vibe.d's example is good, but Memory Usage is bigger than beeblog?

[FrankLike via Digitalmars-d-learn]

The form-interface-example.exe's Memory Usage is 3.5M,if have 
some error,then Memory Usage is 6.7M,if error is closed,the 
Memory Usage keeps in 6.7M ,until you close the exe.

the error :such as

'500 - Internal Server Error

Internal Server Error

Internal error information:
object.Exception at ..\..\source\vibe\http\form.d(234): No method 
found that matches the found form data:
Overload 
addUser(vibe.http.server.HTTPServerRequest,vibe.http.server.HTTPServerResponse,immutable(char)[],immutable(char)[],immutable(char)[]) 
failed: '



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Frank