How to use attatchment effectively in jester?

[shawnye]

I write this code: 
    
    
    get "/attachment":
        attachment "public/root/test.rar "
        resp readFile "public/root/test.rar "
    

build on nim 0.15.2 , windows 7

run started : memeory used: 744KiB test.rar is about 5.158MiB, after download 
:memeory used: 46.855MiB

It's totally unacceptable.

So my question is : how to use attatchment effectively or correctly in jester?

Thank you!