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How does the content process limit affects performance?

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I am trying to solve a long term 'Web Content uses too much CPU and slows down the computer' issue and for that I have just read through some support articles including https://support.mozilla.org/en-US/kb/performance-settings.

Now, it states: "having too many content processes can slow down your computer, and consequently, Firefox". By default I read this as a cpu issue.

On the other hand, it also states: "Additional content processes can improve performance when using multiple tabs, but will also use more memory. "

So my question is, does a high content process limit can also lead to high cpu usage or only to high memory usage?

I am trying to solve a long term 'Web Content uses too much CPU and slows down the computer' issue and for that I have just read through some support articles including https://support.mozilla.org/en-US/kb/performance-settings. Now, it states: "having too many content processes can slow down your computer, and consequently, Firefox". By default I read this as a cpu issue. On the other hand, it also states: "Additional content processes can improve performance when using multiple tabs, but will also use more memory. " So my question is, does a high content process limit can also lead to high cpu usage or only to high memory usage?

Chosen solution

When the number of content processes is higher than the number of CPU cores on the specific machine, it will lead to high and inefficient CPU usage.

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TyDraniu
  • Top 25 Contributor
310 solutions 1728 answers

Chosen Solution

When the number of content processes is higher than the number of CPU cores on the specific machine, it will lead to high and inefficient CPU usage.

When the number of content processes is higher than the number of CPU cores on the specific machine, it will lead to high and inefficient CPU usage.

Question owner

TyDraniu said

When the number of content processes is higher than the number of CPU cores on the specific machine, it will lead to high and inefficient CPU usage.

This is actually quite useful to know.

So I suppose this also means that the default setting ('4') puts an extra strain on older computers (which, of course, are already slower).

Thank you!

''TyDraniu [[#answer-1150479|said]]'' <blockquote> When the number of content processes is higher than the number of CPU cores on the specific machine, it will lead to high and inefficient CPU usage. </blockquote> This is actually quite useful to know. So I suppose this also means that the default setting ('4') puts an extra strain on older computers (which, of course, are already slower). Thank you!

Modified by nocibambi