Speed up the filter function on Event page

1. Proposed title of this feature request

      Speed up the filter function on Event page
2. What is the nature and description of the request?

      To make user quickly to check that the result match the string he typed.
3. Why does the customer need this? (List the business requirements here)

       For customer, when he checks the event stream, there may be too much events, so he supposes to filter by string.However, he has to wait a long time to see the filtered result.
4. List any affected packages or components.