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    <div class="moz-cite-prefix">On 02/26/2015 03:34 PM, Xiangrong Fang

      wrote:<br>

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              That's even better.<br>

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    <br>

    As said: sleep() does make sense when used for the purpose it's

    provided for (by the OS). And in that use, it imposes the lowest

    possible overhead. <br>

    <br>

    -Michael<br>

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