cores are in use, CPU management does not allow them to work at maximum rate at all. It has some serious impact on UI operations as well and makes better chpset in G3 perform worse than Snapdragon 800 in G2.
3. The temperature. G3 has some serious problems with heat distribution. When the CPU is working for longer period of time, the clock rate is lowered to 1.5 GHz and (what's worse) GPU clock is being seriously restrained. For example, after several minutes GPU clock rate is slowered by 40% (from, say, 20 fps to 12 fps)! It's the worse throttling among all new flagships.
4. There's no trimming in system's internal memory. That's one of the most important causes of "lags".
5. The new UI has some problems with memory management. Sometimes while using few apps there is only 174 MB of 2 GB of memory avaible! And the only way to free memory is to restart the device.
And yes, this review also confirms problems with oversharpening of the text on G2 dispay. The reviewer says that it's the software issue (or rather: "LG's conscious marketing decision").
You can see all the screenshots from various tests here:
I have no idea if these problems might be fixed with some software updates, but I really do hope so!