It could be my imagination but it seems that VStar is more sluggish as of SVN 331. This was mentioned in another tracker, but it feels to be a bit worse now. This is most noticeable when working with data sets that are larger than the 2 years retrieved by default. The performance is an issue when plotting a chart and also when clicking on a data point to view the obs details. I'll see if I can figure out how to use the profile feature of my IDE to benchmark this. Perhaps we also need to include a Unit test that would perform an action on a certain (fixed) range of data and report the time to completion. This would help us understand which svn commits are degrading or enhancing performance.