Noticed performance degrade from lucene-7.5.0 to lucene-8.0.0

[Khurram Shehzad]

Hi All,

I have recently updated from lucene-7.5.0 to lucene-8.0.0. But I noticed 
considerable performance degrade. Queries that used to be executed in 18 to 24 
milliseconds now taking 74 to 110 milliseconds.

Any suggestion please?

Regards,
Khurram