If you have not changed the default Growth Rate settings in SQL Server files, then the default will be applied. SQL Server 2016 is smart, it configures the Growth Rate as 64MB but old versions set this to very low value, resulting too many smaller growth. This slows down the system because the cost of growing a file is very expensive.
How do you check whether the your SQL Server experience too many growths? It is simple with standard reports given. The report Disk Usage shows all occurring of file growth if SQL Server has grown the files since last service restart.
This is what you see.
If you see many growth within a shorter period, you need to change the Growth Rate immediately.