Why has mp3 so high CPU usage under OS X?

[monstar-x]

Why has mp3 so high CPU usage under OS X?
If i run a mp3 Stream or mp3 File, OS X use allways 10-12% CPU Load.
Under Windows and Linux just 1-2%.
Why is this so?


OS X Snow Leopard 10.6.7
- VLC, iTunes, VOX, mplayer commandline

 

[chrono1081]

Why has mp3 so high CPU usage under OS X?
If i run a mp3 Stream or mp3 File, OS X use allways 10-12% CPU Load.
Under Windows and Linux just 1-2%.
Why is this so?


OS X Snow Leopard 10.6.7
- VLC, iTunes, VOX, mplayer commandline

It doesn't. Your looking at a program that is running the mp3. Play the mp3 in quicklook and it won't even be a single percent.

 

[monstar-x]

It doesn't. Your looking at a program that is running the mp3. Play the mp3 in quicklook and it won't even be a single percent.

Quicklook also use over 10% CPU.

0.1% when i dont play mp3 via Quicklook.
12.6% when i play mp3 via Quicklook.

 

[iThinkergoiMac]

No measurable difference on my computer, whether playing an MP3 or not. There's a brief spike as it opens, but that's not unusual.

 

[ShadowofBob]

Bumping an old thread because in Lion(this may have happened in Snow Leopard as well, but I never had activity monitor open to verify this) my CPU usage jumps from 0.5% to ~25% when using quicklook on an icon to preview an mp3. If I press spacebar to make it preview in a quicklook window, not just pressing play on the icon, the usage goes to a more tolerable 2-3%

Anyone else have this issue?