Quickly invalidate selected edge content.

How it works

Fast Invalidate applies Fast Purge to selected edge content, invalidating it within approximately five seconds. The behavior sends an If-Modified-Since request to the origin for subsequent requests, replacing it with origin content if its timestamp is more recent. Otherwise, if the origin lacks a Last-Modified header, it sends a simple GET request.

This behavior doesn't include any options. Specifying the behavior itself enables it and forces a validation test for all edge content to which the behavior applies.

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Fast Invalidate doesn't simply delete content if more recent origin content is unavailable. For an independent way to invalidate selected sets of content, and for more information on the feature, see the Fast Purge API.