Other stutter issues

Are you on windows 10? Sounds like gfx issue (which I suffer from as well)

In which case, the only solution is to downgrade your windows, unfortunately.

 

Unfortunately it's an inherent issue with Windows 10. We tried finding fixes and also employed a few changes to reduce the lag, but ultimately the problem remains. If anyone has a solution to this I'd very much like to know myself.

I know turning on compatibility mode can actually reduce the performance. If you have that on, try running with it unchecked.

Also I never tested it but it might be better if you turn down graphic settings in-game.

 

This is just the way computers work, unfortunately. The graphics for each skill or item must be loaded from physical disk space into memory. This can actually take some noticeable time.

It's not to say the problem couldn't potentially be fixed.. but likely it would involve optimizing the client to be sure to have all your skill animations loaded upon selecting your character.. or better redirecting of the code to not stop visible animations and controls when something else needs loading. Of course we'd pretty much need a client coded from scratch to do this.

Best advice I can give you is try to defragment your hard drive. What this will do is help ensure that when your computer needs to load something into memory, all the information it needs should be in the same place and in a sequential order. You should find these stutters happening less frequently and being less severe when you do this.

 

I have this issue(not for me anyway) too but it's only a fraction of a second, barely noticeable. I do hear my hard drive click two or three times when it happen, to confirm what Lionheart said about a hard drive issue. I bet a lot of people have it but 1..5 seconds is pretty bad. You should probably run a S.M.A.R.T. test and try defragmenting indeed, or even try running ML from a flash drive

https://crystalmark.info/en/software/crystaldiskinfo/

 

I can, with 100% certainty, say that it's your hard drive. My old laptop had a terribly slow hdd and new stuff freezes the laptop too. It's maple loading the images from your hard drive. Having a solid state disk should make it barely noticeable.