FWIW, it gives you a warning and the chance to disable analytics before sending any analytics. https://docs.brew.sh/Analytics https://docs.brew.sh/Analytics >

FWIW, it gives you a warning and the chance to disable analytics before sending any analytics. https://docs.brew.sh/Analytics https://docs.brew.sh/Analytics > Homebrew gathers anonymous aggregate user behaviour analytics using Google Analytics (until our in-progress migration to our own InfluxDB). You will be notified the first time you run brew update or install Homebrew. Analytics are not enabled until after this notice is shown, to ensure that you can opt out without ever sending analytics data.