SetQOSClassMBS(QOS as Integer) as Integer   New in 26.1

const QOS_CLASS_USER_INTERACTIVE = 5
const QOS_CLASS_USER_INITIATED = 4
const QOS_CLASS_DEFAULT = 3
const QOS_CLASS_UTILITY = 2
const QOS_CLASS_BACKGROUND = 1
const QOS_CLASS_UNSPECIFIED = 0

var e as integer = SetQOSClassMBS(QOS_CLASS_BACKGROUND)

The Quality Of Service class for a thread tells the scheduler how to prioritize the thread and whether to run this on a faster or more efficient CPU core.

MacOS can run threads marked as background on an efficient core to safe battery life.
Linux does not allow to set higher priority (4 or 5) unless you have permissions to do so.

Returns a native error code or zero in case of success.

Name	Value	Description
QOS_CLASS_USER_INTERACTIVE	5	The thread handles user input.
QOS_CLASS_USER_INITIATED	4	The user requested this action.
QOS_CLASS_DEFAULT	3	Default
QOS_CLASS_UTILITY	2	Utility thread running with reduced priority, e.g. menubar utility app.
QOS_CLASS_BACKGROUND	1	Background thread with reduced priority, e.g. backup.
QOS_CLASS_UNSPECIFIED	0	Unknown level.

Some examples using this global method:

• /Util/Threads/Thread Priority

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