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Busy doing nothing

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Busy doing nothing

Subject: Busy doing nothing
From: "Gerriet M. Denkmann" <email@hidden>
Date: Fri, 29 Aug 2008 16:42:41 +0700

I have an app which does not take any Cpu-time when it is doing nothing.
So what? you might say. Every app does this.

Well, not quite.

If I add these magic lines it will use 0.2% of my Cpu just doing nothing:

	NSMetadataQuery *query = [ [ NSMetadataQuery alloc] init];
	[ query startQuery ];
	[ query stopQuery ];
	NSArray *results = [ query results ];	//	_NSMetadataQueryResultArray
	[ query release ];

From now on until quit I get every 100 msec one Context Switch and two Mach System Calls - as observed via Activity Monitor.

Is this normal? Correct?
And could someone explain why?

Tiger 10.4.11


Kind regards,

Gerriet.

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