Initialize multiple engine on Firefox (50% performance loss)

[Dad72]

Hello,

I just saw a 50% drop on firefox when we create multiple Babylon engine. On Chrome and Opera, I'm 60 FPS on my scene, but when I use Firefox I'm 30 FPS.

I use several engine because I have several tab for my editor (one for actors, one for animation, one for particles, one for the terrains ...) I have 8 engines to initialize. If I try to create only one engine for the terrain (I comment on the others) I go back to 60 FPS on Firefox.

In console Firefox I have :  

Quote

Error: WebGL warning: <SetDimensions>: Exceeded 16 live WebGL contexts for this principal, losing the least recently used one.

I do not create 16 engines, but 8. I do not have this problem on Chrome and Opera. On Edge, I'm 2 FPS, (It's catastrophic)

My question is, what can I do? you will tell me to create a single engine for each canvas, but I understood that I had to create only 1 engine per canvas (that's what I do, but firefox handles it very badly )

Solutions ?

[Guest]

We are creating additional engines when you call Engine.IsSupported so perhaps you could remove this call?

For performance, I highly suggest creating a ticket on Bugzilla for Firefox

[Dad72]

No, I do not use Engine.IsSupported, should I use this?

I do not know how it goes the creation of ticket on bugzillla, I've never done, I'm not registered and I do not know what to explain in English correct

[Dad72]

This error is reported by Babylon for Firefox, but not in other browsers.

Error: WebGL warning: <SetDimensions>: Exceeded 16 live WebGL contexts for this principal, losing the least recently used one.

Line :

this._gl = (canvas.getContext("webgl2", options) || canvas.getContext("experimental-webgl2", options));

// GL
                if (!options.disableWebGL2Support) {
                    try {
                        this._gl = (canvas.getContext("webgl2", options) || canvas.getContext("experimental-webgl2", options));
                        if (this._gl) {
                            this._webGLVersion = 2.0;
                            // Prevent weird browsers to lie :-)
                            if (!this._gl.deleteQuery) {
                                this._webGLVersion = 1.0;
                            }
                        }
                    }
                    catch (e) {
                        // Do nothing
                    }
                }

Console :

 

[Guest]

This is weird, if you create only 8 engines that you have 16 webgl contexts then...

Can you open a ticket at Mozilla?

[Dad72]

In fact, this also happens when I create a single engine, but my FPS goes back to 60.

I'm not registered to open tickets and I do not know where it is and what to say and what should I provide?

Or does it find it? any ideas of how I report this bug? Thank you DK

[Dad72]

Report here :

https://bugzilla.mozilla.org/show_bug.cgi?id=1502463

[Guest]

perfect!