Smartview v25.100 vs v25.200

We have noticed considerable performance difference between Smartview v25.100 vs v25.200. A refresh in v25.100 would take 15 minutes, and the same file would take 57 seconds using v25.200. I reviewed the readme file that was released with 25.200 and I did not see anything that would cause such a dramatic change. Has anyone else experienced this and any ideas what changed between versions that would cause this? Thank you.