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Desmos extreme CPU usage

Daniel Ulrich
Daniel Ulrich
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Hello, long time Firefox user here!

Open site https://www.desmos.com/calculator, a well-known site for math graphing In a completely empty graph (no sources of CPU usage), select settings (top right wrench button) and select the polar grid option (circular grid). Simply click and wiggle the coordinate space a bit and CPU will quickly reach 100% usage.

Tech stats: Firefox x64 (newest version), high CPU usage occurred with and without active extensions, my CPU is a i7 8-core 4GHz

This does *not* happen if a different browser is used (e.g. I tested with Chromium), or Desmos is used with the regular cartesian grid option. Ram usage and GPU usage are negligible either way.

Related: https://bugzilla.mozilla.org/show_bug.cgi?id=1446863 they claim "low fps" but I'm guessing that's a symptom of high CPU usage.

Thank You in advance! Daniel

Hello, long time Firefox user here! Open site https://www.desmos.com/calculator, a well-known site for math graphing In a completely empty graph (no sources of CPU usage), select settings (top right wrench button) and select the polar grid option (circular grid). Simply click and wiggle the coordinate space a bit and CPU will quickly reach 100% usage. Tech stats: Firefox x64 (newest version), high CPU usage occurred with and without active extensions, my CPU is a i7 8-core 4GHz This does *not* happen if a different browser is used (e.g. I tested with Chromium), or Desmos is used with the regular cartesian grid option. Ram usage and GPU usage are negligible either way. Related: https://bugzilla.mozilla.org/show_bug.cgi?id=1446863 they claim "low fps" but I'm guessing that's a symptom of high CPU usage. Thank You in advance! Daniel

Alle svar (2)

zeroknight
zeroknight
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Moving the polar graph around uses significant CPU for me on both Firefox and Chromium. Firefox uses about 20% more but is also smoother and more responsive. A bottlenecked GPU can produce lower CPU usage but is actually due to lower performance.

Daniel Ulrich
Daniel Ulrich Spørgsmålsstiller
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zeroknight said
Moving the polar graph around uses significant CPU for me on both Firefox and Chromium. Firefox uses about 20% more but is also smoother and more responsive.

Thanks for your reply. It seems that you can't reproduce my issue. Firefox uses *significantly* more CPU on Firefox, and Chromium uses *negligible* CPU for simply moving around the graph. (You don't need to convince me that Firefox is better, I still prefer it over Chromium - this post is just about a single issue.)

zeroknight said
A bottlenecked GPU can produce lower CPU usage but is actually due to lower performance.

I don't understand what you're saying, sorry. My GPU is (barely) being utilized when moving around the graph.