Demo FPS 20fps while potential FPS 60fps

Running the instance Demo both from the babylonjs.com website and locally:

I see potential FPS in debug overlay showing ~60 FPS.

Actual FPS is ~15 FPS.

I tested this in both Chrome and Firefox on both Linux and OSX.

I tried removing various parts of the code. Reducing instance count to 10, removing collision tests from all objects. The FPS rises somewhat but the problem persists.

I tried checking out the v2.5.0 tag in case something in latest was causing the problem. The problem persists.

I think this may be due to BabylonJS depending soley on requestAnimationFrame for update/draw logic (which creates several problems actually, but I created a separate post to address that). I assume there must be something wrong in the update logic, but I am new to BabylonJS.

Is anyone else seeing a low FPS number on the babylon website?

See attached screenshot where render and frame are only 5ms and 8ms (potential FPS is 128) yet FPS is only 40!