Combining fields into one for performance?

I currently have 140 fields in my Elasticsearch index-based App Search Engine. I realized that 40 of those fields contain data that does not need to be indexed (it's display only data), so I marked them index:false in the mapping. After thinking about it, I could combine those 40 fields into one called "display_only_data" or similar with the idea that reducing the number of fields by 40 will help the system perform better.

So my questions are:

  1. Does reducing the number of fields help the system perform better?
  2. If fields are marked index:false, do they not impact the system - meaning they don't really count towards the number of fields because they are not indexed anyway?

Thanks in advance!

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