You fixed the typo. Visitors still see the old version. Here's why.

A cache keeps a ready-made copy so pages load instantly — most of the web's speed, and the classic bug where old data won't go away. What its…

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You now understand

A cache stores a ready answer so repeat requests skip the work

You now understand

It's where most of the web's speed comes from

You now understand

A stale cache showing old data is the classic bug, controlled by the copy's lifetime (TTL)

What this means for your app

If your app shows stale data after a change, a cache is holding an old copy; the fix is a shorter lifetime or clearing it. If a page is needlessly slow, caching a rarely-changing result speeds it…

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You fixed the typo. Visitors still see the old version. Here's why.

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