EDIT: Update to 1.2.0. I fixed FPS drop that happened while moving.
I just tested and it seems to be staying stable at a near-solid 60FPS average.
I did however notice 2 issues though.
1) On large maps (256x256 or bigger) around every 30 seconds (give or take a few), the game would "freeze" for half a second before normalizing. When testing it in a new project and looking in the timeline debugger, when the freeze does happen, it seems to be sending a large number of calls from "Animation Frame Fired" (always a random value but well over a couple odd thousand average) and "Function Call" (it seems to always be, at least from my tests, around 1900 average) to the RPG_Managers.js. Smaller maps however tend to not be affected by this issue as much or at all.
2) If you're using a Parallax/Layering based plugin (such as Galv's Layer Graphics plugin) then there's a chance that you may run in to a minor graphical glitch.
If you have tiles set to display on the upper-layer (aka the "star" icon/symbol), they can "vanish" and "reappear" when you're moving around (only when you've moved on to "certain" tile spaces on the map so this is not simply just a "random" situation). This seems to happen more often on large maps (256x256 or larger). I've linked two screenshots below to give an example of the vanishing upper-layer tiles.
The only way to get around this issue for now (other than waiting for a possible "fix" to happen) is to adjust any tile that's set to display on the upper-layer to the lower-layer (the "circle" icon/symbol) instead to prevent the minor glitch.
