On Fri, 8 Jun 2018, Max Leske wrote:

> Is anyone aware of a reason for hanging on to SmallDictionary? I'm also 
> curious to know how SmallDictionary came to be. There must have been 
> some advantage over Dictionary at some point in the past.

IIRC it came from Seaside, where it was used to minimize the memory 
footprint of sessions.

Levente