size of maildir folders are more than gmail size

[Lucien Pullen]

Also sprach Naveen Kumar on 2015-04-30:
> i recently download gmail accounts and found that the size of folder
> of my account is more than gmail showing size
>
> my gmail account size on gmail is 13 gb but when i downloade using
> offlineimap the folder size is 24 gb
>
> in my setting i reject [Gmail].All mail folder

Gmail performs deduplication and probably compression.  You probably
have messages duplicated across labels.  I've been able to get a similar
space saving with a custom tool and filesystem compression.