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That, especially with no lua file opened, the extension does not create high CPU usage.
Actual Behaviour
By deactivating/reactivating every extension, i found that this Lua extension is driving the CPU load high in the process: "Cursor Helper (Plugin): extension-host [1-1]" even without any lua file opened.
Reproduction steps
Install lua extension in Cursor
Restart Cursor
See CPU loads go over 100%
Additional Notes
extension version: 3.17.1
Cursor version: 2.4.20
Log File
as you can see from the screenshot and compare with the creation time of this issue, no lua extension activity was logged today, last was yesterday:
Activity
michaelaye commentedon Jan 22, 2026
scratch that, wasn't Lua after all