I've seen the complaints 6 months ago about unacceptably high CPU usage while the IDE is not doing anything. When will this be fixed? My desktop's cooling fan sounds like the desktop is ready for take-off :face_with_diagonal_mouth: :face_with_diagonal_mouth: :face_with_diagonal_mouth: [image]

Hi @gilbert54 [image] gilbert54: When will this be fixed? The developers investigated those reports of exceptional CPU usage and made fixes and efficiency improvements last year. The affected users reported that the problem was resolved to their satisfaction. So, as long as you are using a …

@ptilisch thanks for the prompt reply. I'm using IDE version 2.1.1, which to my knowledge is the latest and greatest (?) version. While my CPU is blowing me away the IDE is idle (or should be). I'm not compiling, loading, altering anything. Even when I'm back from refilling my coffee cup the CPU coo…

Do you see a message like "indexing 3/27" or "Building sketch" on the left side of the status bar at the bottom of the Arduino IDE window while the IDE is producing this unexpected CPU usage?

While compiling the CPU is at 100 % [image] After that nothing interesting going on in the IDE... [image] I might add that CPU usage goes back to +/- normal after compiling the sketch. It only gets ugly when I do a few edits to the sketch.

Believe it or not... I left the IDE alone for a few minutes and now CPU usage is jumping around between 5 and 20 %... I'm not doing anything in the IDE. [image]

Had another look at my task manager. When the IDE is consuming CPU, it's the clangd.exe which is playing up and never shutting up. For some reason clangd.exe doesn't stop going crazy when I leave the IDE alone. Except now of course..

IDE 2.1 High CPU usage

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IDE 2.1 High CPU usage

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