Bring back bootstrap

Author: rylev

site/static/compare.html

@@ -342,7 +342,7 @@ <h2>Comparing <span id="stat-header">{{stat}}</span> between <span id="before">{
                 </tbody>
             </table>
             <br />
-            <table class="compare" v-if="data && data.a.bootstrap.length > 0">
+            <table class="compare" style="margin: auto;" v-if="data && Object.keys(data.a.bootstrap).length > 0">
                 <tr>
                     <td colspan="4">bootstrap timings; variance is 1-3% on smaller benchmarks! Values in seconds.</td>
                 </tr>