Cache post content, translations and nav menu output in persistent object cache.

This MU plugin works well in production providing you understand its source code (133 sloc).

Please see https://github.com/szepeviktor/wordpress-website-lifecycle/blob/master/WordPress-performance.md

Of course you need persistent object cache. Consider Redis server and wp-redis plugin.

Replace the_content() calls in your theme.

NOTICE Replace only argument-less calls! $more_link_text and $strip_teaser are not supported.

find -type f -name "*.php" | xargs -r -L 1 sed -i -e 's|\bthe_content();|the_content_cached();|g'

• wp_suspend_cache_addition( true );
• define( 'DONOTCACHEPAGE', true );

Protection against plugin deactivation.

Copy these to your theme's functions.php.

 if ( ! function_exists( 'the_content_cached' ) ) { function the_content_cached( $more_link_text = null, $strip_teaser = false ) { the_content( $more_link_text, $strip_teaser ); } } if ( ! function_exists( 'get_the_content_cached' ) ) { function get_the_content_cached( $more_link_text = null, $strip_teaser = false ) { return get_the_content( $more_link_text, $strip_teaser ); } } if ( ! function_exists( 'get_template_part_cached' ) ) { function get_template_part_cached( $slug, $name = null, $version_hash = '' ) { get_template_part( $slug, $name ); } }

1. Tiny navigation menu cache - for nav menu output
2. Tiny translation cache - for translations (.mo files)

https://github.com/Rarst/fragment-cache