UI responsiveness of the search page is sluggish when many spans in results

[tiffon]

Description

The responsiveness of the search results page slows as the summed number of spans in the search results increases. For instance, with ~20,000 spans, the search form takes several seconds to register the focus on one of the text inputs.

Steps to reproduce the issue:

1. Using the HotROD app, register 400 traces

   var i = 100; var btns = [].slice.call(document.querySelectorAll('.hotrod-button')); while (i--) btns.forEach(btn => btn.click());
   

2. On the search page of the Jaeger UI, select Service = frontend and Limit Results = 400
3. Submit the search and let the page finish loading
4. Click the Min Duration text input
5. Note: Several seconds elapse before the input receives focus
6. Click the Max Duration text input
7. Note: Several seconds elapse before the input receives focus

Describe the results you received:

Several seconds elapse before the form inputs register focus.

Describe the results you expected:

The form inputs register focus immediately.

Additional information you deem important (e.g. issue happens only occasionally):

I've identified the underlying issue, have made changes to address it and will issue a pull request within the next couple of days.