One of the features of the "crate details page" is showing the crate's README, and this is currently implemented by storing the markdown in the database and rendering it on the fly.

This feature is also present on crates.io though, and crates.io solved this by pre-rendering the READMEs in HTML and storing them on the CDN:

https://static.crates.io/readmes/{name}/{name}-{version}.html

We could reduce duplication by fetching that URL server side when the user requests the page, defaulting to the crate's description if the readme is missing.