Is there any performance impact if changing the data types for many columns ?

[saisaranv]

Hello All,

I had a very large data set and is there any performance improvement if I change data types ? 

Ex: instead of int16 can I use bytes ? like that,

[mceleavey · Accepted solution]

Hi @saisaranv ,

the short answer is no, unless the change in data type increases the number of reserved characters. For example, if you have a column with one digit values, don't change it to be a string with 50000 characters. 

Otherwise, no, you're fine.

M.

[saisaranv]

I have verified in official documentation page, with data type changes we can save memory and will improve performance with data types in case of large data sets.