压缩的JSON大于未压缩的版本

Question

I'll try to clear up my question.

myJSON is a simple JSON string. len(myJSON) = 78

e is json.Marshal(myJSON)

From what I understand, e is now a []byte

Then I gzip e like this:

var buf bytes.Buffer
gz := gzip.NewWriter(&buf)
gz.Write(e)
gz.Close()

And buf.Len() = 96

So... why is my compressed buffer bigger than the original non-compressed string?

Edit: It's hilarious the trolls that down vote a question when someone is trying to understand WHY something is happening. Guess I should just blindly accept it and not ask.

Answer 1

gzip will add a header and make some changes to the original data. For the case, the original data is really small it will not guarantee compressed data will smaller than original data.

So if your program will constantly deal with the small data like this. Compress data use compress library may not a good idea. Some time we serialize the data into binary stream for the case that data is constantly small.

Go gzip package ref:

Package gzip implements reading and writing of gzip format compressed files, as specified in RFC 1952.

RFC1952

gzip format and header:

http://www.onicos.com/staff/iz/formats/gzip.html