diff --git a/performance.md b/performance.md
--- a/performance.md
+++ b/performance.md
@@ -24,4 +24,16 @@ Benchmark results. The times for split a
         <td>0.0125</td>
         <td>0.00175</td>
     </tr>
+    <tr>
+        <td rowspan="2">c6815615a077</td>
+        <td rowspan="2">gfmul() caching</td>
+        <td>2 / 3</td>
+        <td>5.38e-06</td>
+        <td>4.28e-05</td>
+    </tr>
+    <tr>
+        <td>254 / 254</td>
+        <td>0.00741</td>
+        <td>0.00156</td>
+    </tr>
 </table>
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