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From: Michael Zimmermann <sigmaepsilon92@gmail.com>
Date: Sat, 17 Sep 2016 17:13:06 +0200
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Subject: how big is the timer event overhead?
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Hi,

if I add a timer with an interval of 1ms, how much will it affect the
system performance?
The callback only adds +1 to a global variable so I can keep track of the
total uptime without the need of a RTC.

Thanks
Michael