- In short
- Content ordering for cache hit rate means placing fixed instruction content ahead of per-request dynamic content, because dynamic content placed first changes the prefix on every call and prevents any cache hit. Reordering a prompt so the large fixed block comes first and the variable content comes last is often the single highest-leverage caching fix. A cache that never hits still incurs the full cost of the uncached prefix on every request, silently erasing the expected savings.
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