quick experiment: render a note directly from a URL. no relays needed.
https://damus.io/npack#notepack_AWhdWjCYsU981oG75NbuJ1qKSEjO3T4/YFCfvwr3XvT+MuGCdjVFDrs8Wn0SwfjnsrUUQ5rBCmfu89n9nFxo4kV4nZTOkKpo...
You can get it 23% smaller by doing raw DEFLATE on the content + tags:
notepackz = base64( version + id + pubkey + sig + DEFLATE(content + tags) )
notepackz = base64( version + id + pubkey + sig + DEFLATE(content + tags) )
1