diff --git a/feed.xml b/feed.xml
index d75e8b9e29..bb18e3a87d 100644
--- a/feed.xml
+++ b/feed.xml
@@ -5,8 +5,8 @@
         <description>Intended as a documentation theme based on Jekyll for technical writers documenting software and other technical products, this theme has all the elements you would need to handle multiple products with both multi-level sidebar navigation, tags, and other documentation features.</description>
         <link>https://pmd.github.io/pmd/</link>
         <atom:link href="https://pmd.github.io/pmd/feed.xml" rel="self" type="application/rss+xml"/>
-        <pubDate>Fri, 28 May 2021 11:08:19 +0000</pubDate>
-        <lastBuildDate>Fri, 28 May 2021 11:08:19 +0000</lastBuildDate>
+        <pubDate>Fri, 28 May 2021 11:18:32 +0000</pubDate>
+        <lastBuildDate>Fri, 28 May 2021 11:18:32 +0000</lastBuildDate>
         <generator>Jekyll v3.9.0</generator>
         
     </channel>
diff --git a/pmd_release_notes.html b/pmd_release_notes.html
index ad0f1fdc0b..a1141e6fd4 100644
--- a/pmd_release_notes.html
+++ b/pmd_release_notes.html
@@ -1572,6 +1572,11 @@ However, <code class="language-plaintext highlighter-rouge">Object.clone()</code
       <li><a href="https://github.com/pmd/pmd/pull/3268">#3268</a>: [java] ConstructorCallsOverridableMethod: IndexOutOfBoundsException with annotations</li>
     </ul>
   </li>
+  <li>java-performance
+    <ul>
+      <li><a href="https://github.com/pmd/pmd/issues/1438">#1438</a>: [java] InsufficientStringBufferDeclaration false positive for initial calculated StringBuilder size</li>
+    </ul>
+  </li>
   <li>javascript
     <ul>
       <li><a href="https://github.com/pmd/pmd/issues/699">#699</a>: [javascript] Update Rhino library to 1.7.13</li>
diff --git a/pmd_rules_java_performance.html b/pmd_rules_java_performance.html
index 9ed6879bbb..aecaf3627c 100644
--- a/pmd_rules_java_performance.html
+++ b/pmd_rules_java_performance.html
@@ -1955,10 +1955,10 @@ is assumed if the length of the constructor can not be determined.</p>
 
 <p><strong>Example(s):</strong></p>
 
-<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nc">StringBuffer</span> <span class="n">bad</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">StringBuffer</span><span class="o">();</span>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nc">StringBuilder</span> <span class="n">bad</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">StringBuilder</span><span class="o">();</span>
 <span class="n">bad</span><span class="o">.</span><span class="na">append</span><span class="o">(</span><span class="s">"This is a long string that will exceed the default 16 characters"</span><span class="o">);</span>
 
-<span class="nc">StringBuffer</span> <span class="n">good</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">StringBuffer</span><span class="o">(</span><span class="mi">41</span><span class="o">);</span>
+<span class="nc">StringBuilder</span> <span class="n">good</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">StringBuilder</span><span class="o">(</span><span class="mi">41</span><span class="o">);</span>
 <span class="n">good</span><span class="o">.</span><span class="na">append</span><span class="o">(</span><span class="s">"This is a long string, which is pre-sized"</span><span class="o">);</span>
 </code></pre></div></div>