That site has been around a while, and is definitely a joke ;) No matter what you check off to include in the library, the generated file is 0 bytes.

Default choices on that page show the following file size:

  Final size: 0 bytes uncompressed, 25 bytes gzipped.

Gzip format has: 10 byte header, 8 byte footer, optional additional headers, and DEFLATE compressed content.

So, yeah, +25 bytes seems reasonable.

Yeah, but it bloats up considerably when you add in the other features.