MagicLord Hi there, Godot 3 has noticeable performance problem for 2D, most projects should use Godot 2 until this is resolved. https://github.com/godotengine/godot/issues/18481
Megalomaniak Quoted from github: This is build related and not an actual issue. I followed Compiling for Windows and it lacks a crucial information of adding target=release_debug for tool build (mentioned in introduction to buildsystem only). I have re-built 8d199a9 with said target and it performs as expected.
MagicLord I guess he did not compile last build and he is using 3.0.2 that has this performance issue.