I often get annoying game lag these days and I have a fair beast of a PC - I eventually tracked mine down to two things that were clogging up the PC while playing: The Battle Net Portal screen (since they started playing videos etc on there, it makes my frame rate plummet until I close it) The Hearthstone Deck Tracker - Usually closing it and restarting it fixes it for me (but it starts to eat resources sometimes)
Fixing these two things (and closing down Chrome if running loads of tabs, etc) seems to fix the issue for me most of the time
I often get annoying game lag these days and I have a fair beast of a PC - I eventually tracked mine down to two things that were clogging up the PC while playing:
The Battle Net Portal screen (since they started playing videos etc on there, it makes my frame rate plummet until I close it)
The Hearthstone Deck Tracker - Usually closing it and restarting it fixes it for me (but it starts to eat resources sometimes)
Fixing these two things (and closing down Chrome if running loads of tabs, etc) seems to fix the issue for me most of the time