Why does my LG G3 with Cyanogenmod 12.1 run so slowly?

Question

I own a LG-D855 which I bought refurbished running the bundled modified version of Android that LG provide.



After a few weeks I installed Cyanogenmod 12.1 and since then I've been updating weekly.



When I turn the phone on for the first time it runs very quickly. However after using the phone with a handful of apps for 15 or 30 minutes the whole phone slows down to a crawl.



I've installed an app which stops as many background processes as it can. After running this the phone speeds up again, but soon returns to it's previous state.



I bought an LG G3 as it rated very highly on lists of the best Android phones to buy.



Why am I having these problems? Are these common issues with the LG G3? What can I do to allow my phone to run more quickly?


— Peter Bridger | Sources

Answer

In the end I:




  • Performed a factory wipe

  • Install Cyanogenmod 13



Since then the phone has been running silky smooth.



It's possible that cleaning the Dalvik may sorted it, however I went for a more extreme and complete approach which ultimately worked out. The downside being I needed to setup my phone again after the fresh install.


— Peter Bridger | Sources

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