Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Wannan tattunawa ta zama daɗaɗɗiya. Yi sabuwar tambaya idan ka na bukatar taimako.

Desmos extreme CPU usage

  • 2 amsoshi
  • 0 sa na da wannan matsala
  • 1 view
  • Amsa ta ƙarshe daga Daniel Ulrich

Daniel Ulrich
Daniel Ulrich
more options

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

All Replies (2)

zeroknight
zeroknight
more options

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 Mai mallakar tambaya
more options

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.