We have an application which automates excel with data from our application reports. To speed things up when the the volume of the report is relatively high, we write a sequential csv file and then import it into the spreadsheet.
This file write process takes a few seconds on Windows Server 2012R2 - but when we upgraded to Server 2016 it was running over 5 minutes and slowed to a crawl.
On a guess we disabled Windows Defender on both Windows Server Standard 2016 systems - and the speed returned to a few seconds.
What is going on here? I wouldn't expect the AV to slow things down by a factor of 100 or more???
Glenn Barber