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<title>[10638] sites/trunk/wordpress.org/public_html/wp-content/plugins/support-forums/inc/class-performance-optimizations.php: Support Forums: cache the result of `count_users()` to speed up the pageload time of wp-admin/users.php.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="http://meta.trac.wordpress.org/changeset/10638">10638</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"http://meta.trac.wordpress.org/changeset/10638","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>dd32</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2021-02-03 05:26:36 +0000 (Wed, 03 Feb 2021)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Support Forums: cache the result of `count_users()` to speed up the pageload time of wp-admin/users.php.
Although this page is rarely needed or used, when it is, it's slooow. This avoids the need for a 20-60s query on each users.php pageload.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#sitestrunkwordpressorgpublic_htmlwpcontentpluginssupportforumsincclassperformanceoptimizationsphp">sites/trunk/wordpress.org/public_html/wp-content/plugins/support-forums/inc/class-performance-optimizations.php</a></li>
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<h3>Diff</h3>
<a id="sitestrunkwordpressorgpublic_htmlwpcontentpluginssupportforumsincclassperformanceoptimizationsphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: sites/trunk/wordpress.org/public_html/wp-content/plugins/support-forums/inc/class-performance-optimizations.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- sites/trunk/wordpress.org/public_html/wp-content/plugins/support-forums/inc/class-performance-optimizations.php 2021-02-03 04:40:24 UTC (rev 10637)
+++ sites/trunk/wordpress.org/public_html/wp-content/plugins/support-forums/inc/class-performance-optimizations.php 2021-02-03 05:26:36 UTC (rev 10638)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -59,6 +59,8 @@
</span><span class="cx" style="display: block; padding: 0 10px"> add_filter( 'bbp_new_reply_pre_set_terms', array( $this, 'limit_topic_reply_tag_creation' ) );
</span><span class="cx" style="display: block; padding: 0 10px"> add_filter( 'bbp_edit_reply_pre_set_terms', array( $this, 'limit_topic_reply_tag_creation' ) );
</span><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ // Add some caching on count_users().
+ add_filter( 'pre_count_users', array( $this, 'cache_count_users' ), 10, 3 );
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> /**
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -555,4 +557,32 @@
</span><span class="cx" style="display: block; padding: 0 10px"> return $existing_terms;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ /**
+ * Cache the result of `count_users()` as the Support Forums site has a lot of users.
+ *
+ * This slows wp-admin/users.php down so much that it's hard to use when required.
+ * As these numbers don't change often, it's cached for 6 hours, which avoids a 20-60s query on each users.php pageload.
+ */
+ public function cache_count_users( $result, $strategy, $site_id ) {
+ static $running = false;
+
+ if ( $result || ! is_multisite() || $running ) {
+ return $result;
+ }
+
+ switch_to_blog( $site_id );
+
+ $result = get_site_transient( 'count_users' );
+ if ( ! $result ) {
+ $running = true;
+ $result = count_users( $strategy, $site_id );
+ $running = false;
+
+ set_site_transient( 'count_users', $result, 6 * HOUR_IN_SECONDS );
+ }
+
+ restore_current_blog();
+
+ return $result;
+ }
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span></span></pre>
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