Apparently the smaller the window size, the less fps I have, with 1 extra it is still possible, but with more than 1 it becomes unfeasible, I tried with two 64x64 windows. Works great with larger sizes like 800x800 

I tested it on a blank project and it also happened, the effect increases when the window is in focus

I make this simple code:

//Create

var config = new winwin_config();

config.caption = "Hello!";

config.resize = true;

global.window = [[window_get_x() + 800,window_get_y(), 100,100],

[window_get_x() + 900,window_get_y(), 400,400],

[window_get_x() + 1000,window_get_y(), 100,100]]

for(var i = 0; i < array_length(global.window); i++)

global.window[i] = winwin_create(global.window[i][0],global.window[i][1], global.window[i][2],global.window[i][3], config);

//Draw

for(var i = 0; i < array_length(global.window); i++){

winwin_draw_begin(global.window[i]);

winwin_draw_clear(#405070);

winwin_draw_end();

}

I tested a little more and found the cause of my problem, but I didn't test as much. Apparently if the second extra window created is in smaller proportions the FPS of the main window drops considerably, in the example it works well at 400x400, but if I change it to 200x200 the problem happens

I’m not seeing this on my end by adding this to “basics” example:

Do you perhaps have a frame limit forced on in GPU settings? That’s known to cause issues on NVIDIA drivers because the driver is unprepared to count frames in several windows.