Why isn't Leopard utilizing all cores?

Qion

Qion

Uber Nothing
While decompressing a file, I noticed that my system was only using 100% of one of the cores instead of 100% of all four cores. Why wouldn't it use all four and get the job done that much quicker?

utilizationgl8.png
 
Because the program, bunzip2 in this case, is not multithreaded. If the program only has a single thread it cannot be automatically parallelized and run on separate cores.

Now if you have lots of things to decompress you could start 4 instances to use all four cores.
 
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