System becoming sluggish

Hi all

I have an issue where my layouts are starting to get sluggish on load and there is noticable flickering as scripts are executed. I'm unsure what element of my construction is causing this to happen. I am developing on the Windows platform.

All my tables are joined to two TOCs of themselves. One an equality join which checks for uniqueness (which I could do without and use native validation) and one a cartesian cross product join which is used for my archive.

I have four calculation fields in each table.

cActive = not Archived Automatically create indexes when needed

cCountRecords = Count ( ArchiveTOC::SerialID ) Unstored

cCountArchive = Count ( ArchiveTOC::Archived ) Unstored

cTotalActive = Get ( TotalRecordCount ) - Count ( ArchiveTOC::Archived ) Unstored

These fields are diplayed on my layouts using merge fields.

I have many tables, the more I build, the more sluggish the system performs.

How often are these unstored calculation fields updated? Is it solely when they are in use on a layout, or are they permenantly being calculated?

Could this be the cause of the sluggish performance? What would be suggested to increase performance in respect to loading layouts and speed of script execution?

Thanks in advance

Lee