dom/serviceworkers/test/performance/time_fetch.html

   1 <!DOCTYPE HTML>
   2 <html>
   3 <head>
   4 <script>
   5
   6   "use strict";
   7
   8   async function time_fetch(url) {
   9     let start = performance.now();
  10     let res = await fetch(url);
  11     let elapsed = performance.now() - start;
  12
  13     return {
  14       elapsed_ms : elapsed,
  15       status : res.status,
  16       data : await res.text()
  17     };
  18   }
  19
  20   async function time_xhr(url) {
  21     let xhr = new XMLHttpRequest();
  22     xhr.open("GET", url, false);
  23     let start = performance.now();
  24     xhr.send();
  25     let elapsed = performance.now() - start;
  26
  27     return {
  28       elapsed_ms : elapsed,
  29       status : xhr.status,
  30       data : xhr.responseText
  31     }
  32   }
  33
  34 </script>
  35 </head>
  36 <body>
  37 </body>
  38 </html>