As commented in VWR-281, it seems that caches suffer from performance problems above the 1gb or so size. Obviously this is something which would be nice to have improved, however there is a simple and easily implemented solution which can give better caching sooner rather than later: Multiple caches! The concept is simple; every simulator you visit gets it's own cache folder! In this it has the current VFS system storing whatever the VFS currently stores, plus a textures folder and so-on. Each of these has a limit as set in the cache preference, this would stay with the current 1gb limit for performance reasons. However, in addition, users would choose how many simulators/regions to cache, say 10. If you have 10 cached and want to visit a new one, then the oldest simulator cache is thrown away to make space. In total your cache size would have a maximum of 10gb. This incredibly simple alteration allows us to cache multiple locations that we may visit frequently, without losing perfromance. Since each cache has it's memory limit chosen by performance criteria to the current 1gb limit, there will be almost no extra overhead for this system. All we do is load the appropriate cache for the current simulator, and ignore all others. When we move to a new simulator, we close the current cache and open the cache for the new simulator, creating a new one (and deleting an older one) as required. Instantly we have caches which exceed the current limit, without reducing performance. And now the simulators you visit most often will remain cached for longer. All that is really required is a small amount of extra checking to determine when a new cache is required, or when to switch the currently active cache. All very small operations for the overall improvement.