SubD Memory Consumption, V7 and WIP

This question applies to V7 and WIP (screenshot is from a fresh WIP download but behavior is the same as one from a week or two ago).

The attached file contains a simple, reasonably small SubD ellipsoid.

I’m surprised at how much heap memory is reported used. Are multiple megabytes expected to be required for simple SubD objects? (2.38MB for 7, 2.8MB for WIP).

It’s also surprising how much V8 increases this when loading the same file.
(both screenshots are produced by loading Rhino then loading the file).

elipsoid-memory.3dm (63.8 KB)

rhino_en-us_8.0.23248.12305 for the WIP and 7 SR32.