<div class="Layout-main"><table>
<thead>
<tr>
<th>Metrics</th>
<th>Good</th>
<th>Poor</th>
</tr>
</thead>
<tbody>
<tr>
<td>TTFB (Time To First Byte)</td>
<td></td>
<td></td>
</tr>
<tr>
<td>FP (First Paint)</td>
<td></td>
<td></td>
</tr>
<tr>
<td>FCP (First Contentful Paint)</td>
<td></td>
<td></td>
</tr>
<tr>
<td>LCP (Largest Contentful Paint)</td>
<td>&#x3C; 2.5 sec</td>
<td>> 4.0 sec</td>
</tr>
<tr>
<td>CLS (Cumulative Layout Shift)</td>
<td>&#x3C; 0.1</td>
<td>> 0.25</td>
</tr>
<tr>
<td>INP (Interaction to Next Paint)</td>
<td>&#x3C; 200 ms</td>
<td>> 500 ms</td>
</tr>
<tr>
<td>TBT (Total Blocking Time)</td>
<td></td>
<td></td>
</tr>
</tbody>
</table>
<p>Note:</p>
<ul>
<li>First Meaningful Paint (FMP) is deprecated in Lighthouse 6.0. In practice FMP has been overly sensitive to small differences in the page load, leading to inconsistent (bimodal) results.</li>
<li>First Input Delay (FID) is no longer a Core Web Vital, and has been replaced by the Interaction to Next Paint (INP) metric.</li>
<li>Max Potential First Input Delay was deprecated in Lighthouse 6.0.</li>
<li>Time to Interactive (TTI) has proved overly sensitive to outlier network requests and long tasks, resulting in high variability in this metric.</li>
</ul>
<p>See:</p>
<ul>
<li><a href="https://web.dev/articles/vitals">Web Vitals | web.dev</a></li>
<li><a href="https://www.volcengine.com/docs/6431/107445">应用性能监控全链路版 - 火山引擎</a></li>
</ul></div><nav class="Layout-sidebar"><ol class="toc-level toc-level-1"></ol></nav>

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Performance Metrics

Metrics	Good	Poor
TTFB (Time To First Byte)
FP (First Paint)
FCP (First Contentful Paint)
LCP (Largest Contentful Paint)	< 2.5 sec	> 4.0 sec
CLS (Cumulative Layout Shift)	< 0.1	> 0.25
INP (Interaction to Next Paint)	< 200 ms	> 500 ms
TBT (Total Blocking Time)