School Reading List

A further proof of the bug:

If you comment out these lines in the autoptimize cache php file:

// Cache was just purged, clear page cache and allow others to hook into our purging...
        if ( true === $propagate ) {
            if ( ! function_exists( 'autoptimize_do_cachepurged_action' ) ) {
                function autoptimize_do_cachepurged_action() {
                    do_action( 'autoptimize_action_cachepurged' );
                }
            }
            add_action( 'shutdown', 'autoptimize_do_cachepurged_action', 11 );
            add_action( 'autoptimize_action_cachepurged', array( 'autoptimizeCache', 'flushPageCache' ), 10, 0 );
        }

The issue resolves. .

Crucially, if you then manually purge the autoptimize cache from the admin bar, the WP Fastest Cache DOES NOT clear (if the above code is commented out). This proves that it is not a third party calling Autoptimize to clear AO’s cache thereby clearing WP Fastest Cache’s cache, as you suggested. It is in fact AO clearing WP Fastest Cache’s cache whenever the slightest change is made.

To stress how important this is – if a user has autoptimize installed with this bug, and uses a CDN, Cloudflare, or Cloudfront etc with paid per request pricing, then Autoptimize clearing an entire site’s cache uncommanded will cause a collosal cost increase in CDN bills as the entire site preloads/reloads.

I’d also like to add that you will be able to replicate the issue with a clean install of WP 5.7, and just the WP Fastest Cache and Autoptimize plugins installed and active.

Check line 413 autoptimize/classes/autoptimizeCache.php

add_action( 'autoptimize_action_cachepurged', array( 'autoptimizeCache', 'flushPageCache' ), 10, 0 );

and lines 778-780 :autoptimize/classes/autoptimizeCache.php

       } elseif ( class_exists( 'WpFastestCache' ) ) {
            $wpfc = new WpFastestCache();
            $wpfc->deleteCache();

You will see that Autoptimize is causing the entire WP Fastest Cache’s cache to be cleared when a post is updated. In the WP Fastest Cache log this is indicated: 26-05-2021 @ 14:01:32 flushPageCache

Please advise on a fix. We don’t want a 3000 page website’s entire cache to be cleared when one word is changed! We have built our site arount Autoptimize and would hate to have to redevelop it with another optimisation plugin. Thanks for your time.

• This reply was modified 4 years, 10 months ago by School Reading List.

We don’t use DIVI.

Literally changing one word on a post and updating is causing the entire HTML cache to be cleared.

When Autoptimize is deactivated the problem goes away.

Please can you help?