[wp-trac] [WordPress Trac] #56041: Port Audit Full Page Cache from performance plugin to core

[WordPress Trac]

#56041: Port Audit Full Page Cache from performance plugin to core
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 Reporter:  furi3r                    |       Owner:  furi3r
     Type:  enhancement               |      Status:  closed
 Priority:  normal                    |   Milestone:  6.1
Component:  Site Health               |     Version:
 Severity:  normal                    |  Resolution:  fixed
 Keywords:  has-patch has-unit-tests  |     Focuses:  performance
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Changes (by flixos90):

 * status:  assigned => closed
 * resolution:   => fixed


Comment:

 In [changeset:"54043" 54043]:
 {{{
 #!CommitTicketReference repository="" revision="54043"
 Site Health: Introduce page cache check.

 This changeset adds a new `page_cache` check which determines whether the
 site uses a full page cache, and in addition assesses the server response
 time. If no page cache is present and the server response time is slow,
 the check will suggest use of a page cache.

 A few filters are included for customization of the check:
 * `site_status_good_response_time_threshold` filters the number of
 milliseconds below which the server response time is considered good. The
 default value is based on the `server-response-time` Lighthouse audit and
 can be altered using this filter.
 * `site_status_page_cache_supported_cache_headers` filters the map of
 supported cache headers and their callback to determine whether it was a
 cache hit. The default list includes commonly used cache headers, and it
 is filterable to support e.g. additional cache headers used by specific
 vendors.

 Note that due to the nature of this check it is only run in production
 environments.

 Props furi3r, westonruter, spacedmonkey, swissspidy, Clorith.
 Fixes #56041.
 }}}

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Ticket URL: <https://core.trac.wordpress.org/ticket/56041#comment:10>
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