No, let's not stand on the hamster, put the PNG could be a lot smaller. 

Using observium on a site with a slow line, during the login, the hamster takes longer to load than needed.

When I throw the PNG into https://tinypng.com/

It shrinks from 359KB -> 67KB. Seems worthwile. Maybe some other PNG's can be shrunken aswell?

Greetings,

Marc