Are you talking about a downloaded empty.html or a downloaded version of
tiddlywiki.com?
TW.com contains all translated interface languages. So your users may need only one or 2 of them.
As mentioned already, you can create
* as single file, that contains a static version of all tiddlers. No javascript ... should work with all browsers.
* many static files, that contain single tiddlers. No javascript ... should work with all browsers.
or
* if you want TW functionality (eg: search), you could compress the javascript source code, to get a smaller file size.
IMO at the moment it doesn't make sense to compress the core js code. ... I doubt it ever will.
reasons:
* A well designed server will send a compressed version over the wire, to the browser. So web traffic will be less, than the actual file size.
* 621kByte sent 2100kByte file size ... tiddlywiki.com.html
* 187kByte sent 892kByte file size ... empty.html
* In my opinion, the advantage to have readable source code, outweights the win of less disk space.
* Many users include images into there TWs. So if you include one image with about 300kbyte, the "compressed javascript" file size advantage is gone.
* Harddisk space is cheap.
* Maintaining a compressed TW is not cheap.
just my 2 cents
-mario