Since Xcode 13.2.1 I get flooded with CVDisplayLink debug / warning messages.
Like
CVDisplayLink::start
CVDisplayLink::stop
20 times a second or so.
I think they may come from an WebView which runs an embedded version of the Ace editor.
Does anybody know how to prevent the CVDisplayLink messages specifically ?
Unfortunately disabling OS_ACTIVITY_MODE disables all system logs output including os_log(..)
I found a better solution:
CFPreferencesSetValue("cv_note" as CFString, 0 as CFPropertyList, "com.apple.corevideo" as CFString, kCFPreferencesCurrentUser, kCFPreferencesAnyHost)
CFPreferencesSynchronize("com.apple.corevideo" as CFString, kCFPreferencesCurrentUser, kCFPreferencesAnyHost)
The easiest way to disable the messages is to execute the following command in Terminal:
defaults write com.apple.corevideo cv_note 0
(Credits for figuring out the keys go to Alexey Martemyanov's answer!)
I get these messages too and also think it has to do with WKWebview.
My only workaround for now is trying to silence them with: OS_ACTIVITY_MODE = disable on the Scheme.
On Xcode go to Product > Scheme > Edit Scheme
On Run > Arguments add the Environment Variable:
OS_ACTIVITY_MODE and set the Value to disable
These debug messages should not be there next time you run the app.