900 KiB (= 921.6 kB) for a webpage is problematic, yes.
But 900 KiB for a GIF is actually still pretty small, as it's pretty easy to make them weight 15 MiB on a 4 second long animation.
Then again, depends on what you use to make that animation, this (http://ryocafe.i2p/static/klee-bomb.gif) (requires I2P to view, otherwise replace "ryocafe.i2p" with asc7ewkcvat2wsoi5yuwkej5ukyrqqnpnzpj4u34r2jxnoxhnbx6yqad.onion for Tor) for example is only 378 KiB (= 387 kB).