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Use select to reduce CPU usage. #361

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Use select to reduce CPU usage. #361

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Commits on Nov 6, 2019

  1. Use select to reduce CPU usage. 

    Since the file descriptor to the COM port is non-blocking,
use select to sleep for as long as we need to get data.  This
reduces CPU usage quite a lot.

Signed-off-by: Chris Lalancette <[email protected]>
    @clalancette
    clalancette committed Nov 6, 2019
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Commits on Dec 11, 2019

  1. Fix two potential memory leaks. 

    Signed-off-by: Chris Lalancette <[email protected]>
    @clalancette
    clalancette committed Dec 11, 2019
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