When working on smaller projects, very little will need to be done from a performance optimization perspective. As the design grows, your simulator compile time will grow correspondingly as will the time taken to load the design into the simulator. This is true for SVEditor too. Below are some tricks that can be used to help optimize SVEditor performance.
The Workspace is where Eclipse does it's caching. The SVEditor Index lives within the Workspace. As a result having your Workspace on the network means that as Eclipse parses through all your files during an index operation, or performs a lookup in the index it'll have to traverse the network to read or write this information.
Making sure that your Workspace is local to the machine you are running will result in a significant performance improvement. Note that your Workspace is separate from the Project that is being edited, and the Project that you are working on can be remote.
Typically the index is updated as you edit your files. As the index is updated, you could experience slowdowns as you type, due to the index being updated. This can be alleviated in the SVEditor Index Preferences by disabling the Auto-Index function. To disable uncheck.
Window>Preferences>SVEditor>Index Preferences>Enable Editor Auto-Index
You will need to manually re-build the entire index periodically in order to update the index with your latest edits.
Project>Build All