mobile and HTML5 games are very laggy and graphical bugs

GDevelop general Bugs reports
1

-Even if i use a little bit of objects at low resolution and a little bit of events the game is very laggy, its the worst bug…
-Many times the graphics gets bugs like that

2

Well it depends. I have similar problem on my phone and old pc, but on a newer pc it is smooth.
The html 5 engine uses webgl, and probably load all images as textures, so the size of your images shouldn’t be too big.

I think you can leave 1-2 transparent pixels along the image border to fix the glitch in your pictures. Just curious, can you post the original images you are using?

3

yep there is the image that gets the issue

the lag is a big problem because not everybody has a good phone so if i want to sell a game or something it will be more difficult

4

This (leaving 1 pixel space) seems to have fix the problem.

Edit*

Also, you can hack the javascript to make the renderer round the pixels. This also fixes the problem.

Find pixi-renderers\runtimegame-pixi-renderer.js in your output directory (or in your gd install directory JsPlatform\Runtime\pixi-renderers).

Change line 36 to this:

    this._pixiRenderer = PIXI.autoDetectRenderer(this._game.getDefaultWidth(), this._game.getDefaultHeight(), {roundPixels:true});