Return field with astrick(*) is going to slow in Solr 8.9.0

[VIshal Patel]

Hello,


We have upgraded Solr from 6.1.0 to 8.9.0. After upgrade we are facing slowness 
when returning field with *.


Solr 8.9.0 [300 milliseconds]
http://XX.XX.XX.XX:XXXX/solr/forms/select?q=id%3AFORM27248682964899&fl=*ORI_FORMTITLE>

Solr 6.1.0 [15 milliseconds]
http://XX.XX.XX.XX:XXXX/solr/forms/select?q=id:FORM1011547110139542&&fl=*ORI_FORMTITLE

Can someone check and suggest possible root cause/changes to solve this issue.

Regards,
Vishal.