So Google Docs email notifications (about comments being resolved) have added an AMP HTML to their multipart/alternative package. The sizes of the three parts I just got: text/plain 2.2 KB text/x-amp-html 37 KB text/html 18 KB Shouldn't the AMP half be... smaller?

May 22, 2019 · 2:48 PM UTC

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Yes, the AMP HTML version shows slightly more context around the commented text, which seems like a UI improvement that ought to be in all versions... but that's not nearly enough to justify the doubling in size.
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Replying to @davidbaron
you're forgetting all the optimizations they have to load to make it more performant