No, Logtivity won’t impact the speed of your sites.
We store each active log asynchronously. This means we let WordPress carry on processing the request straight away. You don’t have to wait for our plugin to contact Logtivity.io and record new activity logs.
Also, Logtivity limits the reasons we contact our central dashboard. For example, we only check once per hour for any new settings that might have been added in the Logtivity dashboard.