We have recently upgraded from Sonarqube 6.7.5 to 8.9.2.
We see that the time effort for some rules have changed and the consequence is that the technical debt has considerably increased.
In Sonarqube 6.7.5 :
and in Sonarqube 8.9.2 :
We passed from 12 minutes to 1 hour for the same rule.
Is it normal ? have you please an explanation ?