Any numeric data by default would be treated as a measure. But if you think it is to be treated as a Dimension you can convert as such.
If your field is considered as a measure then you can convert to Dimension. If it is a dimension then you can convert to Measure.
Conversion from dimension to measure or vice-versa may have an impact on existing visuals. For example, if you had a value in the measure but you change it to dimension then the visual can not work as the measures have aggregate functions applied to them.
I am not too sure about the Performance issues. That is something we need to test and see.
Hi @Venkat.Metadata,
Since we have not heard back, I’ll go ahead and close out this topic. However, if you have any additional questions, feel free to create a new post in the community and link this discussion for relevant information if needed.