Nexus 5 with KitKat and Lollipop both outperformed the Nexus 6 with encryption enabled
Encryption was initially made an option by Google on all its Android devices but you might have come to hear recently that Android 5.0 has this encryption enabled by default on the Android phones. This decision has come under consideration of the recent Snowden reports and government surveillance as the company thought it was best to have the feature enabled by default. This has unfortunately led to two major problems; firstly the law enforcement officials aren’t so happy about the new development and secondly the Android devices aren’t taking this too well. This feature enabled by default comes with the potential to hamper the performance of the Google devices.
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This might be a little surprising since most of the reviews coming from our own selves were that the nexus 6 was performing flawlessly but the folks at AnandTech have something different to say. The benchmark they ran was meant to test storage read/write speed and their findings have revealed that the Nexus 6 with the encryption on performed much slower compared to the Nexus 6 with its encryption off. On the other hand, the Nexus 5, with KitKat and Lollipop both, managed to outperform the Nexus 6.
The difference in performance might not be noticed so much unless you have to work with lots of data. But you are always open to the choice of turning off your encryption if you’re the type that loves min/maxing. The instructions on the XDA forums will help you get it done easily.