Performance degradation with large amount of blocks
>>> [!note] Migrated issue
<!-- Drupal.org comment -->
<!-- Migrated from issue #3258394. -->
Reported by: [mattjones86](https://www.drupal.org/user/2600308)
Related to !9
>>>
<h3 id="summary-problem-motivation">Problem/Motivation</h3>
<p>When working on a site with a large amount of content and blocks, this module can cause PHP memory limits to be hit when browsing blocks.</p>
<p>This is due to the SQL Queries in <code>getBlockTypeByUuid()</code> having no restrictions to re-usable blocks.</p>
<h4 id="summary-steps-reproduce">Steps to reproduce</h4>
<ol>
<li>Set up a large amount of inline blocks (my site has ~250,000).</li>
<li>Try to browse available inline blocks with Layout Builder Browser.</li>
</ol>
<h3 id="summary-proposed-resolution">Proposed resolution</h3>
<p>Restrict SQL query to just reusable blocks in `getBlockTypeByUuid()` methods. </p>
<p>OLD:</p>
<div class="codeblock">
<pre><span style="color: #000000"><span style="color: #0000BB"><?php<br> </span><span style="color: #FF8000">/**<br> * Helper function to retrieve uuid->type keyed block array.<br> *<br> * @return str[]<br> * A key-value array of uuid-block type.<br> */<br> </span><span style="color: #007700">private function </span><span style="color: #0000BB">getBlockTypeByUuid</span><span style="color: #007700">() {<br> if (</span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">moduleHandler</span><span style="color: #007700">-></span><span style="color: #0000BB">moduleExists</span><span style="color: #007700">(</span><span style="color: #DD0000">'block_content'</span><span style="color: #007700">)) {<br> </span><span style="color: #FF8000">// Pre-load all reusable blocks by UUID to retrieve block type.<br> </span><span style="color: #0000BB">$query </span><span style="color: #007700">= </span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">database</span><span style="color: #007700">-></span><span style="color: #0000BB">select</span><span style="color: #007700">(</span><span style="color: #DD0000">'block_content'</span><span style="color: #007700">, </span><span style="color: #DD0000">'b'</span><span style="color: #007700">)<br> -></span><span style="color: #0000BB">fields</span><span style="color: #007700">(</span><span style="color: #DD0000">'b'</span><span style="color: #007700">, [</span><span style="color: #DD0000">'uuid'</span><span style="color: #007700">, </span><span style="color: #DD0000">'type'</span><span style="color: #007700">]);<br> </span><span style="color: #0000BB">$results </span><span style="color: #007700">= </span><span style="color: #0000BB">$query</span><span style="color: #007700">-></span><span style="color: #0000BB">execute</span><span style="color: #007700">();<br> return </span><span style="color: #0000BB">$results</span><span style="color: #007700">-></span><span style="color: #0000BB">fetchAllKeyed</span><span style="color: #007700">(</span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">1</span><span style="color: #007700">);<br> }<br> return [];<br> }<br></span><span style="color: #0000BB">?></span></span></pre></div>
<p>NEW:</p>
<div class="codeblock">
<pre><span style="color: #000000"><span style="color: #0000BB"><?php<br> </span><span style="color: #FF8000">/**<br> * Helper function to retrieve uuid->type keyed block array.<br> *<br> * @return str[]<br> * A key-value array of uuid-block type.<br> */<br> </span><span style="color: #007700">private function </span><span style="color: #0000BB">getBlockTypeByUuid</span><span style="color: #007700">() {<br> if (</span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">moduleHandler</span><span style="color: #007700">-></span><span style="color: #0000BB">moduleExists</span><span style="color: #007700">(</span><span style="color: #DD0000">'block_content'</span><span style="color: #007700">)) {<br> </span><span style="color: #FF8000">// Pre-load all reusable blocks by UUID to retrieve block type.<br> </span><span style="color: #0000BB">$query </span><span style="color: #007700">= </span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">database</span><span style="color: #007700">-></span><span style="color: #0000BB">select</span><span style="color: #007700">(</span><span style="color: #DD0000">'block_content'</span><span style="color: #007700">, </span><span style="color: #DD0000">'b'</span><span style="color: #007700">)<br> -></span><span style="color: #0000BB">fields</span><span style="color: #007700">(</span><span style="color: #DD0000">'b'</span><span style="color: #007700">, [</span><span style="color: #DD0000">'uuid'</span><span style="color: #007700">, </span><span style="color: #DD0000">'type'</span><span style="color: #007700">]);<br> </span><span style="color: #0000BB">$query</span><span style="color: #007700">-></span><span style="color: #0000BB">join</span><span style="color: #007700">(</span><span style="color: #DD0000">'block_content_field_data'</span><span style="color: #007700">, </span><span style="color: #DD0000">'bc'</span><span style="color: #007700">, </span><span style="color: #DD0000">'b.id = bc.id'</span><span style="color: #007700">);<br> </span><span style="color: #0000BB">$query</span><span style="color: #007700">-></span><span style="color: #0000BB">condition</span><span style="color: #007700">(</span><span style="color: #DD0000">'bc.reusable'</span><span style="color: #007700">, </span><span style="color: #0000BB">1</span><span style="color: #007700">);<br> </span><span style="color: #0000BB">$results </span><span style="color: #007700">= </span><span style="color: #0000BB">$query</span><span style="color: #007700">-></span><span style="color: #0000BB">execute</span><span style="color: #007700">();<br> return </span><span style="color: #0000BB">$results</span><span style="color: #007700">-></span><span style="color: #0000BB">fetchAllKeyed</span><span style="color: #007700">(</span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">1</span><span style="color: #007700">);<br> }<br> return [];<br> }<br></span><span style="color: #0000BB">?></span></span></pre></div>
<p>Note these methods exist identically in <code>EntityViewModeRestrictionByRegion.php</code> and <code>EntityViewModeRestriction.php</code>.</p>
issue
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