Version: 49.0.2623.112 (Official Build) (64-bit)
OS: Linux 

Load http://art.muth.org/helios.html
Wait 1h-2h
The JS will eventually crash ("out of memory").

Internally the code does essentially:

for each redraw:
   gl.bindBuffer(WEBGL.ELEMENT_ARRAY_BUFFER, buffer);
  [compute new array "data"]
   gl.bufferData(WEBGL.ELEMENT_ARRAY_BUFFER, data, WEBGL.DYNAMIC_DRAW);

So it updates the data for the same buffer over and over again.
GPU memory usage is minimal and does seem to grow.


The code is dart transpiled to JS - so there could be other issues.
However, Firefox does not seem to run out of memory, so Chrome
seems to be the most likely culprit.
Note, that a similar bug was file here for another platform:

https://bugs.chromium.org/p/chromium/issues/detail?id=365055