Flexible canvas size gets slow when resizing window

[nataliawww]

If canvas size is set to fit the container, resizing the window makes the frame rate drop a lot, from ~60 to about 5 fps.

[aypie]

I'm having exactly the same problem right now, GLSL canvas resizes without my input and it hurts the framerate because it changes size from 256x128 to Full HD whenever I resize the window, it's even worse on mobile.

[aypie]

I have found a bruteforce method to fix that. There's no documentation so I can't say if my assumptions are correct, but Search for a resize function that returns boolean and it should check for canvas sizes and stuff like that, if you remove the checks and just set the function to always return false - then resizing won't happen.