docs: fix report inaccuracies in resource usage and cold/warm tables

- Resource Usage: show 'not measured' for main branch large docs instead of assumed values
- Cold vs Warm: remove CPU/Memory columns (showed cold data, not warm)
- Add note explaining main branch only benchmarked on small docs
- Mark Rendertest main values as '(measured)' for clarity

Author: CybotTM

docs/index.html

@@ -483,8 +483,8 @@ <h3 style="margin-top: 2rem;">Resource Usage Comparison</h3>
                     <tr>
                         <td rowspan="2"><strong>TYPO3 Core Changelog</strong> (3666 files)</td>
                         <td>main</td>
-                        <td>~100% (single-threaded)</td>
-                        <td>N/A</td>
+                        <td>not measured</td>
+                        <td>not measured</td>
                     </tr>
                     <tr>
                         <td style="color: var(--primary); font-weight: 600;">feature</td>
@@ -494,8 +494,8 @@ <h3 style="margin-top: 2rem;">Resource Usage Comparison</h3>
                     <tr>
                         <td rowspan="2"><strong>TYPO3 Core API</strong> (957 files)</td>
                         <td>main</td>
-                        <td>~100% (single-threaded)</td>
-                        <td>N/A</td>
+                        <td>not measured</td>
+                        <td>not measured</td>
                     </tr>
                     <tr>
                         <td style="color: var(--primary); font-weight: 600;">feature</td>
@@ -505,8 +505,8 @@ <h3 style="margin-top: 2rem;">Resource Usage Comparison</h3>
                     <tr>
                         <td rowspan="2"><strong>Rendertest</strong> (98 files)</td>
                         <td>main</td>
-                        <td>~59%</td>
-                        <td>97 MB</td>
+                        <td>59% (measured)</td>
+                        <td>97 MB (measured)</td>
                     </tr>
                     <tr>
                         <td style="color: var(--primary); font-weight: 600;">feature</td>
@@ -521,7 +521,11 @@ <h3 style="margin-top: 2rem;">Resource Usage Comparison</h3>
             </p>
             <p style="color: var(--text-muted); margin-top: 0.5rem; font-size: 0.9rem;">
                 <strong>Memory Efficiency:</strong> Feature branch uses <strong>3x less memory</strong> for small docs (33 MB vs 97 MB)
-                despite parallel processing. PHP profiling via <code>memory_get_peak_usage(true)</code>.
+                despite parallel processing. Memory from PHP <code>memory_get_peak_usage(true)</code>.
+            </p>
+            <p style="color: var(--text-muted); margin-top: 0.5rem; font-size: 0.9rem;">
+                <strong>Note:</strong> Main branch benchmarks only run on small docs due to long execution time (~17 min for Changelog).
+                Main branch is single-threaded (no <code>pcntl_fork</code>).
             </p>
 
             <div class="chart-container">
@@ -587,41 +591,34 @@ <h2>Cold vs Warm Build Performance (Feature Branch)</h2>
                         <th>Documentation</th>
                         <th>Cold Build</th>
                         <th>Warm Build</th>
-                        <th>CPU Usage</th>
-                        <th>Peak Memory</th>
-                        <th>Difference</th>
+                        <th>Improvement</th>
                     </tr>
                 </thead>
                 <tbody>
                     <tr>
                         <td><strong>TYPO3 Core Changelog</strong> (3666 files)</td>
                         <td>43.1s</td>
                         <td>34.1s</td>
-                        <td>437%</td>
-                        <td>942 MB</td>
                         <td><span style="color: var(--success); font-weight: bold;">-21%</span></td>
                     </tr>
                     <tr>
                         <td><strong>TYPO3 Core API</strong> (957 files)</td>
                         <td>33.9s</td>
                         <td>27.1s</td>
-                        <td>387%</td>
-                        <td>567 MB</td>
                         <td><span style="color: var(--success); font-weight: bold;">-20%</span></td>
                     </tr>
                     <tr>
                         <td><strong>Rendertest</strong> (98 files)</td>
                         <td>5.53s</td>
                         <td>4.27s</td>
-                        <td>200%</td>
-                        <td>33 MB</td>
                         <td><span style="color: var(--success); font-weight: bold;">-23%</span></td>
                     </tr>
                 </tbody>
             </table>
             <p style="color: var(--text-muted); margin-top: 1rem; font-size: 0.9rem;">
                 <strong>Note:</strong> Warm builds benefit from Twig template caching persisted between runs.
                 The 20-23% improvement comes primarily from avoiding Twig template recompilation.
+                CPU usage and memory consumption are similar between cold and warm builds.
             </p>
         </div>