My Intel Core i3 computer gets slow sometimes, since I installed Loki. I'm quite a fan of Elementary OS and loved the way my laptop's performance improved with Luna and even better with Freya, but with Loki I have a series of lags that I don't know how to solve or replicate.
Considering it has 4Gb of RAM, and it is a standalone PC (no Virtual Host), I'm unable to say what is causing these lags. The only thing I can tell is that it happens sometimes during Internet Browsing (Firefox, Chrome, even Empathy), and most of the time waking up from sleep mode if I'm gone for a few minutes.
But, noticing that I can watch movies there with VLC, even with HD videos through HDMI, I don't think it's an issue related with the amount of RAM or video drivers.
So, what I really want to know is what are the tools or steps needed to be followed, so I can narrow the possible causes?
I'm relatively a noob, so your help will be appreciated.