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Asked: 2026-05-14T21:24:01+00:00

This sample code compares serial method with threaded method, on Quad core processor. The

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This sample code compares serial method with threaded method, on Quad core processor. The code just uses GetPixel() to read all pixels from 4 images.
I found that the speed up is around 65%, why it does not equal 75% as I have 4 cores and all of them are fully utilized?

P.S:

Can you check the code as I do not do any I/O, and no other processes are working on the machines (normal windows processes)

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1 Answer

  1. Editorial Team

    It could be any number of things. A couple that come to mind

    1. Overhead from administrating the different threads.
    2. Other processes are using resources in the system at the same time.
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