Fastly is a Content Delivery Network (CDN) which uses Varnish as a caching HTTP reverse proxy.

It is bundled in the Magento Commerce Cloud platform.

Blackfire must be able to trigger PHP on the server where you are profiling
(see how the Blackfire stack works).
To do you must make sure that caches are bypassed the Blackfire HTTP headers are preserved:
X-Blackfire-Query, X-Blackfire-Response and X-Blackfire-Error.

Several options are available:

  • If you are a Magento Commerce Cloud customer, there's nothing you need to do. The Fastly bypass for Blackfire is a standard configuration

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