I have been trying to figure out for weeks now why the game sometimes stutter during large AoE pulls and I think have finally figured out what has been causing the stutters.
It’s the Achievements.
If you go and select one achievement with many conditions like Glory of the Hero, open it up so you see all the requirements, then close the achievement page and now your game will slightly stutter if you AoE 15+ mobs.
Sadly I had two videos as an example but cannot link them.
So it seems like closing the achievement panel still has the selected achievement loaded in the background. Even if you can’t actually see it, however if you go back
to the same achievement and deselect it then the game will run fine again.
This means that during your normal game sessions, lets say you raid Ulduar and then the raid earns an achievement, most people will click on it to read what it was for,
but now they will also get worse performance for the rest of the night without knowing.
The Statistic tab is also affected by this.
If you have been playing on the same character since launch it can be quite bad.
For me the scrolling through the consumable section in the statistics will cause fps lag to occur, and closing the panel while on it will leave the game unplayable in combat.
I have tried reinstalling the game, running it with no addons. also had several friends test it out and they have experienced the same thing.
These actions wont trigger any stutter
-Progressing on an achievement
-Earning an achievement
But these will trigger stutter
-selecting an achievement
-Opening statistics panel and closing it
-Clicking on the achievement pop up when you earn it, since it will also select it.
Symptoms:
To notice the stutter I have to usually group 10-50 mobs, so each time I deal damage with arcane explosion it will make the game stutter along with a huge loss in frame rate.
Channeling spells like blizzard will have stutter occurring on each tick of damage.
If I go into the statistics tab, I can make the stutter extremely bad, to the point even
single target spells against a single mob will stutter.
It seems to be mainly related when you deal damage, non combat spells like Fire ward, mana shield, arcane intellect is fine.
Casting Blizzard and AoEing without hitting any mobs also does not cause stutter.
But taking damage and dealing damage does stutter, so does consuming mana pots, halloween treats and sitting down to drink etc.
Actually I think anything that is tracked in the statistics will cause stutter if you have opened and close the statistic tab during the session.
Because /hug is tracked, spamming /hug cause stutters , but /fart is not tracked so its fine.
What needs to be fixed?
When you close the achievement panel it needs to deselect any selected achievement, this should prevent it from being active in the background after closing and thus fix the stutter.
And if you had the statistics panel open, it needs to go back the summery section in the achievement panel on closing, currently closing the statistics panel will
leave it active in the background until you open the achievement panel again where it will default back the the summary section and the stutter is gone.
What can u do to prevent it?
-Reload ui will reset panels back to its original state and fix the lag.
-If you have opened the statistics tab, then just open the achievement page again and close it.
-If you have selected any achievement, deselect it
Hopefully more people can confirm this so its just not on my end!
And hopefully this will make your raids smoother.